期刊：
Separation and Purification Technology,2025年354:128695 ISSN：1383-5866
通讯作者：
Xiaofeng Wu<&wdkj&>Kangle Lv
作者机构：
[Yu, Mengxue; Chang, Shixin; Ma, Liang; Ding, Yaobin; Zhang, Xue; Lv, Kangle] Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South−Central Minzu University, Wuhan 430074, China;[Yan, Juntao] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Sónia A.C. Carabineiro] LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal;[Wu, Xiaofeng] Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South−Central Minzu University, Wuhan 430074, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China
通讯机构：
[Xiaofeng Wu; Kangle Lv] K;Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South−Central Minzu University, Wuhan 430074, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, College of Resources and Environment, South−Central Minzu University, Wuhan 430074, China
摘要：
The nitrogen oxide emissions originating from combustion pose significant risks to the environment. Photocatalysis is considered an efficient and environmentally friendly strategy to alleviate this problem. Graphitic carbon nitride (g-C3N4) is regarded as one of the most promising organic photocatalytic materials for environmental purification. However, its small specific surface area, weak adsorption and high recombination rate of charge carriers result in low intrinsic photocatalytic activity. To overcome these obstacles, a hydrothermal treatment of dicyandiamide-derived g-C3N4 (DCN) at different temperatures (140–200 °C) was employed to enhance the photocatalytic activity for NO oxidation. The experimental results demonstrated a significant improvement in the photocatalytic oxidation removal rate of NO after a hydrothermal treatment. The optimal photocatalyst, DCN-180, treated at 180 °C, demonstrated the highest NO removal efficiency (65.0 %), which is twice the value of pristine DCN (32.5 %). Additionally, the formation of the toxic intermediate NO2 was effectively suppressed during the reaction. Photoelectrochemical tests revealed that DCN-180 exhibited higher photocurrent density and smaller impedance radius compared to the untreated g-C3N4 sample. Moreover, density functional theory (DFT) calculations confirmed that the DCN-180 sample showed a stronger ability to adsorb O2 and NO. The enhanced photocatalytic NO oxidation performance of DCN-180 has been primarily attributed to its enlarged specific surface area (from 10.7 to 35.5 m2 g−1), local polarization effect, reduced interfacial charge transfer resistance, and improved adsorption abilities for NO and O2 molecules. This study provides valuable insights for designing and preparing highly efficient g-C3N4 based photocatalysts through surface modification for photocatalytic NO purification.
The nitrogen oxide emissions originating from combustion pose significant risks to the environment. Photocatalysis is considered an efficient and environmentally friendly strategy to alleviate this problem. Graphitic carbon nitride (g-C3N4) is regarded as one of the most promising organic photocatalytic materials for environmental purification. However, its small specific surface area, weak adsorption and high recombination rate of charge carriers result in low intrinsic photocatalytic activity. To overcome these obstacles, a hydrothermal treatment of dicyandiamide-derived g-C3N4 (DCN) at different temperatures (140–200 °C) was employed to enhance the photocatalytic activity for NO oxidation. The experimental results demonstrated a significant improvement in the photocatalytic oxidation removal rate of NO after a hydrothermal treatment. The optimal photocatalyst, DCN-180, treated at 180 °C, demonstrated the highest NO removal efficiency (65.0 %), which is twice the value of pristine DCN (32.5 %). Additionally, the formation of the toxic intermediate NO2 was effectively suppressed during the reaction. Photoelectrochemical tests revealed that DCN-180 exhibited higher photocurrent density and smaller impedance radius compared to the untreated g-C3N4 sample. Moreover, density functional theory (DFT) calculations confirmed that the DCN-180 sample showed a stronger ability to adsorb O2 and NO. The enhanced photocatalytic NO oxidation performance of DCN-180 has been primarily attributed to its enlarged specific surface area (from 10.7 to 35.5 m2 g−1), local polarization effect, reduced interfacial charge transfer resistance, and improved adsorption abilities for NO and O2 molecules. This study provides valuable insights for designing and preparing highly efficient g-C3N4 based photocatalysts through surface modification for photocatalytic NO purification.
摘要：
Lignin is the only natural polymer compound containing a benzene ring on earth, and its conversion to monophenolic compounds is attracting more attention. Cu-dopped CuCo 2 O 4 is synthesized and further used to catalyze the oxidative conversion of lignin to monophenolic compounds. It is found that the conversion of lignin is affected by the molar ratio of Cu to Co, the amounts of catalyst and H 2 O 2 , reaction temperature and time, and CuCo 2 O 4 exhibits excellent catalytic performance. Under the optimized reaction conditions, the total yield of monophenolic compounds reaches 21.7%. CuCo 2 O 4 also possesses good recyclable performance, and the total yield of monophenolic compounds slightly drops to 17.6% after four cycles. A plausible mechanism for the conversion of lignin to monophenolic compounds is proposed. During the depolymerization of lignin, C O and C C bonds are broken to form monophenols. This work provides an effective catalyst for the conversion of lignin to monophenol and expands the way of high-value utilization of biomass.
