【摘 要】
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Photocatalytic membranes have received increasing attention due to their excellent separation and photodegradation of organic contaminants in wastewater.Herein,
【机 构】
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State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China University of
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Photocatalytic membranes have received increasing attention due to their excellent separation and photodegradation of organic contaminants in wastewater.Herein,we bound Ag-AgBr nanoparticles onto a synthe-sized polyacrylonitrile-ethanolamine(PAN-ETA)mem-brane with the aid of a chitosan(CS)-TiO2 layer via vacuum filtration and in-situ partial reduction.The introduction of the CS-TiO2 layer improved surface hydrophilicity and provided attachment sites for the Ag-AgBr nanoparticles.The PAN-ETA/CS-TiO2/Ag-AgBr photocatalytic membranes showed a relatively high water permeation flux(～47 L.m-2·h-1·bar-1)and dyes rejection(methyl orange:88.22％;congo red:95％;methyl blue:97.41％;rose bengal:99.98％).Additionally,the composite membranes exhibited potential long-term sta-bility for dye/salt separation(dye rejection:～97％;salt rejection:～6.5％).Moreover,the methylene blue and rhodamine B solutions(20 mL,10 mg·L-1)were degraded approximately 90.75％and 96.81％in batch mode via the synthesized photocatalytic membranes under visible light irradiation for 30 min.This study provides a feasible method for the combination of polymeric membranes and inorganic catalytic materials.
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