作者机构：
Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian, Beijing 100193, China;National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, China;[Yijue Fei; Keren Jiao; Xiaoyang Liu; Baolong Wang; Rui Song; Zilin Meng; Binbin Liu; Jiaqi Wu; Chenyu Qi; Wenfeng Zhou; Haixiang Gao] College of Science, China Agricultural University, China;[Yuanlin Zhu] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China;[Shuwen Hu] Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian, Beijing 100193, China<&wdkj&>National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, China
通讯机构：
[Haixiang Gao] C;[Shuwen Hu] B;College of Science, China Agricultural University, China<&wdkj&>Beijing Key Laboratory of Farmland Soil Pollution Prevention-control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, No. 2 Yuanmingyuan West Road, Haidian, Beijing 100193, China<&wdkj&>National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, China
摘要：
This study introduces a composite amendment, containing CaSO₄, MgSO₄, Fe₂(SO₄)₃, and Palygorskite (PGS), for concurrently improving saline-alkali soil physicochemical properties and promoting crop growth via in situ soil regulation and nutrient release. Experimental results demonstrated Layered Double Hydroxide (LDH) structure formation within the amended soil after 20 days, a key in situ mineralization mechanism absent in the control. This process significantly reduced soil pH from 9.85 to 7.86 (a 20.2 % decrease) and drastically lowered CO₃²⁻ content from 33.43 g/kg to 5.12 g/kg (an 84.68 % reduction), effectively mitigating soil alkalinity. Concurrently, exchangeable Na⁺ content decreased markedly from 700.7 mg/kg to 183.67 mg/kg (a 73.8 % reduction), alleviating sodicity. Furthermore, the amendment substantially increased water-soluble nutrient ions: Ca²⁺ (1.17–30.35 mg/kg), Mg²⁺ (0.125–9.58 mg/kg), total available Fe (49.78–89.35 mg/kg), and available SO₄²⁻ (2.06–21.62 g/kg). Notably, the amendment enhanced Soil Organic Matter (SOM) retention after simulated leaching; SOM in amended soil (6.81 g/kg) remained significantly higher than the control (5.14 g/kg), indicating improved carbon stabilization. Pot experiments using ryegrass confirmed the amendment's efficacy, showing significantly enhanced germination, root length, and shoot length, even enabling immediate planting post-application. In summary, the composite amendment leverages in situ LDH formation for stable CO₃²⁻ immobilization and alkalinity reduction, while enriching the soil with essential nutrients (Ca, Mg, Fe, S). This dual action facilitates immediate crop establishment, integrating soil regulation with controlled fertilizer distribution.
This study introduces a composite amendment, containing CaSO₄, MgSO₄, Fe₂(SO₄)₃, and Palygorskite (PGS), for concurrently improving saline-alkali soil physicochemical properties and promoting crop growth via in situ soil regulation and nutrient release. Experimental results demonstrated Layered Double Hydroxide (LDH) structure formation within the amended soil after 20 days, a key in situ mineralization mechanism absent in the control. This process significantly reduced soil pH from 9.85 to 7.86 (a 20.2 % decrease) and drastically lowered CO₃²⁻ content from 33.43 g/kg to 5.12 g/kg (an 84.68 % reduction), effectively mitigating soil alkalinity. Concurrently, exchangeable Na⁺ content decreased markedly from 700.7 mg/kg to 183.67 mg/kg (a 73.8 % reduction), alleviating sodicity. Furthermore, the amendment substantially increased water-soluble nutrient ions: Ca²⁺ (1.17–30.35 mg/kg), Mg²⁺ (0.125–9.58 mg/kg), total available Fe (49.78–89.35 mg/kg), and available SO₄²⁻ (2.06–21.62 g/kg). Notably, the amendment enhanced Soil Organic Matter (SOM) retention after simulated leaching; SOM in amended soil (6.81 g/kg) remained significantly higher than the control (5.14 g/kg), indicating improved carbon stabilization. Pot experiments using ryegrass confirmed the amendment's efficacy, showing significantly enhanced germination, root length, and shoot length, even enabling immediate planting post-application. In summary, the composite amendment leverages in situ LDH formation for stable CO₃²⁻ immobilization and alkalinity reduction, while enriching the soil with essential nutrients (Ca, Mg, Fe, S). This dual action facilitates immediate crop establishment, integrating soil regulation with controlled fertilizer distribution.
作者机构：
[Xia Liu; Zhongshan Feng; Cuiwen Deng; Quan Yang; Minhao Wang; Xinjie Zhang; Yi Hu; Yufan Zheng; Juan Zeng; Juanjuan Han] Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China;[Bencai Lin] School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, PR China
通讯机构：
[Juan Zeng; Juanjuan Han] H;Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China
摘要：
This work reports an eco-friendly, economical, and straightforward fabrication of chitosan (CS)/poly(diallyldimethylammonium chloride) (PDDA) blended anion exchange membranes via an aqueous processing strategy, where CS dissolved in a KOH/urea/H 2 O system forms the polymer matrix and PDDA acts as the hydroxide-ion conductor. Membranes are cast from solution and neutralized in KCl(aq) to form a gel film, followed by dehydration to form films. Robust hydrogen bond cross-linking facilitates lateral aggregation of chitosan chains, ensuring excellent component compatibility, low in-plane swelling (4.3–10.3 % at 80 °C), and favorable mechanical properties. The inherent hydrophilicity of CS and PDDA, imparts high through-plane swelling (45.0–150.1 % at 80 °C) and water uptake (142.5–327.2 % at 80 °C). High water uptake facilitates improved hydroxide conductivity (22.6–41.2 mS cm −1 at 80 °C) and significantly enhances alkaline stability in hot KOH solutions (mass retention: 79.3–88.6 %; IEC retention: 70.6–73.9 %; conductivity retention: 76.8–86.1 %). The optimized PDDA@CS 7.0% -2 membrane achieves a peak power density of 180.0 mW cm −2 at 325.2 mA cm −2 , demonstrating competitive performance among CS or PDDA-based AEMs.