摘要：
Holocellulose laurate (HC-L) was prepared by the esterification of holocellulose with lauric acid, and then was further melt-blended with poly(butylene adipate-co-terephthalate) (PBAT) and polylactic acid (PLA) to obtain a biodegradable HC-L/PBAT/PLA composite. Compared with those of the PBAT/PLA matrix, the comprehensive properties, including the thermal properties, water stability, gas barrier properties and degradation properties of HC-L/PBAT/PLA with 5 wt% HC-L were improved. The elongation at break and 90-d biodegradation rates increased by 64% and 11.0%, respectively. The water absorption capacity, water vapor transmission and oxygen permeability decreased by 60%, 18.6%, and 33.2%, respectively, and the water contact angle increased from 91.9 degrees to 112 degrees. The elongation at break, thermal stability, water stability and gas barrier properties of HC-L/PBAT/PLA were superior to those of a commercial bio-based pallet. The results showed that modified holocellulose can be used as a filler in biodegradable composites, expanding the utilization of lignocellulosic resources in the packaging field.
通讯机构：
[Liu, P ; Liu, Y ; Liu, P] T;TianGong Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China.;Tiangong Univ, Sch Chem, Tianjin 300387, Peoples R China.;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;Tiangong Univ, Cangzhou Inst, Cangzhou 061000, Peoples R China.
摘要：
Correction for ‘Potentiating light-harvesting tactics through an A–D–A structure: repolarization of tumor-associated macrophages through phototherapy’ by Pai Liu et al. , J. Mater. Chem. B , 2024, 12 , 7870–7878, https://doi.org/10.1039/D4TB00814F.
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.
通讯机构：
[Pan, C ] W;[Yang, HT ] H;Hubei Univ Technol, Hubei Prov Key Lab Green Mat Light Ind, Wuhan 430068, Peoples R China.;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
摘要：
To extend the applications of phase-change materials to multiple scenarios, Fe 3 O 4 nanoparticles were deposited on the surface of mica with a layer-like structure using a simple method, and composite phase-change materials (CPCMs) with dual-driven energy conversion performance were subsequently obtained via vacuum impregnation. The addition of boron nitride (BN) and cellulose nanofibers (CNFs) endowed the CPCMs with higher thermal conductivity (0.85 W m −1 K −1 ) and lower specific heat capacity (1.42 MJ m −2 K −1 ), thereby constructing an effective heat transfer channel. The photothermal conversion efficiency of the CPCMs reached up to 88.36%. The magnetic Fe 3 O 4 nanoparticles endowed the CPCMs with magnetic responsiveness, enabling the phase transition process to complete within just 112 s under a magnetic field. With a high phase-change material loading (82.65%), the CPCMs maintained excellent thermal stability during the energy conversion process. These results provide guidance for the preparation of CPCMs with multiple types of efficient energy conversion.
To extend the applications of phase-change materials to multiple scenarios, Fe 3 O 4 nanoparticles were deposited on the surface of mica with a layer-like structure using a simple method, and composite phase-change materials (CPCMs) with dual-driven energy conversion performance were subsequently obtained via vacuum impregnation. The addition of boron nitride (BN) and cellulose nanofibers (CNFs) endowed the CPCMs with higher thermal conductivity (0.85 W m −1 K −1 ) and lower specific heat capacity (1.42 MJ m −2 K −1 ), thereby constructing an effective heat transfer channel. The photothermal conversion efficiency of the CPCMs reached up to 88.36%. The magnetic Fe 3 O 4 nanoparticles endowed the CPCMs with magnetic responsiveness, enabling the phase transition process to complete within just 112 s under a magnetic field. With a high phase-change material loading (82.65%), the CPCMs maintained excellent thermal stability during the energy conversion process. These results provide guidance for the preparation of CPCMs with multiple types of efficient energy conversion.
关键词：
Thin-film nanocomposite membrane;Montmorillonite nanosheets;Interlayer;Carbon nanotubes;Separation of Li+ and Mg2+
摘要：
A membrane for fast and efficient separation of Li + and Mg 2+ was successfully prepared by constructing a thin montmorillonite nanosheets (MMTNS) interlayer with carbon nanotubes (CNTs) onto PES substrate. The introduction of MMTNS interlayer decreased the thickness of polyamide layer formed between polyethyleneimine and trimesoyl chloride as well as improved the hydrophilicity of membrane. CNTs expanded the interlayer spacing of MMTNS interlayer and shortened the length of water channels. The optimal CNTs/MMTNS/PA membrane demonstrated high Li + /Mg 2+ separation performance with a selectivity of 20.71, and exhibited a permeability of 22.45 L m −2 h −1 , nearly double that of MMTNS/PA membrane.
