Issue 26, 2013

Synthesis of the bismuth oxyhalide solid solutions with tunable band gap and photocatalytic activities

Abstract

Three series of BiOMxR1−x (M, R = Cl, Br, I) solid solutions were systematically synthesized through a low-temperature precipitation. These solid solutions were characterized by XRD, FESEM, TEM, EDS, UV-vis spectra, nitrogen sorption/desorption, and PL. The tunable band gaps of the as-prepared solid solutions were realized via only changing the molar ratio of two halide ions. Meanwhile, the influence of citric acid in the formations of controllable morphological structures was discussed to study the growth mechanism of solid solutions. The photocatalytic activities of the bismuth oxyhalide solid solutions have also been investigated by the degradation of Rhodamine-B (RhB) under visible light irradiation. The optimized solid solutions possess higher photocatalytic activity than pure ones [BiOM (M = Cl, Br, I)] due to the broadened range of visible light response and the reduced recombination rate of electron–holes pairs. The results show that the synthesis of BiOMxR1−x (M, R = Cl, Br, I) solid solutions have profound significance for the design of the novel photocatalyst materials.

Graphical abstract: Synthesis of the bismuth oxyhalide solid solutions with tunable band gap and photocatalytic activities

Supplementary files

Article information

Article type
Paper
Submitted
23 Feb 2013
Accepted
15 Apr 2013
First published
15 Apr 2013

Dalton Trans., 2013,42, 9706-9712

Synthesis of the bismuth oxyhalide solid solutions with tunable band gap and photocatalytic activities

K. Ren, J. Liu, J. Liang, K. Zhang, X. Zheng, H. Luo, Y. Huang, P. Liu and X. Yu, Dalton Trans., 2013, 42, 9706 DOI: 10.1039/C3DT50498K

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