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membrane Transport Modulates the pH-Regulated Feedback of an Enzyme Reaction Confined within Lipid Vesicles

ACS NANO 2025年第10期19卷 9814-9825页

作者： Ridgway-Brown, Darcey Leathard, Anna S. France, Oliver Muench, Stephen P. Webb, Michael E. Jeuken, Lars J. C. Henderson, Peter J. F. Taylor, Annette F. Beales, Paul A. Univ Leeds Sch Chem Leeds LS2 9JT England Univ Leeds Astbury Ctr Struct Mol Biol Leeds LS2 9JT England Univ Sheffield Chem & Biol Engn Sheffield S1 3JD England Univ Leeds Fac Biol Sci Sch Biomed Sci Leeds LS2 9JT England Leiden Univ Leiden Inst Chem NL-2300 RA Leiden Netherlands Univ Southampton Sch Chem & Chem Engn Southampton SO17 England

Understanding ion transport dynamics in reactive vesicles is pivotal for exploring biological and chemical processes and essential for designing synthetic cells. In this work, we investigate how proton transport and membrane potential regulate pH dynamics in an autocatalytic enzyme reaction within lipid vesicles. Combining experimental and numerical methods, we demonstrate that compartmentalization within lipid membranes accelerates internal reactions, attributed to protection from the external acidic environment. In experiments, we explored how proton movement significantly impacts internal reactions by changing bilayer thickness, adding ion transporters, and varying buffers. Numerical investigations incorporated electrical membrane potential and capacitance into a kinetic model of the process, elucidating the mechanisms that dictate the control of reaction time observed in the experiment, driven by both electrical and chemical potential gradients. These findings establish a framework for controlling pH clock reactions via membrane changes and targeted manipulation of proton movement, which could aid in the design of synthetic cells with precise, controlled functionalities.

关键词： enzymes membrane confinement permeability pH vesicles urease

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Preparation of Modified Composite Nanofiltration membrane Synergistically Using Carboxylic Multi- walled Carbon Nanotube and β-cyclodextrin

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 232-239页

作者： LIU Peng MAO Junpeng FANG Yanfeng YU Yunwu CHEN Changxiu TANG Ning WAN Ye GU Yaxin LIU Yunxue WANG Lihua School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China

A new modified blend ultrafiltration(UF)membrane with good hydrophilicity,high porosity and excellent anti-fouling performance was developed by using carboxylic multi-walled carbon nanotube(CMWCNT)as casting solution ***,a composite nanofiltration(NF)membrane with large water flux and good retention rate was fabricated by using the PVDF/CMWCNT blend UF membrane as the substrate,and polyvinyl alcohol(PVA),β-cyclodextrin(β-CD)and polyethylenimine(PEI)as the coating *** results show that with the appropriate addition of CMWCNT in the casting solution,the surface roughness,porosity and recovery rate of the PVDF/CMWCNT blend UF membrane is obviously *** water flux of blend UF membrane is significantly improved when the CMWCNT content increases from 0 wt%to 0.2 wt%.The water flux of blend UF membrane with 0.2 wt%CMWCNT is 162.7 L/(m^(2)·h),which is 44.3%higher than that of the pure PVDF ***β-CD content is 0.8 wt%,the retention rate of Congo red by PVDF/CMWCNT/β-CD composite NF membrane reaches 98.7%,which is 28.3%higher than that of single PVA/PEI modified *** research will provide a new idea and simple method for developing novel high-performance composite NF membranes.

关键词： CMWCNT cyclodextrin nanofiltration membrane

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Ultra-high-flux passive cooling enabled by a sweating-inspired hygroscopic membrane

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Carbon Energy 2025年第2期7卷 13-23页

作者： Zengguang Sui Fuxiang Li Yunren Sui Haosheng Lin Wei Wu School of Energy and Environment City University of Hong KongHong KongChina City University of Hong Kong Shenzhen Research Institute ShenzhenChina

Passive thermal management in electronics has disadvantages of low efficiency and high ***,experimental and numerical studies on the geometric optimization of a hygroscopic-membrane heat sink(HMHS)are *** HMHS is based on water evaporation from a membrane-encapsulated hygroscopic salt solution,in which pin fins are used for thermal conductivity enhancement.A comprehensive heat and mass transfer model is developed and *** obtain the HMHS configuration with the maximum cooling performance,an approach that couples the Taguchi method with numerical simulations is *** contribution ratio of each design factor is *** validated results demonstrate that the maximum temperature reduction provided by the HMHS can be further improved from 15.5℃to 17.8℃after optimization,achieving a temperature reduction of up to 21℃at a fixed heat flux of 25kW/m^(2)when compared with a similarly sized fin heat ***,the optimized HMHS extends the effective cooling time by∼343%compared with traditional phase-change materials,achieving a maximum temperature reduction ranging from 7.0℃to 20.4℃.Meanwhile,the effective heat transfer coefficient achieved is comparable with that of forced liquid *** findings suggest that the proposed cooling approach provides a new pathway for intermittent thermal management,which is expected to be used for thermal regulation of electronics,batteries,photovoltaic panels,and LED lights.