A membrane for fast and efficient separation of Li + and Mg 2+ was successfully prepared by constructing a thin montmorillonite nanosheets (MMTNS) interlayer with carbon nanotubes (CNTs) onto PES substrate. The introduction of MMTNS interlayer decreased the thickness of polyamide layer formed between polyethyleneimine and trimesoyl chloride as well as improved the hydrophilicity of membrane. CNTs expanded the interlayer spacing of MMTNS interlayer and shortened the length of water channels. The optimal CNTs/MMTNS/PA membrane demonstrated high Li + /Mg 2+ separation performance with a selectivity of 20.71, and exhibited a permeability of 22.45 L m −2 h −1 , nearly double that of MMTNS/PA membrane.
通讯机构：
[Hu, C ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
关键词：
Agricultural carbon emissions;Spatial spillover effect;Super-SBM model;Yangtze River economic belt
摘要：
Researching the agricultural carbon emission efficiency (ACEE) of the Yangtze River Economic Belt (YEB) has significant theoretical and policy implications for promoting high− quality agricultural development and achieving China’s “dual carbon” goals. Based on the agricultural generation panel data from the YEB spanning 2001 to 2021, the Super-SBM model for undesirable outputs is employed to calculate the ACEE for 11 provinces and cities. Additionally, kernel density estimation and Moran’s I index are utilized to analyze the temporal and spatial evolution characteristics of ACEE. Furthermore, a spatial Durbin model is applied to investigate the key factors influencing ACEE in the YEB and their spatial spillover effects. Empirical results indicate that from 2001 to 2021, the ACEE within the YEB has demonstrated a fluctuating upward trend, with significant geographical disparities among the provinces and cities along the route. In terms of spatial distribution, ACEE is characterized by a pattern of downstream > midstream > upstream, reflecting an overall trend of “higher in the east and lower in the west, and the ACEE in the YEB exhibits characteristics of spatial aggregation. ACEE exhibits a significant positive spatial spillover effect in theYEB. Key factors influencing the enhancement of ACEE include the level of mechanization and the agricultural industrial structure. Conversely, the use of pesticides serves as the primary constraint hindering the improvement of ACEE. Based on the research findings, policy recommendations have been proposed to promote green, low-carbon agriculture and enhance high-quality agricultural development in the YEB.
摘要：
Dual-co-catalyst-modified photocatalysts enhance charge separation efficiency, but the traditional dual co-catalyst is still difficult to get a high separation efficiency due to size and aggregation. Herein, we report bimetallic MIL-53(Fe/Mn) as dual co-catalysts with separate electron and hole mediators. CdS NPs were in-situ grown into MIL-53(Fe/Mn) at varying ratios. 20 %CdS/MIL-53(Fe/Mn) composites shown optimum photocatalytic CO 2 reduction activity. The XPS results shown the strong interaction between CdS and MIL-53(Fe/Mn). The EPR measure proved the carriers of CdS can be transferred to MIL-53(Fe/Mn) oxidation cluster by the oxo-Fe(III)/Fe(II) and oxo-Mn(II)/Mn(III) redox cycling, and the results also suggest the oxo-Fe(III) and oxo-Mn(II) were redox active sites. We believe the approach that bimetallic MOFs act as dual cocatalyst to improve the photocatalytic activity would open a new avenue for the separation efficiency of photo-generated charge carriers.
Dual-co-catalyst-modified photocatalysts enhance charge separation efficiency, but the traditional dual co-catalyst is still difficult to get a high separation efficiency due to size and aggregation. Herein, we report bimetallic MIL-53(Fe/Mn) as dual co-catalysts with separate electron and hole mediators. CdS NPs were in-situ grown into MIL-53(Fe/Mn) at varying ratios. 20 %CdS/MIL-53(Fe/Mn) composites shown optimum photocatalytic CO 2 reduction activity. The XPS results shown the strong interaction between CdS and MIL-53(Fe/Mn). The EPR measure proved the carriers of CdS can be transferred to MIL-53(Fe/Mn) oxidation cluster by the oxo-Fe(III)/Fe(II) and oxo-Mn(II)/Mn(III) redox cycling, and the results also suggest the oxo-Fe(III) and oxo-Mn(II) were redox active sites. We believe the approach that bimetallic MOFs act as dual cocatalyst to improve the photocatalytic activity would open a new avenue for the separation efficiency of photo-generated charge carriers.