This work reports an eco-friendly, economical, and straightforward fabrication of chitosan (CS)/poly(diallyldimethylammonium chloride) (PDDA) blended anion exchange membranes via an aqueous processing strategy, where CS dissolved in a KOH/urea/H 2 O system forms the polymer matrix and PDDA acts as the hydroxide-ion conductor. Membranes are cast from solution and neutralized in KCl(aq) to form a gel film, followed by dehydration to form films. Robust hydrogen bond cross-linking facilitates lateral aggregation of chitosan chains, ensuring excellent component compatibility, low in-plane swelling (4.3–10.3 % at 80 °C), and favorable mechanical properties. The inherent hydrophilicity of CS and PDDA, imparts high through-plane swelling (45.0–150.1 % at 80 °C) and water uptake (142.5–327.2 % at 80 °C). High water uptake facilitates improved hydroxide conductivity (22.6–41.2 mS cm −1 at 80 °C) and significantly enhances alkaline stability in hot KOH solutions (mass retention: 79.3–88.6 %; IEC retention: 70.6–73.9 %; conductivity retention: 76.8–86.1 %). The optimized PDDA@CS 7.0% -2 membrane achieves a peak power density of 180.0 mW cm −2 at 325.2 mA cm −2 , demonstrating competitive performance among CS or PDDA-based AEMs.
作者机构：
[Wenbo Zhang; Xinlei Gao] School of Materials Science and Engineering, Hubei University, Wuhan 430062, China;National Key Laboratory of Aerospace Chemical Power, Xiangyang 441003, China;Hubei Institute of Aerospace Chemistry Technology, Xiangyang 441003, China;[Yuwei Cheng] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Rui Yu] National Key Laboratory of Aerospace Chemical Power, Xiangyang 441003, China<&wdkj&>Hubei Institute of Aerospace Chemistry Technology, Xiangyang 441003, China
通讯机构：
[Rui Yu] N;National Key Laboratory of Aerospace Chemical Power, Xiangyang 441003, China<&wdkj&>Hubei Institute of Aerospace Chemistry Technology, Xiangyang 441003, China
摘要：
In this study, 38 organic compounds were used as lubricants in the GCr15 steel/polyimide (PI) friction system to systematically compare the influence mechanism of lubricant molecular structures on the friction performance of the system. Quantitative structure tribo-ability relationship (QSTR) models linking structural descriptors with coefficients of friction were established using random forest (RF) and extreme gradient boosting (XGBoost) algorithms, respectively. Based on comparisons of performance metrics such as fitting degree and generalization ability, the QSTR model developed by the RF algorithm was selected to quantitatively analyze the nonlinear influence mechanism of lubricant molecular structures on coefficients of friction. The study preliminarily reveals that the ability of lubricant molecules to form hydrogen bonds with PI macromolecules, the strength of van der Waals forces, and the influence of molecular geometric conformation on the effective interfacial interaction distance collectively constitute the key factors affecting the friction performance of the system.
In this study, 38 organic compounds were used as lubricants in the GCr15 steel/polyimide (PI) friction system to systematically compare the influence mechanism of lubricant molecular structures on the friction performance of the system. Quantitative structure tribo-ability relationship (QSTR) models linking structural descriptors with coefficients of friction were established using random forest (RF) and extreme gradient boosting (XGBoost) algorithms, respectively. Based on comparisons of performance metrics such as fitting degree and generalization ability, the QSTR model developed by the RF algorithm was selected to quantitatively analyze the nonlinear influence mechanism of lubricant molecular structures on coefficients of friction. The study preliminarily reveals that the ability of lubricant molecules to form hydrogen bonds with PI macromolecules, the strength of van der Waals forces, and the influence of molecular geometric conformation on the effective interfacial interaction distance collectively constitute the key factors affecting the friction performance of the system.
期刊：
Materials Research Bulletin,2026年193:113708 ISSN：0025-5408
通讯作者：
Fengjiao Quan<&wdkj&>Zhiping Yang<&wdkj&>Jianfen Li
作者机构：
[Fengjiao Quan; Xiaolan Chen; Wenjuan Shen; Jianfen Li; Fangyuan Chen] College of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China;[Zhiping Yang] School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 610031, PR China
通讯机构：
[Fengjiao Quan; Jianfen Li] C;[Zhiping Yang] S;College of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China<&wdkj&>School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 610031, PR China
摘要：
Photocatalytic degradation is a promising approach for tackling insecticide pollution, such as imidacloprid (IMI), but it faces challenges including low efficiency, long treatment times, and limited mineralization. Herein, we report a method utilizing carboxymethyl cellulose (CMC) macromolecules to regulate the growth of bismuth oxychloride (BiOCl) and synthesize ultra-thin BiOCl nanosheets (UT- BiOCl) for the photocatalytic removal of IMI. UT-BiOCl can photocatalytically degrade 99.9 % of IMI within 80 min. The photocatalytic degradation rate of IMI by UT- BiOCl was 2.4 times that of BiOCl. Moreover, the photocatalytic degradation of IMI by UT- BiOCl was still as high as 90 % after 5 cycles. Further experiments and density functional theory (DFT) show that the regulation of CMC not only significantly improves the separation and transfer efficiency of photogenerated electrons and holes, but also promotes the generation of reactive species. As a result, the photocatalytic performance of the UT- BiOCl was substantially improved. This study offers a feasible strategy for the biomass-assisted synthesis of highly efficient photocatalysts.
Photocatalytic degradation is a promising approach for tackling insecticide pollution, such as imidacloprid (IMI), but it faces challenges including low efficiency, long treatment times, and limited mineralization. Herein, we report a method utilizing carboxymethyl cellulose (CMC) macromolecules to regulate the growth of bismuth oxychloride (BiOCl) and synthesize ultra-thin BiOCl nanosheets (UT- BiOCl) for the photocatalytic removal of IMI. UT-BiOCl can photocatalytically degrade 99.9 % of IMI within 80 min. The photocatalytic degradation rate of IMI by UT- BiOCl was 2.4 times that of BiOCl. Moreover, the photocatalytic degradation of IMI by UT- BiOCl was still as high as 90 % after 5 cycles. Further experiments and density functional theory (DFT) show that the regulation of CMC not only significantly improves the separation and transfer efficiency of photogenerated electrons and holes, but also promotes the generation of reactive species. As a result, the photocatalytic performance of the UT- BiOCl was substantially improved. This study offers a feasible strategy for the biomass-assisted synthesis of highly efficient photocatalysts.