关键词： electronics hygroscopic solution membrane optimization passive thermal management Taguchi method

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Adsorption-desorption hysteresis of gas mixtures/graphite system through molecular simulation: Implications for gas separation membrane technology

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FLUID PHASE EQUILIBRIA 2025年 593卷

作者： Raza, Arshad King Fahd Univ Petr & Minerals KFUPM Dept Petr Engn Dhahran 31261 Saudi Arabia

Graphite could potentially serve as a membrane for enhanced gas separation in the petroleum sector. The extraction of in-situ hydrogen (H2) in natural gas reservoirs will be challenging due to the presence of methane (CH4) and carbon dioxide (CO2). A downhole wellbore membrane to selectively produce hydrogen while prohibiting the flow of CO2 and other gases would improve economic viability. However, investigations on graphite for gas transport of CO2, H2, and CH4 in terms of hysteresis have received little attention. For this paper, we used molecular dynamics simulation to investigate H2, CO2 and CH4 adsorption/desorption behavior on graphite under various pressures (2.75-41.37 MPa) and temperatures (350 K). By combining Grand Canonical Monte Carlo with molecular dynamics, the simulation not only investigates sorption but also examines the interaction between graphite and gases. Our results indicate that the adsorption capacity is directly correlated to pressure and the adsorption curve reaches the maximum at a high pressure of 41.37 MPa. At extreme pressures, the rate of adsorption increases, but at a lower pressure indicating limited availability of adsorbent pores. The sorption capacity non-linearly with pressure limits both the adsorption and desorption process with a maximum sorption capacity of about 11.3 mmol/g for H2, 17 mmol/g for CH4 and 43 mmol/g for CO2 at a pressure of about 40 MPa. The desorption curve slightly overlaps the adsorption curve and marks the hysteresis effect between the two processes of adsorption and desorption. The effect of hydrogen on the graphite is less than carbon dioxide or methane. The discrepancy among adsorbent preferences for carbon dioxide arises from size, polarizability or interaction energy. In terms of diffusion coefficients, hydrogen can be said to have a higher diffusion coefficient than that of carbon dioxide while carbon dioxide has a higher one when compared to methane, probably due to its lighter molecular weight an

关键词： Hysteresis Graphite membrane Gas mixtures Hydrogen production

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Scalable, flexible and hierarchically porous Janus membrane inducing Zn-Ion flux redistribution and desolvation for dendrite-free zinc anodes

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CHEMICAL ENGINEERING JOURNAL 2025年 506卷

作者： Mu, Jiawei Yu, Miao Zhao, Bo Dai, Yan Li, Tiantian Li, Xiangcun Qi, Xinhong Wang, Xuri He, Gaohong Dalian Univ Technol Chem Engn Dept State Key Lab Fine Chem Dalian 116024 Peoples R China Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471023 Peoples R China

Optimizing Zn2+ dispersion and regulating Zn2+ deposition is a key issue in the aqueous Zn-ion anodes. Herein, the flexible membrane (CNT/PAN/Ag) with uniformly interwoven pores was facilely fabricated by one-step phase inversion method. The complex woven pore structure can effectively disperse the flow of Zn2+, reduce current density of nucleation sites, and avoid the aggregated deposition of Zn2+. Furthermore, the scalable Janus membrane with different affinities to electrolyte on the two sides can be designed based on the membrane surface structure. The high wettability of the upper surface of the membrane with electrolyte facilitates rapid transfer of Zn2+ flux into the membrane for redispersion, and low wettability of the back surface is benefit to isolate electrolyte from surface of the zinc anode and to avoid side reactions brought about by the aqueous electrolyte. Meanwhile, by virtue of the high adsorption energy with Zn2+, the doped Ag active sites in the membrane further extend the dispersion path of Zn2+ within the membrane and induce portion of Zn2+ to be deposited within the membrane, balancing and reducing current density at the deposition interface. In the galvanostatic current test of the symmetric battery at 1 mA cm- 2, 0.5 mAh cm- 2, the battery can be stably cycled more than 1000 h, the specific capacity of pouch cell with NH4V4O10 reserved 384 mA h/g at 5 Ag- 1 after 95 cycles. The work presents a new flexible membrane design for solving the Zn dendrites in aqueous zinc ion batteries.

