Dahlia-shaped BiOClxI1-x structures prepared by a facile solid-state method: Evidence and mechanism of improved photocatalytic degradation of rhodamine B dye

Jing Xie; Yali Cao; Dianzeng Jia; Yizhao Li

doi:10.1016/j.jcis.2017.05.016

Dahlia-shaped BiOCl_xI_1-x structures prepared by a facile solid-state method: Evidence and mechanism of improved photocatalytic degradation of rhodamine B dye

J Colloid Interface Sci. 2017 Oct 1:503:115-123. doi: 10.1016/j.jcis.2017.05.016. Epub 2017 May 10.

Authors

Jing Xie¹, Yali Cao², Dianzeng Jia³, Yizhao Li¹

Affiliations

¹ Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China.
² Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China. Electronic address: caoyali523@163.com.
³ Key Laboratory of Energy Materials Chemistry, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China. Electronic address: jdz@xju.edu.cn.

PMID: 28511100
DOI: 10.1016/j.jcis.2017.05.016

Abstract

A rapid and cheap solid-state chemical process was employed to synthesize BiOCl_xI_1-x (x=1.0, 0.75, 0.5, 0.25, 0) solid solutions with dahlia-shaped hierarchitectures. The dahlia-shaped BiOCl_xI_1-x hierarchitectures were effectively constructed by nanoplates with a thickness about 5-13nm. The band gap structure of the solid solutions can be modulated by adjusting the composition ratio of Cl and I, which has a significant effect on the photocatalytic activity of the solid solutions. The dahlia-shaped BiOCl_xI_1-x (x=0.75) solid solution exhibits excellent adsorption and effective photocatalytic performances for rhodamine B (RhB) under visible light irradiation, which degraded more than 98% of RhB within 60min under the visible light irradiation, it is higher than the reported bismuth oxyhalides materials. The trapping experiments confirmed that O^2- and h⁺ played the major role in the photocatalytic process and the possible photocatalytic reaction mechanism was illustrated.

Keywords: Bismuth compound; Hierarchical structure; Photocatalysis; Solid-state reaction.