通讯机构：
[Zhang, L ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
摘要：
Diffusion dialysis (DD) with anion exchange membranes (AEMs) as the core component is an ideal technology for acid recovery from acidic wastewater. Herein, a series of TEA–BPPO AEMs were prepared from triethanolamine (TEA) and brominated polyphenylene ether (BPPO) using the solution casting method. The structures of the prepared membranes were characterized and analyzed through nuclear magnetic resonance hydrogen spectroscopy ( 1 H NMR), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). In addition, the properties of the membranes, such as ion exchange capacity (IEC), linear swelling rate (LSR), water uptake ( W U ), chemical stability, thermal stability and mechanical stability, were explored. In DD experiments, the optimal AEM ( i.e. , TEA–BPPO–M80) applied to simulate acid recovery from a mixed HCl (1 mol L −1 )/FeCl 2 (0.2 mol L −1 ) solution exhibited an acid dialysis coefficient ( U H + ) of 0.0629 m h −1 and separation factor ( S ) of 97.78, which were significantly better than those of the commercial membrane DF-120. In addition, the TEA–BPPO–M80 AEM exhibited excellent thermal stability and acid resistance. In summary, the prepared membranes possess great potential for application in DD acid recovery.
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.
期刊：
Journal of Coatings Technology and Research,2025年:1-9 ISSN：1935-3804
通讯作者：
Yan Xu<&wdkj&>Xiaoming Tan
作者机构：
[Qinyi Liu; Yan Xu; Xiaoming Tan; Man Zhang; Tao Fang] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan City, China;[Jiaxuan He] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan City, China
通讯机构：
[Yan Xu; Xiaoming Tan] S;School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan City, China<&wdkj&>School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan City, China
摘要：
The synthesis of dimethylaminopropylmethacrylamide-benzylammonium chloride (QD-BC), a kind of acrylamide quaternary ammonium salt, through the combination of N-dimethylamine propyl methacrylamide and benzyl chloride (BC) is presented in this paper. The structure of QD-BC was analyzed using FTIR, carbon spectrum, mass spectrometry and 1HNMR spectroscopy. The resulting product was then utilized for the preparation of light-cured antimicrobial coatings. The mechanical properties of the light-cured coatings were evaluated through drawing tests, etc. The antimicrobial efficacy of coatings with varying contents of QD-BC against E. coli and S. aureus was investigated. The results indicate that the coating with the QD-BC content of 7.2% exhibits maximum adhesion strength, reaching 0.87 MPa. Moreover, when the QD-BC content is 6%, the coating displays a hardness value of 5H while maintaining good flexibility throughout all formulations tested. The coating with QD-BC content of 7.5% shows the highest impact strength among all compositions studied. Furthermore, at respective concentrations of 7.5% and 4.2% for the E. coli and S. aureus testing strains, these coatings demonstrate complete antimicrobial activity with exceptional durability.
摘要：
Constructing non-noble metal-based electrocatalysts supported on heteroatom-doped porous carbon materials with robust and enduring electrocatalytic activities for the oxygen reduction/evolution reactions (ORR/OER) is essential for propelling advancements in energy-related technologies. In this study, Co 2 P nanoparticles and Fe-N x sites embedded N, P co-doped micro-/meso-/macroporous graphitized carbon nanosheets (Co 2 P/Fe-N x @NPC) catalyst was designed via an eco-friendly phytic acid (PA)-assisted phosphidation strategy. Its synthesis involved PA-etching two-dimensional Core@shell leaf-like zeolitic imidazolium frameworks (Fe-ZIF-L@Zn/Co-ZIF-L) precursor and pyrolysis. PA not only acts as an etching agent but also is a phosphorus source for the formation of P-doping and Co 2 P. The leaf-like core-shell morphology, high surface area and excellent pore structure of graphitized carbon nanosheets facilitated the surface electron transfer and the diffusion of reactive species. Notably, the resulting Co 2 P/Fe-N x @NPC catalyst exhibited remarkable activity in both ORR (E 1/2 = 0.835 V) and OER (η 10 = 0.310 V). The theoretical investigations reveal that the synergistic effect of Fe-N 4 sites and Co 2 P nanoparticles optimized ORR intermediates adsorption and accelerated the reaction kinetics. Moreover, its bifunctional activity parameter (ΔE) for ORR and OER was only 0.705 V, which was lower than Pt/C+RuO 2 catalyst (0.715 V). This study demonstrates an effective strategy to develop ZIF-L-derived catalysts with good morphology and dual active sites.
