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.
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.
关键词：
Carbon nitride;Surface hydroxylation;Photocatalytic NO oxidation;Hydrothermal reaction;Photocatalytic mechanism
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.
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.
期刊：
Journal of Materials Chemistry A,2025年 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.
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.
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.
摘要：
Although it has been demonstrated that biochar is an efficient technique for alleviating phosphate pollution in water, its widespread application has been limited due to the low adsorption capacity of raw biochar. Given calcium's high affinity for phosphate, this study prepared biochar through the pyrolysis of waste crayfish shells (PC) in the presence of boric acid (donated as BPC) and investigated its performance in removing phosphate from water. The experimental results shown that boric acid improved phosphate removal percentage of PC from 30.1% to 99.2% via enhancing the specific surface area and decreasing the original phosphorus content. The phosphate adsorption process of BPC followed a pseudo-first-order kinetic model, and the maximum adsorption capacity was 12.14 mg g -1 . The Langmuir equation could better describe its adsorption behavior. Additionally, BPC exhibited excellent phosphate adsorption performance in a wide pH range, and high tolerance to co-existing ions in water. This study provided a promising method to enhance the performance of PC, benefitting the wide application of PC.
Although it has been demonstrated that biochar is an efficient technique for alleviating phosphate pollution in water, its widespread application has been limited due to the low adsorption capacity of raw biochar. Given calcium's high affinity for phosphate, this study prepared biochar through the pyrolysis of waste crayfish shells (PC) in the presence of boric acid (donated as BPC) and investigated its performance in removing phosphate from water. The experimental results shown that boric acid improved phosphate removal percentage of PC from 30.1% to 99.2% via enhancing the specific surface area and decreasing the original phosphorus content. The phosphate adsorption process of BPC followed a pseudo-first-order kinetic model, and the maximum adsorption capacity was 12.14 mg g -1 . The Langmuir equation could better describe its adsorption behavior. Additionally, BPC exhibited excellent phosphate adsorption performance in a wide pH range, and high tolerance to co-existing ions in water. This study provided a promising method to enhance the performance of PC, benefitting the wide application of PC.
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.
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.
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.
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：
Industrial Cr(VI) effluents pose persistent environmental threats due to their toxicity and non-biodegradability. This study pioneers a novel functional sludge-derived biochar (SC@BC) synthesized via co-pyrolysis of coking sludge (CS, carbon source) and cold-rolling oily sludge (CROS, iron source) for enhanced Cr(VI) removal. Under optimized conditions (pyrolysis temperature: 800 degrees C, CS:CROS mass ratio = 1:1), SC@BC demonstrated a maximum Cr(VI) adsorption capacity of 161.13 mg/g. Kinetic analysis revealed that the adsorption process followed a pseudo-first-order model, governed by synergistic mechanisms of external diffusion and surface reactions. The removal mechanism involved electrostatic attraction, hydrogen bond, surface complexation, redox reactions, and precipitation, where Fe(II) acted as an electron donor to reduce Cr(VI) to less toxic Cr(III). Subsequent co-precipitation of Cr(III) with Fe(III) enhanced pollutant immobilization. ICP-MS analysis confirmed compliance of heavy metal leaching concentrations with GB 13456-2012 standards, validating environmental safety. This work provides a sustainable "waste-treats-waste" strategy for dual-sludge valorization and high-efficiency Cr(VI) remediation. Future research should assess SC@BC's scalability for industrial effluents and efficacy in multi-contaminant systems.
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：
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.
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>
摘要：
Iron-manganese modified biochar (FMBC) was synthesized from rice husk via a microwave-assisted low-temperature oxidation method for the simultaneous removal of Cd(II) and As(III) from aqueous solutions. Compared with the conventional oil-bath method, the microwave-assisted synthesis endowed FMBC with a more developed porous structure (38 % increase in pore volume and 45 % enlargement in average pore diameter) and richer surface functional groups (-OH, -COOH, Fe-OH, Mn-O), significantly enhancing its adsorption performance. The adsorption of Cd(II) and As(III) by FMBC demonstrated a monolayer adsorption. The maximum adsorption capacities for Cd(II) and As(III) by FMBC reached 75.21 mg/g and 3.46 mg/g, respectively. In the dual-adsorbate system, the presence of As(III) increased the adsorption of Cd(II) on FMBC by 4.66 %, and the presence of Cd(II) increased the adsorption of As(III) on FMBC by 26.17 %, indicating respective synergism effect. Mechanistic analysis indicated that the adsorption process mainly involved electrostatic adsorption, ion exchange, complexation with oxygen-containing groups, oxidation of As(III) to As(V) by MnOx and physical adsorption. This study provides a sustainable synthesis strategy for developing low-cost, high-performance multifunctional adsorbents with broad application potential.
Iron-manganese modified biochar (FMBC) was synthesized from rice husk via a microwave-assisted low-temperature oxidation method for the simultaneous removal of Cd(II) and As(III) from aqueous solutions. Compared with the conventional oil-bath method, the microwave-assisted synthesis endowed FMBC with a more developed porous structure (38 % increase in pore volume and 45 % enlargement in average pore diameter) and richer surface functional groups (-OH, -COOH, Fe-OH, Mn-O), significantly enhancing its adsorption performance. The adsorption of Cd(II) and As(III) by FMBC demonstrated a monolayer adsorption. The maximum adsorption capacities for Cd(II) and As(III) by FMBC reached 75.21 mg/g and 3.46 mg/g, respectively. In the dual-adsorbate system, the presence of As(III) increased the adsorption of Cd(II) on FMBC by 4.66 %, and the presence of Cd(II) increased the adsorption of As(III) on FMBC by 26.17 %, indicating respective synergism effect. Mechanistic analysis indicated that the adsorption process mainly involved electrostatic adsorption, ion exchange, complexation with oxygen-containing groups, oxidation of As(III) to As(V) by MnOx and physical adsorption. This study provides a sustainable synthesis strategy for developing low-cost, high-performance multifunctional adsorbents with broad application potential.
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.
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.
