The Enhanced Photocatalytic Properties for Water Oxidation\nover Bi/BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> Composite
Xiaofeng Xu (103084)Shufang Kou (1579132)Xia Guo (486444)Xiaotong Li (113048)Xiaojian Ma (4275535)Hongzhi Mao (4275538)
Abstract
Bi/BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> has been successfully\nsynthesized by a simple annealing of BiVO<sub>4</sub> in Ar/H<sub>2</sub>. The obtained Bi/BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> was characterized by X-ray diffraction (XRD), Raman spectroscopy,\nX-ray photoelectron spectroscopy (XPS), and transmission electron\nmicroscopy (TEM). The photocatalytic activities are examined by an\noxygen-evolution reaction. When BiO/BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> in air and Bi<sub>2</sub>VO<sub>5.5</sub>/ BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> in vacuum were compared with the\nproducts annealing in other atmospheres, Bi/BiVO<sub>4</sub>/V<sub>2</sub>O<sub>5</sub> exhibited the best performance (2413 μmol·g<sup>–1</sup>·h<sup>–1</sup>), which could be attributed\nto the synergistic combination of Bi, BiVO<sub>4</sub>, and V<sub>2</sub>O<sub>5</sub>. This study may open up a new avenue for the\ndevelopment of an efficient composite photocatalyst.
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