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Reduced graphene oxide/metal oxide nanoparticles composite membranes for highly efficient molecular separation

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Journal of Materials Science & Technology 2018年第9期34卷 1481-1486页

作者： Khalid Hussain Thebo Xitang Qian Qinwei Wei Qing Zhang Hui-Ming Cheng Wencai Ren Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China University of Chinese Academy of Science (UCAS) 19 A Yuquan Road Shijingshan District Belting 100049 China School of Materials Science and Engineering University of Science and Technology of China 72 Wenhua Road Shenyang 110016 China Tsinghua-Berkeley Shenzhen Institute (TBSI) Tsinghua University 1001 Xueyuan Road Shenzhen 518055 China

Graphene oxide（GO） membranes play an important role in various nanofiltration applications including desalination, water purification, gas separation, and pervaporation. However, it is still very challenging to achieve both high separation efficiency and good water permeance at the same time. Here, we synthesized two kinds of GO-based composite membranes i.e. reduced GO（rGO）@MoO2 and rGO@WO3 by in-situ growth of metal nanoparticles on the surface of GO sheets. They show a high separation efficiency of ～100% for various organic dyes such as rhodamine B, methylene blue and evans blue, along with a water permeance over 125 Lm（-2） h（-1） bar（-1）. The high water permeance and rejection efficiency open up the possibility for the real applications of our GO composite membranes in water purification and wastewater treatment. Furthermore, this composite strategy can be readily extended to the fabrication of other ultrathin molecular sieving membranes for a wide range of molecular separation applications.

关键词： Graphene oxide Composite membranes Separation Permeance

Entropic pressure between fluctuating membranes in multilayer systems

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Science China(Physics,Mechanics & Astronomy) 2018年第12期61卷 95-102页

作者： Long Li Xiaohuan Wang Yingfeng Shao Wei Li Fan Song State Key Laboratory of Nonlinear Mechanics (LNM) and Beijing Key Laboratory of Engineered Construction and Mechanobiology Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences School of Mechanical and Electrical Engineering North China Institute of Aerospace Engineering

Gaining insights into the fluctuation-induced entropic pressure between membranes that mediates cell adhesion and signal transduction is of great significance for understanding numerous physiological processes driven by intercellular *** much effort has been directed toward investigating this entropic pressure,there still exists tremendous controversy regarding its quantitative nature,which is of primary interest in biophysics,since Freund challenged the Helfrich’s well-accepted results on the distance *** this paper,we have investigated the entropic pressure between fluctuating membranes in multilayer systems under pressure and tension through theoretical analysis and Monte Carlo *** find that the scaling relations associated with entropic pressure depend strongly on the magnitude of the external pressures in both bending rigidityand surface tension-dominated *** particular,both theoretical and computational results consistently demonstrate that,in agreement with Helfrich,the entropic pressure p decays with inter-membrane separations c as p^c^(–3)for the tensionless multilayer systems confined by small external ***,our results suggest that the entropic pressure law follows to be p^c^(–1)and p^c^(–3),respectively,in the limit of large and small thermal wavelengths for bending fluctuations of the membranes in a tensionindependent manner for the case of large external pressures.

关键词： entropic pressure fluctuating membranes statistical mechanics theory Monte Carlo simulation cell adhesion

Metal-organic framework-based CO2 capture: from precise material design to high-efficiency membranes

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Frontiers of Chemical Science and Engineering 2020年第2期14卷 188-215,F0004页

作者： Yujie Ban Meng Zhao Weishen Yang State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

A low-carbon economy calls for CO capture *** separations represent an energy-efficient and environment-friendly process compared with distillations and solvent ***-organic frameworks(MOFs),as a novel type of porous materials,are being generated at a rapid and growing pace,which provide more opportunities for high-efficiency CO *** this review,we illustrate a conceptional framework from material design and membrane separation application for CO capture,and emphasize two importance themes,namely(i)design and modification of CO-philic MOF materials that targets secondary building units,pore structure,topology and hybridization and(ii)construction of crack-free membranes through chemical epitaxy growth of active building blocks,interfacial assembly,ultrathin two-dimensional nanosheet assembly and mixed-matrix integration strategies,which would give rise to the most promising membrane performances for CO capture,and be expected to overcome the bottleneck of permeability-selectivity limitations.

关键词： CO2 capture CO2-philic MOFs crack-free membranes

Controlling various contaminants in wastewater effluent through membranes and engineered wetland

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Frontiers of Environmental Science & Engineering 2009年第1期3卷 98-105页

作者： Sarper SARP Sungyun LEE Noeon PARK Nguyen Thi HANH Jaeweon CHO Department of Environmental Science and Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 500-712Korea

For effective wastewater reclamation and water recovery,the treatment of natural and effluent organic matters(NOM and EfOM),toxic anions,and micropollutants was considered in this *** different NOM(humic acid of the Suwannee River,and NOM of US and Youngsan River,Korea),and one EfOM from the Damyang wastewater treatment plant,Korea,were selected for investigating the removal efficiencies of tight nanofiltration(NF)and ultrafiltration(UF)membranes with different ***,bromate,and perchlorate were selected as target toxic anions due to their well known high ***-(2-chloroethyl)-phosphate(TCEP),oxybenzone,and caffeine,due to their different K_(ow) and pK_(a) values,were selected as target *** expected,the NF membranes provided high removal efficiencies in terms of all the tested contaminants,and the UF membrane provided fairly high removal efficiencies for anions(except for nitrate)and the relatively hydrophobic micropollutant,*** the wetlands,nitrate was successfully ***,a fair process of combining membranes with an engineered wetland could be proposed for sustainable wastewater reclamation and optimum control of contaminats.

