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Dahlia-shaped BiOCl x I 1−x structures prepared by a facile solid-state method: Evidence and mechanism of improved photocatalytic degradation of rhodamine B dye

2017; Elsevier BV; Volume: 503; Linguagem: Inglês

10.1016/j.jcis.2017.05.016

1095-7103

Jing Xie, Yali Cao, Dianzeng Jia, Yizhao Li,

Perovskite Materials and Applications

A rapid and cheap solid-state chemical process was employed to synthesize BiOClxI1−x (x = 1.0, 0.75, 0.5, 0.25, 0) solid solutions with dahlia-shaped hierarchitectures. The dahlia-shaped BiOClxI1−x hierarchitectures were effectively constructed by nanoplates with a thickness about 5–13 nm. 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 BiOClxI1−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 60 min under the visible light irradiation, it is higher than the reported bismuth oxyhalides materials. The trapping experiments confirmed that O2- and h+ played the major role in the photocatalytic process and the possible photocatalytic reaction mechanism was illustrated.