Enhanced photocatalytic activity and charge transfer of a TiO2/BiVO4 nanostructured composite

Qiaonan Yu; Guoqiang Li; Feng Zhang

doi:10.1039/C9CY01482A

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Enhanced photocatalytic activity and charge transfer of a TiO₂/BiVO₄ nanostructured composite†

Qiaonan Yu,

^ab Guoqiang Li*^ac and Feng Zhang

Author affiliations

* Corresponding authors

^a Key Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng 475004, PR China
E-mail: gqli1980@henu.edu.cn

^b College of Electronics and Electrical Engineering, Nanyang Institute of Technology, Nanyang 473004, PR China

^c National Demonstration Centre for Experimental Physics and Electronics Education, School of Physics and Electronics, Henan University, Kaifeng 475004, PR China

Abstract

Fabricating binary composites is an effective method for improving photocatalytic performance, whereas the physics basis is debatable due to the limitations of powder specimens. Here, we investigate the photocatalytic performance of a TiO₂/BiVO₄ nanostructured composite with well spatially resolved TiO₂ and BiVO₄, which was epitaxially grown on an yttrium stabilized zirconia (001) substrate by pulsed laser deposition. The nanostructured composite showed a 300% enhancement in the apparent quantum yield of rhodamine B degradation at 440 nm. The electron transfer labeled by Ag photodeposition revealed that the band alignment is type II. Charge spatial separation could improve the utilization of not only photogenerated electrons, but also holes.

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Article information

DOI: https://doi.org/10.1039/C9CY01482A
Article type: Paper
Submitted: 26 Jul 2019
Accepted: 24 Aug 2019
First published: 26 Aug 2019

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Catal. Sci. Technol., 2019,9, 5333-5338

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Enhanced photocatalytic activity and charge transfer of a TiO₂/BiVO₄ nanostructured composite

Q. Yu, G. Li and F. Zhang, Catal. Sci. Technol., 2019, 9, 5333 DOI: 10.1039/C9CY01482A

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Catalysis Science & Technology