作者机构：
[Teng Yan; Xufeng Ji; Lin Zhou; Xing Ding; Yi Yang; Xiaohu Zhang; Hao Chen] College of Chemistry, Huazhong Agricultural University, Wuhan 430070, PR China;[Ke Dai] College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China;[Bo Chai; Deng Ding] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China
通讯机构：
[Xiaohu Zhang; Ke Dai; Hao Chen] C;College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China<&wdkj&>College of Chemistry, Huazhong Agricultural University, Wuhan 430070, PR China
摘要：
This work pioneers precise fluorination engineering in pyrene-based covalent organic frameworks (COFs) to unlock exceptional photocatalytic hydrogen (H 2 ) evolution. Through systematic modulation of fluorine substitution patterns, we synthesized three distinct COFs: non-fluorinated (TF 0 CN-COF), fully fluorinated (TF 1 CN-COF), and partially fluorinated (TF 0.5 CN-COF). While TF 0 CN-COF’s symmetric donor-acceptor structure permits intramolecular charge transfer, it suffers from weak electron localization and scarce active sites. Conversely, TF 1 CN-COF’s full fluorination enhances carrier separation but its over-symmetry diminishes polarization and passivates catalytic centers. Critically, the partially fluorinated TF0.5CN-COF induces strong polarization that disrupts framework symmetry, generating a directional built-in electric field to localize electron density. Remarkably, the optimized TF 0.5 CN-Cu achieves a record hydrogen evolution rate of 10.5 mmol h −1 g −1 , representing a 47.8 fold enhancement over TF 0 CN-COF. The work establishes a noble-metal-free paradigm leveraging irreversible C C linkages for stability and asymmetric fluorination for electronic control. By elucidating fluorination-mediated structure-property relationships, this study provides a blueprint for designing efficient COF photocatalysts through active-site and band-structure synergy.
This work pioneers precise fluorination engineering in pyrene-based covalent organic frameworks (COFs) to unlock exceptional photocatalytic hydrogen (H 2 ) evolution. Through systematic modulation of fluorine substitution patterns, we synthesized three distinct COFs: non-fluorinated (TF 0 CN-COF), fully fluorinated (TF 1 CN-COF), and partially fluorinated (TF 0.5 CN-COF). While TF 0 CN-COF’s symmetric donor-acceptor structure permits intramolecular charge transfer, it suffers from weak electron localization and scarce active sites. Conversely, TF 1 CN-COF’s full fluorination enhances carrier separation but its over-symmetry diminishes polarization and passivates catalytic centers. Critically, the partially fluorinated TF0.5CN-COF induces strong polarization that disrupts framework symmetry, generating a directional built-in electric field to localize electron density. Remarkably, the optimized TF 0.5 CN-Cu achieves a record hydrogen evolution rate of 10.5 mmol h −1 g −1 , representing a 47.8 fold enhancement over TF 0 CN-COF. The work establishes a noble-metal-free paradigm leveraging irreversible C C linkages for stability and asymmetric fluorination for electronic control. By elucidating fluorination-mediated structure-property relationships, this study provides a blueprint for designing efficient COF photocatalysts through active-site and band-structure synergy.
作者机构：
[Jia Wang; Cuiwen Deng; Minhao Wang; Quan Yang; Xinjie Zhang; Qi Xiong; Tianying Gong; Peiwen Yang; Juanjuan Han] Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, PR China;[Bencai Lin] School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou, 213164, PR China
通讯机构：
[Juanjuan Han] H;Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, PR China
摘要：
While high ionic conductivity, robust mechanical properties, and alkaline stability are prerequisites for anion exchange membranes (AEMs), enhanced interfacial mass transfer between AEMs and electrodes is equally critical. Poor interfacial contact impedes ion transport, degrading device performance. Here, we fabricate a semi-interpenetrating (SIPN) AEM (SIPN- c Celx/PDDAy) via a hydrogel strategy using crosslinked cellulose and poly(diallyldimethylammonium) (PDDA), featuring swelling anisotropy and high hydration. Lateral cellulose aggregation induces decoupled swelling: low in-plane swelling (9.0–15.3 % at 80 °C) maintains mechanical integrity, while high through-plane swelling achieves dual functions. It enables adaptive filling of micro-gaps at membrane-catalyst interfaces in membrane electrode assemblies, reducing interfacial resistance, while simultaneously boosting water uptake (277.1–427.4 % at 80 °C) to synergistically enhance ionic conductivity (101.1–143.7 mS cm −1 at 80 °C) via hydrogen-bonding-assisted ion transport. Abundant cellulose hydroxyls further improve mechanical resilience under hydration-dehydration cycles. Besides, the cationic-free cellulose framework combined with stable PDDA ensures good alkaline stability at 60 °C (86.8–92.3 % mass retention and 88.6–94.6 % conductivity retention after 15 days in 1 M KOH). The SIPN- c Cel100/PDDA60 delivers a current density of 3.0 A cm −2 at 2.0 V in an AEM water electrolyzer (80 °C).
While high ionic conductivity, robust mechanical properties, and alkaline stability are prerequisites for anion exchange membranes (AEMs), enhanced interfacial mass transfer between AEMs and electrodes is equally critical. Poor interfacial contact impedes ion transport, degrading device performance. Here, we fabricate a semi-interpenetrating (SIPN) AEM (SIPN- c Celx/PDDAy) via a hydrogel strategy using crosslinked cellulose and poly(diallyldimethylammonium) (PDDA), featuring swelling anisotropy and high hydration. Lateral cellulose aggregation induces decoupled swelling: low in-plane swelling (9.0–15.3 % at 80 °C) maintains mechanical integrity, while high through-plane swelling achieves dual functions. It enables adaptive filling of micro-gaps at membrane-catalyst interfaces in membrane electrode assemblies, reducing interfacial resistance, while simultaneously boosting water uptake (277.1–427.4 % at 80 °C) to synergistically enhance ionic conductivity (101.1–143.7 mS cm −1 at 80 °C) via hydrogen-bonding-assisted ion transport. Abundant cellulose hydroxyls further improve mechanical resilience under hydration-dehydration cycles. Besides, the cationic-free cellulose framework combined with stable PDDA ensures good alkaline stability at 60 °C (86.8–92.3 % mass retention and 88.6–94.6 % conductivity retention after 15 days in 1 M KOH). The SIPN- c Cel100/PDDA60 delivers a current density of 3.0 A cm −2 at 2.0 V in an AEM water electrolyzer (80 °C).
