Enhanced permeability and biofouling mitigation of forward osmosis membranes via grafting graphene quantum dots

作     者：Nan Li Yumeng Zhang Peng Li Bo Zhu Wei Wang Zhiwei Xu Nan Li;Yumeng Zhang;Peng Li;Bo Zhu;Wei Wang;Zhiwei Xu

作者机构：State Key Laboratory of Separation Membranes and Membrane ProcessesSchool of Textiles Science and EngineeringTiangong UniversityTianjin 300387China State Key Laboratory of Separation Membranes and Membrane ProcessesSchool of ChemistryTiangong UniversityTianjin 300387China 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2023年第17卷第10期

页      面：1470-1483页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：The work was funded by the National Natural Science Foundation of China(Grant No.22108203) 

主　　题：forward osmosis membrane graphene oxide quantum dots graft modification anti-fouling membrane XDLVO theory 

摘      要：In this paper,graphene oxide quantum dots with amino groups(NH_(2)-GOQDs)were tailored to the surface of a thin-film composite(TFC)membrane surface for optimizing forward osmosis(FO)membrane performance using the amide coupling *** results jointly demonstrated hydrophilicity and surface roughness of the membrane enhanced after grafting NH_(2)-GOQDs,leading to the optimized affinity and the contact area between the membrane and water ***,grafting of the membrane with a concentration of 100 ppm(TFC-100)exhibited excellent permeability performance(58.32 L·m^(–2)·h^(–1))compared with TFC membrane(16.94 L·m^(–2)·h^(–1)).In the evaluation of static antibacterial properties of membranes,TFC-100 membrane destroyed the cell morphology of Escherichia coli(***)and reduced the degree of bacterial *** the dynamic biofouling experiment,TFC-100 membrane showed a lower flux decline than TFC *** the physical cleaning,the flux of TFC-100 membrane could recover to 96%of the initial flux,which was notably better than that of TFC membrane(63%).Additionally,the extended Derjaguin–Landau–Verwey–Overbeek analysis of the affinity between pollutants and membrane surface verified that NH_(2)-GOQDs alleviates *** contamination of *** work highlights the potential applications of NH_(2)-GOQDs for optimizing permeability and biofouling mitigation of FO membranes.