卤氧化铋光催化剂的研究进展

Research progress in bismuth oxyhalide compouds photocatalysts

卤氧化铋BiOX(X=Cl,Br,I)因其独特的层状结构和适合的禁带宽度,在可见光下表现出很好的光催化活性,成为近年来新型光催化剂的研究热点之一。本文概述了国内外对卤氧化铋光催化剂的研究动态和发展成果,从结构角度总结了BiOX材料的制备和设计。卤氧化铋材料的结构维度直接关系到它的比表面积、吸光能力、吸附性能和载流子迁移速率,从而影响其性能和作用。通过掺杂、负载、构建异质结等改性方法,提高了卤氧化铋的光催化性能,并简单叙述了卤氧化铋光催化剂的固定化。最后指出通过制备方法、能带结构及催化机理的深入研究,实现催化剂制备-结构-性能的可调控化,以拓展其应用领域是卤氧化铋光催化剂未来的研究方向。

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.