关键词： membrane Dendrite Zn-Ion battery Anodes Deposition

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Defective cobalt-nitrogen dual-doped carbon materials for enhanced tetracycline hydrochloride degradation in flow-through electro-Fenton-membrane system

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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 2025年 194卷 941-954页

作者： Zhu, Ruiying Ma, Hong Luo, Xuan Zhao, Li Pan, Xiaofang Yang, Binfei Wu, Xiaochun Gong, Xiaobo Sichuan Normal Univ Coll Chem & Mat Sci Chengdu 610066 Sichuan Peoples R China Sichuan Prov Higher Educ Syst Key Lab Special Waste Water Treatment Chengdu 610066 Sichuan Peoples R China Sichuan Normal Univ Sichuan Prov Engn Res Ctr Livestock Manure Treatme Chengdu 610066 Sichuan Peoples R China Sichuan Normal Univ Key Lab Land Resources Evaluat & Monitoring Southw Minist Educ Chengdu 610068 Sichuan Peoples R China

Tetracycline hydrochloride (TC) is recognized as a newly emerging water pollutant with significant implications for human health and environmental quality. Conventional electro-Fenton (EF) processes often entail high energy consumption due to inherent limitations in mass transfer efficiency. Thus, a flow-through EF-membrane separation reactor was developed to synergistically achieve efficient filtration enrichment and oxidative degradation of TC. A defective-state cobalt-nitrogen double-doped carbon material (Co-NPC) derived from metalorganic materials could in-situ generate and self-decompose H2O2 into highly reactive center dot OH radicals for TC degradation. The activated membrane (Co-NPC/CNT/PVDF) is obtained by ultrasonically mixing Co-NPC with conductive CNT and filtering it onto a PVDF membrane. Remarkably, EF system with Co-NPC/CNT/PVDF membrane exhibited a remarkable TC degradation efficiency of 98 % within 2 min, with sustained degradation efficiency exceeding 90 % over 40 min. Moreover, the mineralization efficiency remained stable at approximately 55 %, harnessing the combined capabilities of membrane separation, enrichment, and catalytic oxidation for pollutant remediation. Benefitting from its hydrophilicity, specific surface area, pore size, and superior TC removal performance, the Co-NPC/CNT/PVDF membrane demonstrated exceptional self-cleaning properties and robust resistance to external disturbances. This innovative approach presents a promising strategy for the efficient in-situ production of H2O2 and degradation of pollutants, offering potential advancements in water treatment technology.

关键词： Electro-Fenton membrane Defect Tetracycline hydrochloride

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Recent progress in graphitic carbon nitride-based catalysts for water treatment: Contaminant elimination, disinfection and membrane applications

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SEPARATION AND PURIFICATION TECHNOLOGY 2025年第Part8期354卷

作者： Zhang, Bin Kong, Lingyu Yan, Xiaoyu Zhang, Haochen Wang, Zhenyi Xia, Shuangqing Han, Ziwen Xin, Yanjun Ding, An Ma, Jun He, Xu Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China Qingdao Agr Univ Coll Resource & Environm Qingdao Engn Res Ctr Rural Environm Qingdao 266109 Peoples R China

The field of water treatment has attracted extensive attention due to its close relationship with human health. As an effective water treatment technology, advanced oxidation processes (AOPs) based on catalysts can purify water effectively. Recently, graphitic carbon nitride (g-C3N4), 3 N 4 ), as a promising catalyst, has been widely applied in the fields of environment and energy owing to its unique advantages including better visible light activity, nonmetallic frame and excellent stability. However, there has been limited comprehensive summarization of the application of g-C3N4-based 3 N 4-based catalysts in water treatment. Hence, this work presents a review that focuses on the recent progress of g-C3N4-based 3 N 4-based catalysts in water treatment. The degradation of contaminants by g-C3N4-based 3 N 4-based catalysts with photo-assistance is summarized from the perspectives of catalyst modification and oxidant activation. Moreover, the summary and analysis of the degradation of pollutants by g-C3N4-based 3 N 4-based catalysts under the assistance of non-light-induced oxidant activation have been conducted. In addition, recent advances for the application of g-C3N4-based 3 N 4-based catalysts in disinfection and membrane treatment are also reviewed. Ultimately, the opportunities, challenges, and prospects for g-C3N4-based 3 N 4-based catalysts in water treatment are proposed to promote their popularization and practical application.