Constructing non-noble metal-based electrocatalysts supported on heteroatom-doped porous carbon materials with robust and enduring electrocatalytic activities for the oxygen reduction/evolution reactions (ORR/OER) is essential for propelling advancements in energy-related technologies. In this study, Co 2 P nanoparticles and Fe-N x sites embedded N, P co-doped micro-/meso-/macroporous graphitized carbon nanosheets (Co 2 P/Fe-N x @NPC) catalyst was designed via an eco-friendly phytic acid (PA)-assisted phosphidation strategy. Its synthesis involved PA-etching two-dimensional Core@shell leaf-like zeolitic imidazolium frameworks (Fe-ZIF-L@Zn/Co-ZIF-L) precursor and pyrolysis. PA not only acts as an etching agent but also is a phosphorus source for the formation of P-doping and Co 2 P. The leaf-like core-shell morphology, high surface area and excellent pore structure of graphitized carbon nanosheets facilitated the surface electron transfer and the diffusion of reactive species. Notably, the resulting Co 2 P/Fe-N x @NPC catalyst exhibited remarkable activity in both ORR (E 1/2 = 0.835 V) and OER (η 10 = 0.310 V). The theoretical investigations reveal that the synergistic effect of Fe-N 4 sites and Co 2 P nanoparticles optimized ORR intermediates adsorption and accelerated the reaction kinetics. Moreover, its bifunctional activity parameter (ΔE) for ORR and OER was only 0.705 V, which was lower than Pt/C+RuO 2 catalyst (0.715 V). This study demonstrates an effective strategy to develop ZIF-L-derived catalysts with good morphology and dual active sites.
作者机构：
[Quan, Fengjiao; Li, Jianfen; He, Yun; Shen, Wenjuan; Xu, Pengfei; Chen, Xiaolan] College of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Zhan, Guangming] School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;[Jia, Falong] College of Chemistry, Central China Normal University, Wuhan 430079, China. Electronic address: fljia@ccnu.edu.cn
通讯机构：
[Falong Jia] C;College of Chemistry, Central China Normal University, Wuhan 430079, China
摘要：
This study compares the isothermal crystallization kinetics of nascent less-entangled UHMWPE ( PE_30°C_60min , synthesized via 5F-BAOFI/MAO) with conventional highly entangled C-UHMWPE of similar molecular weight. Avrami kinetic and Lauritzen-Hoffman analysis revealed that chain entanglement density critically governs crystallization behavior. The less-entangled PE_30°C_60min demonstrated superior crystallizability, evidenced by more crystalline domains in longer crystallization times compared to C-UHMWPE. Lauritzen-Hoffman calculations quantified interfacial energy differences: PE_30°C_60min exhibited a lower free energy of fold surface ( σ e = 8.16 × 10 -2 J ‧ m -2 ) compared to C-UHMWPE ( σ e = 0.11 J ‧ m -2 ), confirming that reduced chain entanglement enhances crystal growth kinetics. These results establish that tailored synthesis conditions controlling nascent chain entanglement effectively modulate UHMWPE crystallization kinetics and material properties.
This study compares the isothermal crystallization kinetics of nascent less-entangled UHMWPE ( PE_30°C_60min , synthesized via 5F-BAOFI/MAO) with conventional highly entangled C-UHMWPE of similar molecular weight. Avrami kinetic and Lauritzen-Hoffman analysis revealed that chain entanglement density critically governs crystallization behavior. The less-entangled PE_30°C_60min demonstrated superior crystallizability, evidenced by more crystalline domains in longer crystallization times compared to C-UHMWPE. Lauritzen-Hoffman calculations quantified interfacial energy differences: PE_30°C_60min exhibited a lower free energy of fold surface ( σ e = 8.16 × 10 -2 J ‧ m -2 ) compared to C-UHMWPE ( σ e = 0.11 J ‧ m -2 ), confirming that reduced chain entanglement enhances crystal growth kinetics. These results establish that tailored synthesis conditions controlling nascent chain entanglement effectively modulate UHMWPE crystallization kinetics and material properties.
摘要：
Based on rigid poly (vinyl benzyl chloride) (PVB) and flexible ethylene vinyl alcohol (EVOH) main chains, anion exchange membranes (AEMs) are prepared using the acetal reaction and the Menshutkin reaction. The crosslinking of rigid and flexible backbones, along with the regulation of hydrophilicity/hydrophobicity by fluorinated side chains on EVOH, endows the resulting AEMs with good mechanical properties. The high ionic conductivity of AEMs originates from the effective ionic aggregation morphology, which is generated from the differences between the two main chains and the fluorinated side chains. Their non-polar main chains with stable acetal groups and β-H-free cations contribute to high alkaline stability of AEMs. Specifically, c IM25-TFBA75-EVOH-PVB possesses an ionic conductivity of 148.5 mS cm −1 at 80 °C, with a swelling degree of 12.3 %. The tensile strength and elongation at break of the sample in a fully hydrated state at 25 °C are 7.0 MPa and 12.2 %, respectively. After immersion in 1 M KOH at 80 °C for 1080 h, it almost retains 90 % of its mass, ion exchange capacity, and conductivity. In fuel cells, it achieves peak power densities of 895 mW cm −2 with H 2 /O 2 and 692 mW cm −2 with H 2 /CO 2 -free air at 80 °C.
