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Chemistry. 2015 Oct 19;21(43):15360-8. doi: 10.1002/chem.201501183. Epub 2015 Sep 1.

Enhanced Photoelectrocatalytic Activity of BiOI Nanoplate-Zinc Oxide Nanorod p-n Heterojunction.

Author information

1
School of Chemistry and Chemical Engineering/Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, Guangzhou University, Guangzhou Higher Education Mega Center, Waihuan Xi Road No. 230, 510006 (P. R. China).
2
School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005 (Australia).
3
School of Chemistry and Chemical Engineering/Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, Guangzhou University, Guangzhou Higher Education Mega Center, Waihuan Xi Road No. 230, 510006 (P. R. China). lzqgzu@gzhu.edu.cn.
4
School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005 (Australia). lzqgzu@gzhu.edu.cn.
5
CSIRO Energy Flagship, PO Box 883, Kenmore, QLD 4069 (Australia).
6
School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005 (Australia). s.qiao@adelaide.edu.au.

Abstract

The development of highly efficient and robust photocatalysts has attracted great attention for solving the global energy crisis and environmental problems. Herein, we describe the synthesis of a p-n heterostructured photocatalyst, consisting of ZnO nanorod arrays (NRAs) decorated with BiOI nanoplates (NPs), by a facile solvothermal method. The product thus obtained shows high photoelectrochemical water splitting performance and enhanced photoelectrocatalytic activity for pollutant degradation under visible light irradiation. The p-type BiOI NPs, with a narrow band gap, not only act as a sensitizer to absorb visible light and promote electron transfer to the n-type ZnO NRAs, but also increase the contact area with organic pollutants. Meanwhile, ZnO NRAs provide a fast electron-transfer channel, thus resulting in efficient separation of photoinduced electron-hole pairs. Such a p-n heterojunction nanocomposite could serve as a novel and promising catalyst in energy and environmental applications.

KEYWORDS:

electron transport; nanostructures; p-n heterojunction; photoelectrochemical performance; solvothermal methods

PMID:
26332399
DOI:
10.1002/chem.201501183

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