RESEARCH PROGRESS ON PHOTOCATALYTIC DEGRADATION OF ORGANIC POLLUTANTS IN WATER BY BISMUTH VANADATE HETEROJUNCTIONS
Globally,the major concern related to the environment which human beings need to solve urgently in the 21st century is water environment pollution.As an emerging wastewater treatment technology,photocatalytic technology has the advantages of energy saving,environment-friendly,reusability,and no secondary pollution,and it conforms to the development concept of green,circular and low-carbon.Photocatalysis is one of the promising techniques applied over decades for wastewater treatment.BiVO4,as a hot photocatalyst,has received great attention due to its properties like its good response to visible light to make use of 48％of the visibe spectrum of sunlight,excellent chemical and photonic properties,non-toxic and stable,but it has some limitations such as poor photocharge transport ability and fast electron-hole pair recombination speed.In recent years,relevant researchers have combined BiVO4 with other semiconductor materials to form heterojunction photocatalysts,which improves the charge separation ability of single-component BiVO4,and has good prospects in wastewater treatment applications.In this review,the photocatalytic mechanism(Type Ⅰ,Type Ⅱ,and Z-scheme),heterostructure construction methods(cooperating with metal oxides,metal sulfides,homobismuth-based materials and MOFs),optimization methods of photocatalytic system(interface contact mode,crystal surface and morphology control,element doping,carbon material modification and vacancy engineering),and application process of BiVO4-based heterojunctions in water treatment(photocatalytic membrane technology,load anchoring)are systematically reviewed.In addition,this review summarizes the urgent scientific problems in current research and provides a reference for the development of efficient BiVO4-based heterojunction photocatalytic materials in the future.
bismuth vanadate(BiVO4)heterojunctionphotocatalysisorganics degradationdensity functional theory
万方数据
维普