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects,2026年728:138650 ISSN：0927-7757
通讯作者：
Xiaoli Chen<&wdkj&>Bo Chai
作者机构：
[Jingyi Hu; Surui Qiao; Yi Qin; Jian Pan; Zhonghua Feng] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China;Hubei Province Key Laboratory of Agricultural Waste Resource Utilization, Wuhan Polytechnic University, Wuhan 430023, PR China;College of Urban Construction, Wuchang Shouyi University, Wuhan 430070, PR China;[Xiaoli Chen; Bo Chai] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China<&wdkj&>Hubei Province Key Laboratory of Agricultural Waste Resource Utilization, Wuhan Polytechnic University, Wuhan 430023, PR China;[Jiangrong Xiao] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China<&wdkj&>College of Urban Construction, Wuchang Shouyi University, Wuhan 430070, PR China
通讯机构：
[Xiaoli Chen; Bo Chai] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China<&wdkj&>Hubei Province Key Laboratory of Agricultural Waste Resource Utilization, Wuhan Polytechnic University, Wuhan 430023, PR China
摘要：
Heavy metal pollution, particularly from Pb 2+ ions in aqueous solution, poses severe risks to environmental and human health, necessitating efficient and sustainable remediation strategies. In this study, a novel composite aerogel adsorbent, UiO-66-SO 3 H metal-organic framework hybridized with cellulose nanofibers (denoted as MCA-x), was synthesized via a facile cross-linking and freeze-drying approach. Among them, MCA-0.2 exhibited the best performance, achieving a maximum Pb 2+ adsorption capacity of 354.88 mg/g at 30 °C, with adsorption equilibrium reached within 60 min. The adsorption followed a pseudo-second-order kinetic model and the Langmuir isotherm, confirming that chemisorption and monolayer adsorption dominated the process. Systematic evaluations demonstrated excellent adsorption performance across a wide range of aqueous environments, including different pH levels, high ionic strengths, and the presence of natural organic matter. XPS and FTIR analyses revealed that Pb 2+ removal was governed by ion exchange and inner-sphere coordination between –SO 3 H groups and Pb 2+ , along with contributions from –COOH groups and electrostatic interactions. Fixed-bed column experiments further validated the practical applicability, where 0.62 g of MCA-0.2 purified 2500 mL of Pb 2+ solution (20 mg/L) to below the WHO guideline limit of 0.01 mg/L. This work highlights a scalable, eco-friendly, and highly efficient adsorbent for Pb 2+ remediation, offering promising potential for real-world wastewater treatment.
Heavy metal pollution, particularly from Pb 2+ ions in aqueous solution, poses severe risks to environmental and human health, necessitating efficient and sustainable remediation strategies. In this study, a novel composite aerogel adsorbent, UiO-66-SO 3 H metal-organic framework hybridized with cellulose nanofibers (denoted as MCA-x), was synthesized via a facile cross-linking and freeze-drying approach. Among them, MCA-0.2 exhibited the best performance, achieving a maximum Pb 2+ adsorption capacity of 354.88 mg/g at 30 °C, with adsorption equilibrium reached within 60 min. The adsorption followed a pseudo-second-order kinetic model and the Langmuir isotherm, confirming that chemisorption and monolayer adsorption dominated the process. Systematic evaluations demonstrated excellent adsorption performance across a wide range of aqueous environments, including different pH levels, high ionic strengths, and the presence of natural organic matter. XPS and FTIR analyses revealed that Pb 2+ removal was governed by ion exchange and inner-sphere coordination between –SO 3 H groups and Pb 2+ , along with contributions from –COOH groups and electrostatic interactions. Fixed-bed column experiments further validated the practical applicability, where 0.62 g of MCA-0.2 purified 2500 mL of Pb 2+ solution (20 mg/L) to below the WHO guideline limit of 0.01 mg/L. This work highlights a scalable, eco-friendly, and highly efficient adsorbent for Pb 2+ remediation, offering promising potential for real-world wastewater treatment.
作者机构：
[Wenji Liang; Junwei Shi; Zhenhua Qin; Yun He; Jianfen Li] Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Jinguang Cai] Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
通讯机构：
[Zhenhua Qin] H;[Jinguang Cai] I;Hubei Key Laboratory of Agricultural Waste Resource Utilization, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
摘要：
Exploring efficient and durable non-noble metal catalysts toward oxygen reduction/evolution reaction (ORR/OER) is of practical significance in advancing Zn-air batteries. Herein, we introduce a three-dimensional (3D) bifunctional electrocatalyst (Fe/Ni@NSC) consisting of N, S-dual doped mesoporous carbon nanosheets/carbon nanotubes embedded with abundant FeS/FeNi nanoparticles and Fe/Ni-N x sites by integrating rod-like ZIF-L@S-g-C 3 N 4 with Fe/Ni-phen complex and subsequent pyrolysis. The 3D structure not only offers a high surface area for active sites but also accelerates O 2 transport/charge transfer. Leveraging the synergistic effect of the 3D porous carbon network and multiple active sites, Fe/Ni@NSC exhibited outstanding activities in both ORR (half-wave potential, 0.868 V) and OER (overpotential, 317 mV at 10 mA cm −2 ), indicating a low potential gap of 0.679 V, outperforming the Pt/C + RuO 2 benchmarks (0.695 V). The Zn-air batteries based on Fe/Ni@NSC achieved a promising open circuit voltage (1.47 V), peak power density (172.59 mW cm −2 ), as well as long-term cycling stability (370 h). Furthermore, density functional theory (DFT) calculations also demonstrated that the interfacial electronic interaction between FeS and FeNi effectively boosted the bifunctional catalytic performance for ORR/OER. This study lays the foundation for designing low-cost and efficient 3D structure non-noble metal catalysts for more energy conversion and storage devices.
