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The hydrothermal synthesis of BiOBr flakes for visible-light-responsive photocatalytic degradation of methyl orange

The hydrothermal synthesis of BiOBr flakes for visible-light-responsive photocatalytic degradation of methyl orange
The hydrothermal synthesis of BiOBr flakes for visible-light-responsive photocatalytic degradation of methyl orange
Flake-like BiOBr semiconductors have been prepared using hydrothermal synthesis with meticulous control of synthesis parameters and used for photocatalytic degradation of methyl orange. XRD, SEM and UV–vis characterizations have been performed to study the obtained BiOBr materials. The results indicate that the morphology and crystallite size of BiOBr depend significantly on the temperature and duration of the hydrothermal syntheses. Diffuse UV–vis spectra show the BiOBr materials to be indirect semiconductors with an optical bandgap of approximately 2.92 eV, which is essentially unaffected by the synthesis parameters. The hydrothermal-synthesized BiOBr flakes exhibit noticeable activity for photo-degradation of methyl orange under visible light (>400 nm) illumination, with the BiOBr synthesized by hydrothermal treatment at 120 °C for 6 h exhibiting superior photocatalytic performance in these flakes. The excellent activity and photo-stability reveal that BiOBr is a promising visible-light-responsive photocatalyst.
BiOBr, flake, hydrothermal synthesis, visible light, photocatalysis
1010-6030
8-13
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Yang, F.
76c2eb4a-42a7-4097-b131-a4b7d1d1021e
Yang, G.D.
c4b9fda2-8d84-44eb-b35f-2d8ad9e2d555
Kong, L.A.
9333f7e3-74f0-4385-85e9-45b782715478
Jones, M.O.
8ca656ec-ae63-482d-b20a-144cab012648
Xiao, T.C.
59a66d2d-56bd-4fb8-9e8c-f463b59b11a2
Edwards, P.P.
638346ed-063e-4da0-9fdb-70d3dcb16e1e
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Yang, F.
76c2eb4a-42a7-4097-b131-a4b7d1d1021e
Yang, G.D.
c4b9fda2-8d84-44eb-b35f-2d8ad9e2d555
Kong, L.A.
9333f7e3-74f0-4385-85e9-45b782715478
Jones, M.O.
8ca656ec-ae63-482d-b20a-144cab012648
Xiao, T.C.
59a66d2d-56bd-4fb8-9e8c-f463b59b11a2
Edwards, P.P.
638346ed-063e-4da0-9fdb-70d3dcb16e1e

Jiang, Zheng, Yang, F., Yang, G.D., Kong, L.A., Jones, M.O., Xiao, T.C. and Edwards, P.P. (2010) The hydrothermal synthesis of BiOBr flakes for visible-light-responsive photocatalytic degradation of methyl orange. Journal of Photochemistry and Photobiology A: Chemistry, 212 (1), 8-13. (doi:10.1016/j.jphotochem.2010.03.004).

Record type: Article

Abstract

Flake-like BiOBr semiconductors have been prepared using hydrothermal synthesis with meticulous control of synthesis parameters and used for photocatalytic degradation of methyl orange. XRD, SEM and UV–vis characterizations have been performed to study the obtained BiOBr materials. The results indicate that the morphology and crystallite size of BiOBr depend significantly on the temperature and duration of the hydrothermal syntheses. Diffuse UV–vis spectra show the BiOBr materials to be indirect semiconductors with an optical bandgap of approximately 2.92 eV, which is essentially unaffected by the synthesis parameters. The hydrothermal-synthesized BiOBr flakes exhibit noticeable activity for photo-degradation of methyl orange under visible light (>400 nm) illumination, with the BiOBr synthesized by hydrothermal treatment at 120 °C for 6 h exhibiting superior photocatalytic performance in these flakes. The excellent activity and photo-stability reveal that BiOBr is a promising visible-light-responsive photocatalyst.

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Published date: 30 April 2010
Keywords: BiOBr, flake, hydrothermal synthesis, visible light, photocatalysis
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352788
URI: http://eprints.soton.ac.uk/id/eprint/352788
ISSN: 1010-6030
PURE UUID: 14f12148-8674-4745-a384-a5425e53f129
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

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Date deposited: 21 May 2013 10:54
Last modified: 17 Dec 2019 01:36

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Contributors

Author: Zheng Jiang ORCID iD
Author: F. Yang
Author: G.D. Yang
Author: L.A. Kong
Author: M.O. Jones
Author: T.C. Xiao
Author: P.P. Edwards

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