Volume 17, Issue 4 p. 1275-1282
Full Paper

Crystal Facet Dependence of Water Oxidation on BiVO4 Sheets under Visible Light Irradiation

Donge Wang

Donge Wang

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

Graduate School of the Chinese Academy of Sciences (P.R. China)

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Hongfu Jiang

Hongfu Jiang

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

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Xu Zong

Xu Zong

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

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Qian Xu

Qian Xu

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

Graduate School of the Chinese Academy of Sciences (P.R. China)

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Yi Ma

Yi Ma

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

Graduate School of the Chinese Academy of Sciences (P.R. China)

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Dr. Guoling Li

Dr. Guoling Li

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

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Prof. Dr. Can Li

Corresponding Author

Prof. Dr. Can Li

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447

State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (P.R. China), Fax: (+86) 411-846-94447Search for more papers by this author
First published: 29 November 2010
Citations: 348

Graphical Abstract

On the face of it! Monoclinic BiVO4 with a controlled growth extent of the (040) facet was prepared by using trace TiCl3 as the directing agent under hydrothermal synthesis conditions for the first time. The photocatalytic activity of BiVO4 samples is found to proportionally correlate very well with the extent of the (040) facet growth (see graphic).

Abstract

Monoclinic BiVO4 crystals with preferentially exposed (040) facets were hydrothermally synthesized by using a trace amount of TiCl3 as the directing agent; this function was confirmed by X-ray diffraction patterns (XRD) and high-resolution transmission electron microscopy (HRTEM). The effects of the directing agent TiCl3 and the pH values applied during synthesis have been studied, and the optimized BiVO4 sample with highly exposed (040) facet could be obtained by using 1.2 at. % of TiCl3 as the directing agent at a pH value of 2. Some complementary techniques were also applied to exclude the effects of the structural and physical property changes, such as surface area and hydrophilicity. The photocatalytic activity of oxygen evolution on BiVO4 is found to be proportionally correlated with the exposed surfaces of the (040) facet. It is assumed that the active sites with a BiV4 structure on the exposed (040) facet is assigned to be responsible for the high activity of O2 evolution.