Based on rigid poly (vinyl benzyl chloride) (PVB) and flexible ethylene vinyl alcohol (EVOH) main chains, anion exchange membranes (AEMs) are prepared using the acetal reaction and the Menshutkin reaction. The crosslinking of rigid and flexible backbones, along with the regulation of hydrophilicity/hydrophobicity by fluorinated side chains on EVOH, endows the resulting AEMs with good mechanical properties. The high ionic conductivity of AEMs originates from the effective ionic aggregation morphology, which is generated from the differences between the two main chains and the fluorinated side chains. Their non-polar main chains with stable acetal groups and β-H-free cations contribute to high alkaline stability of AEMs. Specifically, c IM25-TFBA75-EVOH-PVB possesses an ionic conductivity of 148.5 mS cm −1 at 80 °C, with a swelling degree of 12.3 %. The tensile strength and elongation at break of the sample in a fully hydrated state at 25 °C are 7.0 MPa and 12.2 %, respectively. After immersion in 1 M KOH at 80 °C for 1080 h, it almost retains 90 % of its mass, ion exchange capacity, and conductivity. In fuel cells, it achieves peak power densities of 895 mW cm −2 with H 2 /O 2 and 692 mW cm −2 with H 2 /CO 2 -free air at 80 °C.
作者机构：
["Xiong, Wenjing; Zhang, Yuxin; Fan, Guozhi; Pan, Cheng; Long, Yifei"] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China;[Meng, Jia; Shen, Canduo] Quartermaster Engineering Technology Research Department, Systems Engineering Institute, Academy of Military Sciences of the People's Liberation Army, Beijing 100010, PR China
通讯机构：
[Canduo Shen] Q;[Yifei Long] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China<&wdkj&>Quartermaster Engineering Technology Research Department, Systems Engineering Institute, Academy of Military Sciences of the People's Liberation Army, Beijing 100010, PR China
摘要：
As the increasing demand for food safety, it is crucial to find a safer and more effective method to replace traditional preservation of fruits and vegetables. Electric field preservation, as a novel preservation technology, not only prevents contamination of fresh vegetables, but also mitigates adverse effects on human health. In this paper, comparing conventional refrigeration as a benchmark, the impact of an alternating current electric field (ACEF) on the storage quality of fresh-cut Chinese cabbage and spinach was investigated. The differences in preservation effectiveness were determined by analyzing the changes of quality indicators, nutrients and four microbial indicators (Total Microbiological Numbers, E. coli , Molds, S. aureus ) within 30 days at a storage temperature of 4 °C. The spoilage rates of two fresh-cut vegetables with ACEF were lower compared with those without ACEF, reduced by 30 % and 25 %, respectively. In addition, the weight loss rate of the Chinese cabbage and spinach with ACEF was reduced by 0.10 % and 0.40 %, respectively. Between the two groups, the soluble solids content (SSC) of the Chinese cabbage with ACEF was about 4.93 % higher than without ACEF. On the contrary the SSC of the spinach with ACEF was consistently lower than without ACEF. Meanwhile, vitamin C content of the Chinese cabbage and spinach with ACEF was 4.58 % and 3.95 % higher than that without ACEF, respectively. Moreover, ACEF treatment inhibited microbial growth, resulting in lower levels of total microbiological numbers (9.19 %, 8.96 %), E. coli (12.72 %, 7.55 %), molds (7.88 %, 17.28 %), and S. aureus (10.16 %, 11.50 %) in the Chinese cabbage and spinach compared with those without ACEF treatment. All these results indicated that ACEF could represent an interesting preservation technique, which maintains the freshness of fresh-cut vegetables for a longer period of time.
As the increasing demand for food safety, it is crucial to find a safer and more effective method to replace traditional preservation of fruits and vegetables. Electric field preservation, as a novel preservation technology, not only prevents contamination of fresh vegetables, but also mitigates adverse effects on human health. In this paper, comparing conventional refrigeration as a benchmark, the impact of an alternating current electric field (ACEF) on the storage quality of fresh-cut Chinese cabbage and spinach was investigated. The differences in preservation effectiveness were determined by analyzing the changes of quality indicators, nutrients and four microbial indicators (Total Microbiological Numbers, E. coli , Molds, S. aureus ) within 30 days at a storage temperature of 4 °C. The spoilage rates of two fresh-cut vegetables with ACEF were lower compared with those without ACEF, reduced by 30 % and 25 %, respectively. In addition, the weight loss rate of the Chinese cabbage and spinach with ACEF was reduced by 0.10 % and 0.40 %, respectively. Between the two groups, the soluble solids content (SSC) of the Chinese cabbage with ACEF was about 4.93 % higher than without ACEF. On the contrary the SSC of the spinach with ACEF was consistently lower than without ACEF. Meanwhile, vitamin C content of the Chinese cabbage and spinach with ACEF was 4.58 % and 3.95 % higher than that without ACEF, respectively. Moreover, ACEF treatment inhibited microbial growth, resulting in lower levels of total microbiological numbers (9.19 %, 8.96 %), E. coli (12.72 %, 7.55 %), molds (7.88 %, 17.28 %), and S. aureus (10.16 %, 11.50 %) in the Chinese cabbage and spinach compared with those without ACEF treatment. All these results indicated that ACEF could represent an interesting preservation technique, which maintains the freshness of fresh-cut vegetables for a longer period of time.
