Recent Progress on the Bismuth Oxyhalide Heterostructure Visible Light Photocatalysts

Bismuth oxyhalide BiOX(X=Cl,Br,I)exhibit excellent photocatalytic properties due to specific layered crystal structure and suitable band gaps.Among these photocatalysts,BiOBr and BiOI can be used as visible light photocatalysts directly thus attract worldwide attention.With brief synthesis process,constructing a heterojunction between BiOX and another material can induce high separation efficiency of electron-hole pairs and strong photocatalytic activity under visible light irradiation so that the photocatalytic efficiency can be further improved.Recent progresses on development of BiOBr and BiOI heterostructure visible light photocatalysts preparation methods,morphologies and visible light photocatalytic activities are reviewed.The future developing perspectives are also presented.