High flux photocatalytic self-cleaning nanosheet C_(3)N_(4) membrane supported by cellulose nanofibers for dye wastewater purification  

作　　者：Lilong Zhang Ge Meng Guifang Fan Keli Chen Yulong Wu Jian Liu 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China [2]The Key Laboratory of Bionic Engineering(Ministry of Education),Jilin University,Jilin 130012,China [3]Department of Chemistry,Tsinghua University,Beijing 100084,China [4]School of Chemical Engineering and Technology,Xinjiang University,Urumqi 830046,China [5]College of Materials Science and Engineering Qingdao University of Science and Technology,Qingdao 266042,China

出　　处：《Nano Research》2021年第8期2568-2573,共6页纳米研究（英文版）

基　　金：supported by the National Key R&D Program of China(No.2018YFC1902101);the National Natural Science Foundation of China(Nos.21908127,21838006,and 21776159);the project supported by the Foundation(No.KF201810)of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/Shandong Province of China and Opening Project of the Key Laboratory of Bionic Engineering(Ministry of Education),Jilin University.

摘　　要：Hazardous dye substances discharged from the textile and dyestuff industries not only threaten local the surrounding ecosystems but are also hard to degraded.We report the preparation of process for a photocatalytic membrane device that can degrade dye pollution under visible light.This filtration membrane,with a well-organized multilayer structure,simultaneously achieves continuous and flow-through separation of degradation products.Cellulose nanofibers(CNFs)were used as a template for nanosheet C_(3)N_(4)(NS C_(3)N_(4))preparation;the performance for the photocatalytic degradation of dyes improved as the morphology changed from bulking to nanosheet.NS C3N4 was then attached to the surface of a prepared CNF membrane via vacuum filtration.This device exhibited high efficiency(the degradation rates of both Rhodamine B and Methylene blue both reached 96%),high flux(above 160 L·h^(-1)·m^(-2)·bar^(-1))and excellent stability(maintaining steady flux and high separation were maintained after 4 h).This easy-preparation,easy-scale-up,and low-cost process provides a new method of fabricating photocatalytic membrane devices for dye wastewater treatment.

关 键 词：high flux NANOFIBERS nanosheet C_(3)N_(4) photocatalytic membrane dye wastewater 

分 类 号：O644.1[理学—物理化学] X703[理学—化学]