摘要：
The metal-organic framework materials ZIF-8 and UiO-66-NH2, synthesized by hydrothermal methods, were characterized in detail and combined to catalyze the transfer hydrogenation of 5-hydroxymethylfurfural (5-HMF) to 2,5-di(hydroxymethyl)furan (2,5-DHMF) using isopropanol as the hydrogen source. The ZIF-8/UiO-66-NH2 catalyst mixture exhibited abundant Lewis acid-base sites and a hierarchical multiporous structure with a large specific surface area (564.0 m2/g). The conversion of 5-HMF reached 98.2 %, and the selectivity and yield of 2,5-DHMF were 96.2 % and 94.5 %, respectively. The recycling performance of ZIF-8/UiO-66-NH2 was also investigated, and the conversion of 5-HMF and selectivity of 2,5-DHMF significantly decreased to 78.4 % and 79.1 % in the second run, respectively. The loss of −NH2 groups was found to be the main reason for the decrease in activity. However, the catalytic activity of the recovered catalyst can be almost completely restored by the addition of a small amount of fresh UiO-66-NH2 and ZIF-8, and the conversion of 5-HMF and selectivity of 2,5-DHMF were increased to 89.4 % and 95.5 %, respectively. In the proposed reaction mechanism, Lewis acid-base sites play important roles and exhibit a synergistic catalytic effect in the selective conversion of 5-HMF to 2,5-DHMF.
The metal-organic framework materials ZIF-8 and UiO-66-NH2, synthesized by hydrothermal methods, were characterized in detail and combined to catalyze the transfer hydrogenation of 5-hydroxymethylfurfural (5-HMF) to 2,5-di(hydroxymethyl)furan (2,5-DHMF) using isopropanol as the hydrogen source. The ZIF-8/UiO-66-NH2 catalyst mixture exhibited abundant Lewis acid-base sites and a hierarchical multiporous structure with a large specific surface area (564.0 m2/g). The conversion of 5-HMF reached 98.2 %, and the selectivity and yield of 2,5-DHMF were 96.2 % and 94.5 %, respectively. The recycling performance of ZIF-8/UiO-66-NH2 was also investigated, and the conversion of 5-HMF and selectivity of 2,5-DHMF significantly decreased to 78.4 % and 79.1 % in the second run, respectively. The loss of −NH2 groups was found to be the main reason for the decrease in activity. However, the catalytic activity of the recovered catalyst can be almost completely restored by the addition of a small amount of fresh UiO-66-NH2 and ZIF-8, and the conversion of 5-HMF and selectivity of 2,5-DHMF were increased to 89.4 % and 95.5 %, respectively. In the proposed reaction mechanism, Lewis acid-base sites play important roles and exhibit a synergistic catalytic effect in the selective conversion of 5-HMF to 2,5-DHMF.
期刊：
Separation and Purification Technology,2025年354:129142 ISSN：1383-5866
通讯作者：
Tingting Zhang<&wdkj&>Zhenlei Wang
作者机构：
[Tan, Shuyang; Zhang, Tingting; Cheng, Cheng; Li, Haiyang] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Zhao, Yunliang] School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;Instituto de Geologia, Facultad de Ingeneria, Universidad Autonoma de San Luis Potosi, Av. Parque Chapultepec 1570, San Luis Potosi 78210, Mexico;[Wang, Zhenlei] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>Instituto de Geologia, Facultad de Ingeneria, Universidad Autonoma de San Luis Potosi, Av. Parque Chapultepec 1570, San Luis Potosi 78210, Mexico
通讯机构：
[Tingting Zhang; Zhenlei Wang] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>Instituto de Geologia, Facultad de Ingeneria, Universidad Autonoma de San Luis Potosi, Av. Parque Chapultepec 1570, San Luis Potosi 78210, Mexico
摘要：
Heavy metals in wastewater have caused serious environmental contamination in the world. However, a key challenge with the most effective solution through chemical precipitation is the high pH of in the effluent by the use of lime. Herein, we propose a strategy using highly active calcium carbonate (HACC) for enhancing its slow-release activity, which efficiently removes heavy metal contamination while avoiding high pH of the effluent. The HACC demonstrate a removal of more than 99 % for Cd(II), Cu(II), Zn(II) and Pb(II) from the composite contaminated water within 50 min, while maintaining the pH of the effluent close to neutral. In addition, mechanistic analyses unveil that the free heavy metals in different solutions combine with OH – and CO 3 2– released from HACC in different precipitation behaviors to form their respective precipitates, thereby discovering the mechanism of regulating the precipitation rates of different heavy metals by controlling the activity of calcium carbonate. Based on it, the stepwise recovery of heavy metals was realized by adjusting the calcium carbonates with different activity. The present work provides guidance for gentle and efficient removal of heavy metal pollution in water bodies and inspires the future development of recovery of heavy metals.
