Bi4Ti3O12光催化材料的制备及性能研究进展

Research Progress on Preparation and Properties of Bi4Ti3O12 Photocatalytic Materials

Bi4Ti3O12禁带间隙较窄,能在可见光下响应,因而具有比TiO2更好的光催化性能。但Bi4Ti3O12作为光催化剂应用存在着光量子效率不高、光生电子与空穴易结合及对可见光的吸收有限等问题。综述了近年来Bi4Ti3O12光催化剂的研究,研究表明通过元素掺杂及半导体复合等改性手段可以有效抑制光生电子与空穴的复合率,提高Bi4Ti3O12的光催化性能。最后对Bi4Ti3O12光催化剂未来的发展方向进行展望。

Compared with TiO 2, Bi 4Ti 3O 12 semiconductor photocatalyst had better photocatalytic performance due to its narrow band gap and capacity of responding in visible light. However, the low quantum efficiency, easy recombination of electrons and holes, and low visible light absorption making the semiconductor photocatalyst far away from practical use. This paper reviews the recent research on Bi 4Ti 3O 12 photocatalysts, the researches show that the photocatalytic properties of Bi 4Ti 3O 12 can be improved by suppressing the recombination of electrons and holes by means of elemental doping and semiconductor recombination. At last,the prospects for future investigations of the Bi 4Ti 3O 12 semiconductor photocatalyst are proposed.