一种染料敏化可见光光催化剂——Bi24O31Cl10

A dye-sensitized visible light photocatalyst-Bi24O31Cl10.

作者信息

Wang Liang, Shang Jun, Hao Weichang, Jiang Shiqi, Huang Shiheng, Wang Tianmin, Sun Ziqi, Du Yi, Dou Shixue, Xie Tengfeng, Wang Dejun, Wang Jiaou

机构信息

Center of Materials Physics and Chemistry and Department of Physics, Beihang University, Beijing 100191, P. R. China.

1] Center of Materials Physics and Chemistry and Department of Physics, Beihang University, Beijing 100191, P. R. China [2] Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong NSW 2522, Australia.

出版信息

Sci Rep. 2014 Dec 9;4:7384. doi: 10.1038/srep07384.

The p-block semiconductors are regarded as a new family of visible-light photocatalysts because of their dispersive and anisotropic band structures as well as high chemical stability. The bismuth oxide halides belong to this family and have band structures and dispersion relations that can be engineered by modulating the stoichiometry of the halogen elements. Herein, we have developed a new visible-light photocatalyst Bi24O31Cl10 by band engineering, which shows high dye-sensitized photocatalytic activity. Density functional theory calculations reveal that the p-block elements determine the nature of the dispersive electronic structures and narrow band gap in Bi24O31Cl10. Bi24O31Cl10 exhibits excellent visible-light photocatalytic activity towards the degradation of Rhodamine B, which is promoted by dye sensitization due to compatible energy levels and high electronic mobility. In addition, Bi24O31Cl10 is also a suitable photoanode material for dye-sensitized solar cells and shows power conversion efficiency of 1.5%.

由于其分散性和各向异性的能带结构以及高化学稳定性，p 族半导体被视为一类新型的可见光光催化剂。卤氧化铋属于这一族，其能带结构和色散关系可以通过调节卤素元素的化学计量比来设计。在此，我们通过能带工程开发了一种新型可见光光催化剂 Bi24O31Cl10，它表现出高的染料敏化光催化活性。密度泛函理论计算表明，p 族元素决定了 Bi24O31Cl10 中分散电子结构的性质和窄带隙。Bi24O31Cl10 对罗丹明 B 的降解表现出优异的可见光光催化活性，由于能级匹配和高电子迁移率，染料敏化促进了这种活性。此外，Bi24O31Cl10 也是一种适用于染料敏化太阳能电池的光阳极材料，其功率转换效率为 1.5%。