Heavy metals in wastewater have caused serious environmental contamination in the world. However, a key challenge with the most effective solution through chemical precipitation is the high pH of in the effluent by the use of lime. Herein, we propose a strategy using highly active calcium carbonate (HACC) for enhancing its slow-release activity, which efficiently removes heavy metal contamination while avoiding high pH of the effluent. The HACC demonstrate a removal of more than 99 % for Cd(II), Cu(II), Zn(II) and Pb(II) from the composite contaminated water within 50 min, while maintaining the pH of the effluent close to neutral. In addition, mechanistic analyses unveil that the free heavy metals in different solutions combine with OH – and CO 3 2– released from HACC in different precipitation behaviors to form their respective precipitates, thereby discovering the mechanism of regulating the precipitation rates of different heavy metals by controlling the activity of calcium carbonate. Based on it, the stepwise recovery of heavy metals was realized by adjusting the calcium carbonates with different activity. The present work provides guidance for gentle and efficient removal of heavy metal pollution in water bodies and inspires the future development of recovery of heavy metals.
通讯机构：
[Peng, H ] W;Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Hubei, Peoples R China.
关键词：
Magnetic chitosan microspheres;Coking wastewater;Regeneration;Adsorption
摘要：
As a new type of polymer functional material, magnetic chitosan has been widely used in wastewater treatment. In this study, magnetic chitosan microspheres (MCMs) were prepared by reversed-phase microemulsion cross-linking technology, and the adsorption capacity of MCMs to organic pollutants with high chemical oxygen demand (COD) in coking wastewater was studied. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), brunauer - emmett - teller (BET), vibrating sample magnetometer (VSM) were characterized. The effects of Fe 3 O 4 magnetic nanoparticles (MNPs), pH and the amount of adsorbent on the adsorption properties of MCMs were investigated. The following conclusions are obtained: the MCMs prepared in this study are successfully encapsulated, and the MCMs have good magnetic properties; Meanwhile, the removal performance of COD is higher. When the addition amount of Fe 3 O 4 is 10 % of the mass fraction of chitosan, the maximum adsorption amount of COD by MCMs can reach 261.82 mg/g under the conditions of pH 7.5, reaction temperature 298 K and adsorption time 42 h. The adsorption kinetics can be described by a quasi-second-order kinetic model. In addition, after 4 times of adsorption-desorption processes, the adsorbent still has more than 40 % COD adsorption, and has good adsorption performance. In general, because of the high adsorption efficiency, strong regeneration and excellent magnetic separation performance, MCMs have practical application potential in sewage treatment, biomedicine and other fields.
As a new type of polymer functional material, magnetic chitosan has been widely used in wastewater treatment. In this study, magnetic chitosan microspheres (MCMs) were prepared by reversed-phase microemulsion cross-linking technology, and the adsorption capacity of MCMs to organic pollutants with high chemical oxygen demand (COD) in coking wastewater was studied. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), brunauer - emmett - teller (BET), vibrating sample magnetometer (VSM) were characterized. The effects of Fe 3 O 4 magnetic nanoparticles (MNPs), pH and the amount of adsorbent on the adsorption properties of MCMs were investigated. The following conclusions are obtained: the MCMs prepared in this study are successfully encapsulated, and the MCMs have good magnetic properties; Meanwhile, the removal performance of COD is higher. When the addition amount of Fe 3 O 4 is 10 % of the mass fraction of chitosan, the maximum adsorption amount of COD by MCMs can reach 261.82 mg/g under the conditions of pH 7.5, reaction temperature 298 K and adsorption time 42 h. The adsorption kinetics can be described by a quasi-second-order kinetic model. In addition, after 4 times of adsorption-desorption processes, the adsorbent still has more than 40 % COD adsorption, and has good adsorption performance. In general, because of the high adsorption efficiency, strong regeneration and excellent magnetic separation performance, MCMs have practical application potential in sewage treatment, biomedicine and other fields.
