Enhanced photocatalytic performance of tungsten-based photocatalysts for degradation of volatile organic compounds: a review

Photocatalytic oxidation process for the degradation of volatile organic compounds(VOCs)contaminants is a promising technology.But until now,the low photocatalytic activity of the conventional TiO_(2) photocatalyst under visible-light irradia-tion hinders the deployment of this technique for VOCs degradation.WO_(3) has been proved to be a suitable photocatalytic material for degradation of various VOCs as its appropriate band-gap,high stability and great capability.Nevertheless,the actual implementation of WO_(3) is still restricted by short lifetime of photoexcited charge carriers and low light energy conver-sion efficiency:its photocatalytic performance is needed to be improved.This review discusses the process of tungsten-based photocatalyst for removal of VOCs and summarizes a variety of strategies to improve the VOCs oxidation performances of WO_(3),such as controlling the morphology structure,engendering chemical defects,coupling heterojunction,doping suitable dopants and loading a co-catalyst.In addition,the practical application of tungsten-based photocatalyst is discussed.