Exploring efficient and durable non-noble metal catalysts toward oxygen reduction/evolution reaction (ORR/OER) is of practical significance in advancing Zn-air batteries. Herein, we introduce a three-dimensional (3D) bifunctional electrocatalyst (Fe/Ni@NSC) consisting of N, S-dual doped mesoporous carbon nanosheets/carbon nanotubes embedded with abundant FeS/FeNi nanoparticles and Fe/Ni-N x sites by integrating rod-like ZIF-L@S-g-C 3 N 4 with Fe/Ni-phen complex and subsequent pyrolysis. The 3D structure not only offers a high surface area for active sites but also accelerates O 2 transport/charge transfer. Leveraging the synergistic effect of the 3D porous carbon network and multiple active sites, Fe/Ni@NSC exhibited outstanding activities in both ORR (half-wave potential, 0.868 V) and OER (overpotential, 317 mV at 10 mA cm −2 ), indicating a low potential gap of 0.679 V, outperforming the Pt/C + RuO 2 benchmarks (0.695 V). The Zn-air batteries based on Fe/Ni@NSC achieved a promising open circuit voltage (1.47 V), peak power density (172.59 mW cm −2 ), as well as long-term cycling stability (370 h). Furthermore, density functional theory (DFT) calculations also demonstrated that the interfacial electronic interaction between FeS and FeNi effectively boosted the bifunctional catalytic performance for ORR/OER. This study lays the foundation for designing low-cost and efficient 3D structure non-noble metal catalysts for more energy conversion and storage devices.
摘要：
Tin oxide (SnO 2 ) as one of the most intensively investigated anode materials for LIBs is impeded for its commercial application due to the low electronic conductivity and huge volume change during the charge/discharge process which resulting in severe capacity fading and poor cycling ability. Herein, hybrid SnO 2 /MoS 2 @C nanocomposite was designed and synthesized hydrothermally using P123 as dispersant and glucose as the carbon source, and investigated electrochemically and comparatively. The results show that the hybrid SnO 2 /MoS 2 @C nanocomposite anode delivers reversible specific capacities of 1047.41, 985.06, 837.23, 687.37 and 545.96 mAh g −1 at current densities of 0.1, 0.2, 0.5, 1, and 2 A g −1 , respectively and the discharge specific capacity still remains ca. 1047 mAh g −1 after 200 cycles at 0.1 A g −1 , demonstrating an improved cycling stability and rate capability, which might be attributed to the unique hybrid architecture with synergistic effect on the reaction kinetics and charge transfer properties. This paves a way for developing advanced energy storage materials in in next-generation energy storage systems.
Tin oxide (SnO 2 ) as one of the most intensively investigated anode materials for LIBs is impeded for its commercial application due to the low electronic conductivity and huge volume change during the charge/discharge process which resulting in severe capacity fading and poor cycling ability. Herein, hybrid SnO 2 /MoS 2 @C nanocomposite was designed and synthesized hydrothermally using P123 as dispersant and glucose as the carbon source, and investigated electrochemically and comparatively. The results show that the hybrid SnO 2 /MoS 2 @C nanocomposite anode delivers reversible specific capacities of 1047.41, 985.06, 837.23, 687.37 and 545.96 mAh g −1 at current densities of 0.1, 0.2, 0.5, 1, and 2 A g −1 , respectively and the discharge specific capacity still remains ca. 1047 mAh g −1 after 200 cycles at 0.1 A g −1 , demonstrating an improved cycling stability and rate capability, which might be attributed to the unique hybrid architecture with synergistic effect on the reaction kinetics and charge transfer properties. This paves a way for developing advanced energy storage materials in in next-generation energy storage systems.
作者机构：
[Hang Yang; Hongli Diao; Shibin Xia] Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, China;[Wenxuan Jiao] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, China;[Lingyun Zouyi] Hubei Junbang Environmental Technology Co., Ltd., Wuhan, China
通讯机构：
[Hongli Diao; Shibin Xia] H;Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, China<&wdkj&>Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, China
摘要：
The integration of artificial intelligence (AI) in the food industry has driven significant advancements in efficiency, safety, and sustainability. This review assesses the current state and future prospects of AI applications in key areas such as food traceability, safety, quality control, supply chain optimization, and intelligent packaging solutions. AI technologies, including machine learning (ML) algorithms and computer vision systems, are widely used to optimize supply chains, predict demand, reduce waste, and enhance food safety and quality monitoring. Advanced ML models are employed to analyze production data, monitor quality parameters, and predict shelf life, ensuring compliance with stringent regulatory standards. Despite these advancements, challenges related to data quality, system integration, computational demands, and ethical considerations remain, necessitating further research and collaboration among stakeholders. This review aims to elucidate these challenges while highlighting the transformative potential of AI in the food industry. By synthesizing recent developments and trends, this paper provides valuable insights for researchers, industry professionals, and policymakers, underscoring the pivotal role of AI in driving innovation and sustainability in the food sector.
期刊：
Separation and Purification Technology,2025年:135410 ISSN：1383-5866
通讯作者：
Haoyu Bai
作者机构：
[Zhixin Wang; Yanhui Miao; Yunliang Zhao] School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei 430070, China;[Sizhe Lai; Hailan Guo] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China;Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom;[Tingting Zhang] School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei 430070, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China;[Haoyu Bai] School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei 430070, China<&wdkj&>Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom
通讯机构：
[Haoyu Bai] S;School of Resources and Environmental Engineering, Wuhan University of Technology, Wenzhi Street 34, Wuhan, Hubei 430070, China<&wdkj&>Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom
摘要：
Arsenic (As) pollution in aqueous environments is a critical environmental issue that need to be carefully addressed. This work presents a phase-selective strategy for the in situ formation of polymorphic FeO(OH) species on mechanically activated carbonate minerals to optimize As coprecipitation. Calcite (CaCO 3 ) and dolomite (CaMg(CO 3 ) 2 ) were mechanically activated to promote sustained CO 3 2− release, OH − generated by CO 3 2− hydrolysis can elevate pH values and create alkaline microenvironment facilitating in situ Fe(II) hydrolysis. Mechanical activation is validated to reduce the activation energy and Gibbs free energy of carbonate minerals and accelerate the thermodynamic-favourable oxidation of Fe(II) into Fe(III) oxyhydroxides species. The activated carbonate minerals with sustainedly formed fresh FeO(OH) exhibit superior As removal performance compared to the raw carbonate minerals. Notably, the distinct Fe(II) hydrolysis kinetics on mechanically activated calcite and dolomite induce a corresponding phase-selective formation of FeO(OH) polymorphs. Metastable γ-FeO(OH) (lepidocrocite) with platelet morphology preferentially formed on activated calcite under moderate alkalinity, while α-FeO(OH) (goethite) with needle-like morphology was dominant on activated dolomite, driven by its higher CO 3 2− release and stronger alkalinity. This work demonstrates a kinetically tunable strategy for FeO(OH) phase engineering via mechanical activation, offering new insights into optimized As remediation through the ferric coprecipitation method.
