Research progress in bismuth oxyhalide compouds photocatalysts

BiOX(X= Cl,Br,I),as a new visible-light-driven photocatalyst due to its unique layered structure and a suitable band gap,has attracted more and more interest in recent years. In this review, recent developments in the area of BiOX photocatalysis research, in terms of new materials preparation,have been summarized from a structural perspective. Bismuth oxyhalides structural design is directly related to its specific surface area,absorption capacity,adsorption and charge carrier mobility,and thus affects its performance and function. Also,modification methods,such as doping, loading and construct heterojunction,which further improve the photocatalytic properties of bismuth oxyhalide,are discussed. The immobilization of BiOX photocatalysts is briefly described. The development of photocatalysts shall be aimed to achieve the regulation of preparation-structure- properties of the catalyst,through deep studies of preparation methods,band structure and catalytic mechanism,and then to expand its application fields.