卤氧化铋光催化剂复合改性的研究进展

摘要

卤氧化铋BiOX (X=Cl,Br,I)因其独特的层状结构、合适的禁带宽度、良好的可见光响应性而展现出较高的光催化活性,引发了国内外学者的广泛关注.但它也存在吸收波带窄、稳定差等问题,因此需要对其进行复合改性.综述了几种主要的卤氧化铋复合改性的方法,如金属掺杂、负载碳材料、构建异质结等,介绍了其光催化机理和研究进展,并对现有的研究提出了一些问题和展望.%Bismuth oxyhalide BiOX (X=Cl,Br,I) exhibit high photocatalytic activity due to its unique layered structure,suitable band gaps and good visible light response,which has attracted the attention of scholars.However,there are some problems such as narrow absorption band and poor stability.Therefore,bismuth oxyhalide needs to be modified.This paper introduces several main composite modification methods of bismuth oxyhalogenide,such as metal doping,carbon materials loading and construction of heterojunction.The photocatalytic mechanism and research progress are introduced,and some problems and prospects on the existing research are put forward.