关键词： g-C3N4-based catalysts Contaminants Disinfection membrane Water treatment

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Translocation mechanism of anticancer drugs through membrane with the assistance of graphene quantum dot

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COLLOIDS AND SURFACES B-BIOINTERFACES 2025年 245卷 114340页

作者： Weng, Luxi Ren, Hao Xu, Ruru Xu, Jiahao Lin, Jun Shen, Jia-Wei Zheng, Yongke Zhejiang Univ Sch Med Affiliated Hosp 1 Dept Stomatol Hangzhou 310000 Peoples R China Hangzhou Normal Univ Sch Pharm Hangzhou 311121 Zhejiang Peoples R China Westlake Univ Affiliated Hangzhou Peoples Hosp 1 Sch Med Dept Rehabil 261 Huansha Rd Hangzhou 310006 Zhejiang Peoples R China Hangzhou Geriatr Hosp Dept Intens Care Unit Hangzhou 310022 Peoples R China

In recent years, as a new type of quasi-zero-dimensional nanomaterials, graphene quantum dots (GQDs) have shown excellent performance in advanced drug targeted delivery and controlled release. In this work, the delivery process of model drugs translocating into POPC lipid membrane with the assistance of GQDs was investigated via molecular dynamics (MD) simulation. Our simulation results demonstrated that a single doxorubicin (DOX) or deoxyadenine (DA) molecule is difficult to penetrate into the cell membrane. GQD7 could form sandwich-like structure with DOX and assist DOX to enter into the POPC membrane. However, due to the weak interaction with DA, both GQD7 and GQD19 can not assist DA translocating the POPC membrane in the limited MD simulation time. The drug delivery process for DOX could be divided into two steps: 1. GQDs and DOX aggregated into a cluster;2. the aggregates enter into the POPC membrane. In all our simulation systems, if GQDs loaded with model drugs and entered the cell membrane, it had little effect on the cell membrane structure, and the cell membrane could maintain high integrity and stability. These results may promote the molecular design and application of GQD-based drug delivery systems.

关键词： Anticancer drugs Drug delivery Graphene quantum dot Molecular dynamics simulation membrane

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Preparation of PES-g-P(ESA) membrane by Gamma-Ray Irradiation in Homogeneous Solution and its membrane Performance

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HIGH ENERGY CHEMISTRY 2025年第1期59卷 55-60页

作者： Fan, Kai Zhou, Junwei Liu, Wei Chen, Lin Ju, Yujie Chongqing Polytech Univ Elect Technol Chongqing 401331 Peoples R China

In this study, ethylene sulfonate (ESA) monomers were added to the polyethersulfone (PES) casting solution and gamma ray irradiation was used to prepare the PES-g-P(ESA) modified membranes. The measurement of the membrane's Fourier transforms infrared (FTIR) spectroscopy before and after irradiation revealed the effective progress of grafting reaction induced by gamma ray irradiation. The cross-sectional structure of the PES-g-P(ESA) modified membrane gradually transformed from the original finger-shaped pores to a sponge-like pore structure, according to scanning electron microscopy (SEM) analysis. Grafting of P(ESA) onto the PES molecular chains improved the hydrophilicity of the membrane, and the contact angle of the membrane steadily decreased as the grafting rate increased. Finally, when compared to pristine PES membranes, the modified PES-g-P(ESA) membrane exhibits an improvement of permeation, filtration, and antifouling performance. This research gives a reference and practical application for the fabrication of high-performance membranes via the gamma ray irradiation method.

关键词： polyethersulfone membrane ethylene sulfonate gamma ray irradiation performance

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CO2 and CH4 conversion to syngas via membrane and plasma routes: Challenges and future directions

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2025年 103卷 327-340页

作者： Yeong, Yin Fong Sunder, Naveen Chan, Zheng Fu Univ Teknol PETRONAS Dept Chem Engn Bandar Seri Iskandar 32610 Perak Malaysia Univ Teknol PETRONAS Ctr Carbon Capture Utilisat & Storage CCCUS R&D Bldg Bandar Seri Iskandar 32610 Perak Malaysia

The increase in emissions of greenhouse gases (GHGs) such as CO2 is the main reason for global warming which has attracted considerable attention over the year. Dry reforming is one of the attractive processes among the CO2 conversion and utilization approaches due to its ability to convert both CO2 and CH4 into syngas. Catalytic membrane and non-thermal plasma catalytic reactors are promising technologies for CO2 and CH4 conversion. Non-thermal plasma-catalytic in particular benefits from its low energy consumption and ease of operation. In this review, the mitigation techniques for CO2 capture along with their advantages and disadvantages are initially presented. Then, catalytic membrane reactors for dry reforming are introduced, followed by an analysis on the effect of operating parameters as well as the presence of catalysts toward gas conversion. Non-thermal dielectric barrier discharge (DBD) plasma method for dry reforming is subsequently introduced and discussed. Furthermore, the challenges and problems of both technologies to form syngas are highlighted. Lastly, examples of integrated DBD plasma-membrane systems utilized in other processes are explored which leads to a discussion on the future directions of these technologies for CO2 and CH4 conversion.

关键词： Carbon dioxide membrane Catalytic conversion Dielectric barrier discharge Syngas

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