Novel Ag-AgBr decorated composite membrane for dye rejection and photodegradation under visible light  

作　　者：Yixing Wang Liheng Dai Kai Qu Lu Qin Linzhou Zhuang Hu Yang Zhi Xu 

机构地区：[1]State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Frontiers of Chemical Science and Engineering》2021年第4期892-901,共10页化学科学与工程前沿（英文版）

基　　金：We gratefully acknowledge the financial support from the National Natural Science Foundation of China(Grant No.21908054).

摘　　要：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 synthesized polyacrylonitrile-ethanolamine(PAN-ETA)membrane with the aid of a chitosan(CS)-TiO_(2) layer via vacuum filtration and in-situ partial reduction.The introduction of the CS-TiO_(2) layer improved surface hydrophilicity and provided attachment sites for the Ag-AgBr nanoparticles.The PAN-ETA/CS-Ti0_(2)/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 stability 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.

关 键 词：Ag-AgBr dye rejection PHOTODEGRADATION visible light 

分 类 号：O62[理学—有机化学]