Arsenic (As) pollution in aqueous environments is a critical environmental issue that need to be carefully addressed. This work presents a phase-selective strategy for the in situ formation of polymorphic FeO(OH) species on mechanically activated carbonate minerals to optimize As coprecipitation. Calcite (CaCO 3 ) and dolomite (CaMg(CO 3 ) 2 ) were mechanically activated to promote sustained CO 3 2− release, OH − generated by CO 3 2− hydrolysis can elevate pH values and create alkaline microenvironment facilitating in situ Fe(II) hydrolysis. Mechanical activation is validated to reduce the activation energy and Gibbs free energy of carbonate minerals and accelerate the thermodynamic-favourable oxidation of Fe(II) into Fe(III) oxyhydroxides species. The activated carbonate minerals with sustainedly formed fresh FeO(OH) exhibit superior As removal performance compared to the raw carbonate minerals. Notably, the distinct Fe(II) hydrolysis kinetics on mechanically activated calcite and dolomite induce a corresponding phase-selective formation of FeO(OH) polymorphs. Metastable γ-FeO(OH) (lepidocrocite) with platelet morphology preferentially formed on activated calcite under moderate alkalinity, while α-FeO(OH) (goethite) with needle-like morphology was dominant on activated dolomite, driven by its higher CO 3 2− release and stronger alkalinity. This work demonstrates a kinetically tunable strategy for FeO(OH) phase engineering via mechanical activation, offering new insights into optimized As remediation through the ferric coprecipitation method.
通讯作者：
Min Tu<&wdkj&>Guangyuan He<&wdkj&>Yin Li<&wdkj&>Guangxiao Yang
作者机构：
[Chen, Mingjie; Chang, Junli] The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan 430074, China;These authors contributed equally to this work.;Authors to whom correspondence should be addressed.;Hubei Province Key Laboratory of Agricultural Waste Resource Utilization, Hubei Technical Engineering Research Center for Chemical Utilization and Engineering Development of Agricultural and Byproduct Resources, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Shi, Fu; Li, Li] The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan 430074, China<&wdkj&>These authors contributed equally to this work.
通讯机构：
[Min Tu] A;[Guangyuan He; Yin Li; Guangxiao Yang] T;The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan 430074, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>Hubei Province Key Laboratory of Agricultural Waste Resource Utilization, Hubei Technical Engineering Research Center for Chemical Utilization and Engineering Development of Agricultural and Byproduct Resources, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China
关键词：
calcium-dependent protein kinases;CPKs and their related kinases;Oryza;duplicated gene;EF-hand motifs;transcriptome analysis
摘要：
The Oryza genus serves not only as a gene pool for rice improvement but also as a model system for plant evolutionary research. Calcium-dependent protein kinases (CPKs) function as both effectors and sensors in calcium signaling and play versatile roles in plant development and stress responses. Four kinase families, namely CPK-related kinases (CRKs), phosphoenolpyruvate carboxylase kinases (PPCKs), PPCK-related kinases (PEPRKs), and calcium- and calmodulin-dependent kinases (CCaMKs), are frequently called CPK-related kinases. This study utilized evolutionary genomics approaches and provided the pan-genome repertoires of CPKs and their related kinases in 34 Oryza genomes by leveraging the rich genomics resources of the Orzya genus. Gene duplication analysis revealed that distinct duplication types contributed to expanding CPKs and their related kinases in wild rice. We depicted the protein domain architectures of CPKs and their related kinases, highlighting the complexity of EF-hand motifs in CPKs and CCaMKs. Transcriptome analysis determined that alternative splicing was a mechanism contributing to the diversity in the domain architectures of CPKs and CCaMKs. We also generated the expression atlas of CPKs and their related kinases in multiple species of Oryza genus, emphasizing divergent homoeolog expression patterns across tissues and species in allotetraploid wild rice. Collectively, our Oryza-wide analysis of CPKs and their related kinases revealed their evolutionary trajectories and highlighted their diversified domain architectures and expression dynamics, providing gene resources of wild relatives for rice improvement.
摘要：
<div class="mag_zhaiyao_sec"><p id="Par1" class="mag_zhaiyao_p">Cell migration is a fundamental biological process that plays a crucial role in both physiological and pathological conditions, and is largely influenced by the complex microenvironment, particularly the extracellular matrix (ECM), a macromolecular network that governs various cellular interactions. Extensive research has established that ECM-cell interactions are critical in multiple biological processes, with some directly regulating cell migration. Among ECM components, collagens stand out as key regulators of cell movement. However, existing reviews have provided only limited perspectives on the role of collagen-based biomaterials in directing migration across different cell populations. This gap in knowledge hinders a comprehensive understanding of collagen’s full potential. Drawing from systematic literature and our ongoing research, this review aims to summarize advancements over the past five years in the application of collagen-based biomaterials for modulating cell migration. The discussion primarily focuses on three pivotal cell types: stem cells, immune cells, and cancer cells. By shedding light on the functions, mechanisms, and therapeutic potential of collagen in cell migration, this review will contribute to the development of innovative collagen-based biomaterials with applications in wound healing and tissue regeneration.</div>
关键词：
Isothiocyanate terphenyl and phenyl tolane;liquid crystals;low dielectric loss;electrostatic potential;microwave
摘要：
Nematic liquid crystals are advantageous for microwave communication due to their tunable dielectric properties and broad frequency range. However, the relationship between the lateral substituents of liquid crystal compounds and their dielectric behaviour, especially dielectric loss, requires further investigation. In this study, two series of new high birefringent isothiocyanate phenyl tolane (A1-A5) and isothiocyanate terphenyl (B1-B5) liquid crystals with lateral methyl or fluorine substitutions were synthesised and characterised. Dielectric properties in the 9-31 GHz frequency range, as well as mesomorphic behaviour, were assessed. The findings revealed that compound A5, featuring 2,6-difluorine substitutions on the P2 and P3 phenyl rings of isothiocyanate phenyl tolane, exhibited the lowest dielectric loss of 0.00232 (tan delta epsilon r perpendicular to decreases about 64.0%) and a higher material efficiency of 130.172 at 19 GHz (eta increases about 64.4%) compared to reference compound A1 with 2,6-difluorine substitutions on the P3 phenyl ring. DFT calculations revealed a positive correlation between tan delta epsilon r perpendicular to of A1-A5 and B1-B5 and the electrostatic potential at the -NCS end (divided by phi-NCS divided by). In conclusion, this research further advances the design and synthesis of liquid crystal molecules with low dielectric loss and high material efficiency.
