【摘 要】
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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 photocataiytic membrane device that can degrade dye po
【机 构】
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Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China;The Key Labo
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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 photocataiytic 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 C3N4(NS C3N4) 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.
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