关键词： wastewater reclamation natural organic matter(NOM) effluent organic matter(EfOM) membranes wetlands

Metal-organic framework membranes: From synthesis to electrocatalytic applications

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Chinese Chemical Letters 2020年第9期31卷 2189-2201页

作者： Xiaobang Liu Ting Yue Kai Qi Yubing Qiu Bao Yu Xia Xingpeng Guo Key Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China

Metal-orga nic frameworks(MOFs),as an emerging family of porous inorga nic-organic crystal materials,exhibit widely applications in gas storage and separation,drug release,sensing,and catalysis,owing to easily adjustable pore sizes,uniformly distributed metal centers,high surface areas,and tunable ***,MOF crystal powders are usually difficult to be directly applied into specific devices because of their brittleness,insolubility and low ***,to expand versatile MOF membranes with robustness and operational flexibility is urgent to satisfy practical *** numerous reports have reviewed the synthesis and applications of MOF membranes,relatively few reports the electrocatalytic properties based on MOF ***,this mini-review provides an overview of preparation of MOF membranes,including directed synthesis,secondary growth and electrochemical deposition ***,fabrication of ultrathin 2D MOF nanosheets those can be also defined as a kind of nanoscale MOF membranes is also *** performance of oxygen reduction reaction(ORR),oxygen evolution reaction(OER),hydrogen evolution reaction(HER)and CO2 reduction reaction(CO2RR) for diverse MOF membranes/nanosheets and their derivatives are introduced.

关键词： Metal-organic frameworks membranes Nanosheets Derivatives Synthesis Electrocatalysis

Two-dimensional graphitic carbon nitride based membranes for separation

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Science Bulletin 2019年第19期64卷 1385-1387页

作者： Yang Wang Bo Liu Hefei National Laboratory for Physical Sciences at the Microscale Fujian Institute of Innovation of Chinese Academy of Sciences School of Chemistry and Materials ScienceUniversity of Science and Technology of China

Energy crisis,resulting from growing population and emerging progress in modern society,has received global concern over the past *** these,feasible ways that can well address task-specified issues,such as available fresh water,are highly *** this regard,separation membranes consisting of twodimensional(2D)materials with abundant nano-pores,show great potential for water purification and seawater desalination,by virtue of their low transport resistance,high permeability and tailorable interlayer spacing(d).

关键词： CSA membranes for separation graphitic carbon nitride

Amyloid pores in mitochondrial membranes

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Neural Regeneration Research 2021年第11期16卷 2225-2226页

作者： Neville Vassallo Department of Physiology&Biochemistry Faculty of Medicine and SurgeryUniversity of MaltaMsida MSD 2080Malta

Neurodegenerative diseases of the amyloid type include common conditions such as Alzheimer’s disease,Parkinson’s disease,Huntington’s disease and amyotrophic lateral *** the fact that the phenotypes of these neuropathic maladies differ widely,ranging from cognitive to motor and psychotic disturbances,they are all characterized by the pathological accumulation and deposition in the central nervous system of well-ordered protein aggregates known as amyloid *** evidence indicates that rather than the end-stage mature fibrils,however,it is the smaller,metastable intermediate forms(known as oligomers)of the aggregated protein and peptides which represent the most neurotoxic species(Chiti and Dobson,2017).One suggested mechanism for such toxicity appears to involve the ability of oligomers to interact with plasma membranes whilst inducing cell leakage(Surguchov et al.,2017).However,contemporary work increasingly points to mitochondria,and hence mitochondrial membranes,as preferential targets for the pathogenic action of oligomers in the neuronal cell(Ghio et al.,2016).

关键词： Huntington membranes amyloid

Regularly channeled MXene membranes for ionic and molecular separation

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 591-594页

作者： Jingchong Liu Nü Wang Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China

Membrane-based separation technologies,compared with other traditional separation operations such as evaporation,extraction,precipitation and distillation,have the merits of low energy consumption,small land footprint and high efficiency and have,therefore,attracted wide attention in past decades[1,2].Laminar membranes formed by twodimensional(2D)nanosheet stacking showed high flexibility in adjusting the subnanoscale interlayer spacing to allow the unhindered transport of small ions or molecules,demonstrating high separation performance and economic applicability[3].

关键词： separation membranes distillation

Block copolymer assisted topochemical polymerization:A facile and efficient route to robust polymeric nanoporous membranes decorated with versatile amino acids

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Chinese Chemical Letters 2020年第3期31卷 885-889页

作者： Yun Liang Wanyue Ouyang Peng Wang Wanlin Zhang Shiqiang Wang Li Tian Yong Ju Guangtao Li Key Lab of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China

Based on block copolymer assisted topochemical polymerization,a new strategy for facilely producing robust nanoporous membranes with controlled incorporation of functional groups onto nanopores is *** exemplified by preparing nanoporous polypyrrole decorated with amino acids,this strategy exhibits a high degree of freedom for tailoring the surface functionality in the created pores.

关键词： Block copolymer Supramolecular ensemble Topochemical polymerization Nanoporous membranes Pore functionalization