摘要：
As a silicon‑aluminum-rich solid waste, granite powder (GP) requires expanded utilization methods to mitigate the environmental impact caused by its storage. Given its compositional similarity to zeolites, non-adsorptive GP can be converted into highly active materials with strong adsorption capacity for heavy metal removal from wastewater. Building upon this potential, this study innovatively employed an alkali-hydrothermal synergistic method to convert GP into zeolite A (GPA) for Cu(II) adsorption in acidic electroplating wastewater. GPA was synthesized by mixing sodium hydroxide and sodium aluminate with GP, followed by calcination and hydrothermal crystallization. The optimal preparation parameters were identified: an alkali-to-GP mass ratio of 0.4, a Si/Al ratio of 1.12, a calcination temperature of 700 °C, and a crystallization time of 4 h. Response surface analysis revealed that the alkali-to-GP mass ratio had the most significant impact on adsorption performance. The results of batch experiments showed that the removal rate of GPA for 100 mg/L Cu(II) solution is 98.79 % at pH 3 and 25 °C. The theoretical maximum adsorption capacity was 134.6 mg/g. The removal mechanism was confirmed by adsorption kinetics and isotherm modeling, and the elimination of Cu(II) by GPA was a synergistic processing effect, which mainly relied on ion exchange (with Na + and H + as the main active sites) and hydroxyl complexation. GPA exhibited significant potential for treating acidic copper-containing electroplating wastewater, providing an efficient and sustainable approach for GP valorization in environmental applications.
As a silicon‑aluminum-rich solid waste, granite powder (GP) requires expanded utilization methods to mitigate the environmental impact caused by its storage. Given its compositional similarity to zeolites, non-adsorptive GP can be converted into highly active materials with strong adsorption capacity for heavy metal removal from wastewater. Building upon this potential, this study innovatively employed an alkali-hydrothermal synergistic method to convert GP into zeolite A (GPA) for Cu(II) adsorption in acidic electroplating wastewater. GPA was synthesized by mixing sodium hydroxide and sodium aluminate with GP, followed by calcination and hydrothermal crystallization. The optimal preparation parameters were identified: an alkali-to-GP mass ratio of 0.4, a Si/Al ratio of 1.12, a calcination temperature of 700 °C, and a crystallization time of 4 h. Response surface analysis revealed that the alkali-to-GP mass ratio had the most significant impact on adsorption performance. The results of batch experiments showed that the removal rate of GPA for 100 mg/L Cu(II) solution is 98.79 % at pH 3 and 25 °C. The theoretical maximum adsorption capacity was 134.6 mg/g. The removal mechanism was confirmed by adsorption kinetics and isotherm modeling, and the elimination of Cu(II) by GPA was a synergistic processing effect, which mainly relied on ion exchange (with Na + and H + as the main active sites) and hydroxyl complexation. GPA exhibited significant potential for treating acidic copper-containing electroplating wastewater, providing an efficient and sustainable approach for GP valorization in environmental applications.
通讯机构：
[Zhang, JT ] W;[Wang, HB ] H;Wuhan Polytech Univ, Sch Chem & Environm Engn, Hubei Prov Key Lab Agr Waste Resource Utilizat, Wuhan, Hubei, Peoples R China.;Hubei Engn Univ, Coll Life Sci & Technol, Hubei Key Lab Qual Control Characterist Fruits & V, Xiaogan, Hubei, Peoples R China.
关键词：
Collagen;Hydrophilicity;Hemostasis
摘要：
Understanding the structure-function relationships is critical for the design of collagen-based hemostatic materials. Chemical modification enables researchers to manipulate protein structures, which can significantly alter surface properties (such as hydrophilicity and hydrophobicity) as well as functional characteristics. In this study, the hydrophilicity of collagen was regulated via succinylation and acrylylation, and the impact of collagen hydrophilicity on its hemostatic performance was explored. The structural and physicochemical properties of succinylated collagen (SASC) and acrylylated collagen (AASC) were characterized using TNBS, CD, FTIR, zeta potential titration, and contact angle analysis. Evaluations of the blood compatibility and in vitro hemostatic performances of SASCs and AASCs demonstrated that succinylation could enhance both the hemostatic performance of collagen and its interaction with platelets. All-atom molecular dynamics (MD) simulations revealed that succinylation of collagen can significantly strengthen its interaction with integrin while preserving the stability of the triple helix structure. Subsequently, SASC(62), which exhibited the optimal in vitro hemostatic performance, was selected for comparison with ASC to verify its superior properties as a hemostatic material and wound dressing. These results indicated that SASC(62) possessed comparable cellular compatibility and wound healing functionality to natural collagen, while effectively reducing inflammatory cell infiltration and promoting re-epithelialization and collagen deposition. This study is expected to provide valuable insights for the design of novel collagen-bioconjugate-based hemostatic materials.
Understanding the structure-function relationships is critical for the design of collagen-based hemostatic materials. Chemical modification enables researchers to manipulate protein structures, which can significantly alter surface properties (such as hydrophilicity and hydrophobicity) as well as functional characteristics. In this study, the hydrophilicity of collagen was regulated via succinylation and acrylylation, and the impact of collagen hydrophilicity on its hemostatic performance was explored. The structural and physicochemical properties of succinylated collagen (SASC) and acrylylated collagen (AASC) were characterized using TNBS, CD, FTIR, zeta potential titration, and contact angle analysis. Evaluations of the blood compatibility and in vitro hemostatic performances of SASCs and AASCs demonstrated that succinylation could enhance both the hemostatic performance of collagen and its interaction with platelets. All-atom molecular dynamics (MD) simulations revealed that succinylation of collagen can significantly strengthen its interaction with integrin while preserving the stability of the triple helix structure. Subsequently, SASC(62), which exhibited the optimal in vitro hemostatic performance, was selected for comparison with ASC to verify its superior properties as a hemostatic material and wound dressing. These results indicated that SASC(62) possessed comparable cellular compatibility and wound healing functionality to natural collagen, while effectively reducing inflammatory cell infiltration and promoting re-epithelialization and collagen deposition. This study is expected to provide valuable insights for the design of novel collagen-bioconjugate-based hemostatic materials.
摘要：
In this study, thermal and calcium oxide (CaO) pretreatment were used as a strategy to improve the performance of the anaerobic digestion of food waste. Meanwhile, the carbon emissions among the two strategies were evaluated. The results showed that both the two strategies could effectively promote the solubilization of organic matter in food waste and improve the hydrolysis rate of anaerobic digestion, which resulted in an increase of the methane yield. The highest methane yield (284.4 mL/g VS) was obtained in the group pretreated with 1.0 g/L CaO, which was increased by 23.8% compared with the control group. After the pretreatment, the anaerobic digestion pathway changed from acetotrophic methanogenesis to the co-dominated methanogenesis process by hydrogentrophic and acetotrophic. Meanwhile, CaO pretreatment had a better performance on the carbon emission which was increased by 23.75% compared with the control group.
摘要：
An organic additive-assisted mechanochemical method was developed to tailor one-electron-trapped oxygen vacancy with a net charge of + 1 (V O • + ) in MnO 2 for peroxymonosulfate (PMS) activation toward fast degradation of aqueous organics. The obtained MnO 2 (bm-MnO 2 /Glu) showed 3.1 and 1.6 times more V O • + sites than pristine MnO 2 (nm-MnO 2 ) and milled MnO 2 (bm-MnO 2 ), respectively. PMS activation with bm-MnO 2 /Glu achieved complete degradation of ofloxacin in real water samples in 10 min with excellent stability. Isotope labelling experiments showed both PMS and lattice oxygen (O L ) of MnO 2 involved in the generation of 1 O 2 as the dominant reactive specie, and water contributed to regenerating O L in MnO 2 . Owing to more V O • + , bm-MnO 2 /Glu presented enhanced PMS adsorption, electric conductivity of MnO 2 and Mn 4+ /Mn 3+ redox reaction , which quantitatively matched to the increasing factor for OFX degradation, justifying the multiple roles of V O • + in improved catalytic performance of MnO 2 .
An organic additive-assisted mechanochemical method was developed to tailor one-electron-trapped oxygen vacancy with a net charge of + 1 (V O • + ) in MnO 2 for peroxymonosulfate (PMS) activation toward fast degradation of aqueous organics. The obtained MnO 2 (bm-MnO 2 /Glu) showed 3.1 and 1.6 times more V O • + sites than pristine MnO 2 (nm-MnO 2 ) and milled MnO 2 (bm-MnO 2 ), respectively. PMS activation with bm-MnO 2 /Glu achieved complete degradation of ofloxacin in real water samples in 10 min with excellent stability. Isotope labelling experiments showed both PMS and lattice oxygen (O L ) of MnO 2 involved in the generation of 1 O 2 as the dominant reactive specie, and water contributed to regenerating O L in MnO 2 . Owing to more V O • + , bm-MnO 2 /Glu presented enhanced PMS adsorption, electric conductivity of MnO 2 and Mn 4+ /Mn 3+ redox reaction , which quantitatively matched to the increasing factor for OFX degradation, justifying the multiple roles of V O • + in improved catalytic performance of MnO 2 .
期刊：
Journal of Materials Chemistry A,2025年13(31):25489-25497 ISSN：2050-7488
通讯作者：
Zhang, Lingjie;Zhao, YL;Zhang, LJ
作者机构：
[Zhang, Lingjie; Yan, Jianglin; Song, Shaoxian; Zhao, Yunliang; Huang, Lianqiu; Jiang, Xiongrui; Chen, Licai; Zhao, YL; Wang, Zhenlei] Wuhan Univ Technol, Sch Resources & Environm Engn, Wenzhi St 34, Wuhan 430070, Hubei, Peoples R China.;[Zhang, Lingjie; Quintana, Mildred; Meza, Viridiana Garcia; Wang, Zhenlei] Univ Autonoma San Luis Potosi, Fac Ciencias, Ave Parque Chapultepec 1570, San Luis Potosi 78210, Mexico.;[Zhang, Tingting] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Sarocchi, Damiano; Wang, Zhenlei] Univ Autonoma San Luis Potosi, Fac Ingn, Inst Geol, Ave Parque Chapultepec 1570, San Luis Potosi 78210, Mexico.;[Zhao, Yunliang; Zhao, YL] Wuhan Clayene Technol Co Ltd, Tangxunhu North Rd 36, Wuhan 430223, Hubei, Peoples R China.
通讯机构：
[Zhang, LJ; Zhao, YL ] W;[Zhang, LJ ] U;Wuhan Univ Technol, Sch Resources & Environm Engn, Wenzhi St 34, Wuhan 430070, Hubei, Peoples R China.;Univ Autonoma San Luis Potosi, Fac Ciencias, Ave Parque Chapultepec 1570, San Luis Potosi 78210, Mexico.;Wuhan Clayene Technol Co Ltd, Tangxunhu North Rd 36, Wuhan 430223, Hubei, Peoples R China.
摘要：
Driven by the boosted demand for energy storage and conversion devices, highly conductive proton exchange membranes (PEMs) are extremely desired. Assembling atomically thin nanosheets into nanofluidic channels represents one promising way to construct high-performance PEMs. However, how to produce ultra-aligned nanofluidic channels in a universal and scalable manner is still challenging. Here, we report a dual-constrained assembly strategy to fabricate two-dimensional (2D) montmorillonite (MMT) membranes with highly ordered nanochannels and fast proton transport through confined modification with sulfonated polyvinyl alcohol (SPVA). The numerous polar functional groups with rich lone pair electrons of SPVA enabled nanosheets to feature more negative charges and additional proton carriers, improving the spatial orientation degree of nanosheet dispersion via the electrostatic confinement effect. The hydrogen bond interaction between SPVA and nanosheets offered a unique capillary force compensation effect to constrain nanochannel disordering during water removal. Consequently, the SPVA-modified MMT membrane presented significantly enhanced alignment of nanochannels, endowing it with ultra-high proton conductivity (134.58 mS cm −1 ), ultra-low activation energy (9.19 kJ mol −1 ), and excellent stability. This work provides a facile and general strategy for constructing high-performance PEMs, and opens an avenue for the development and design of highly aligned lamellar membranes.
