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Research Article | Open Access

Enhanced photocatalytic activity in Ag-nanoparticle-dispersed BaTiO3 composite thin films: Role of charge transfer

Suwei ZHANG, Bo-ping ZHANG( ), Shun LI, Zhicheng HUANG, Chushu YANG, Huiying WANG
Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Abstract

Optical absorption and photocatalytic activity can be enhanced by surface plasmon resonance (SPR) effect, but the charge transfer (CT) mechanism between the dispersed noble metal nanoparticles (NPs) and the semiconductor matrix has been ignored. Herein, we adduce a direct and strong evidence in Ag-nanoparticle-dispersed BaTiO3 (Ag/BTO) composite films through X-ray photoelectron and photoluminescence spectra which reveals the CT from BTO trapped by Ag NPs under UV light and from Ag NPs to BTO under visible light. Owing to the broadened optical absorption and efficient CT from Ag NPs to BTO, the Ag25/BTO film manifests the optimal photocatalytic activity under the irradiation of visible light rather than UV–Vis light. Our work provides a helpful insight to design highly efficient plasmonic photocatalyst through considering the synergetic effect of the CT between metal and semiconductor on the enhanced photocatalytic activity.

Keywords

charge transfer (CT)composite filmsphotocatalytic activitysurface plasmon resonance (SPR)

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Journal of Advanced Ceramics
Volume 6 Issue 1,
March 2017
Pages 1-10
DOI: 10.1007/s40145-016-0209-x
Cite this article:
ZHANG S, ZHANG B-p, LI S, et al. Enhanced photocatalytic activity in Ag-nanoparticle-dispersed BaTiO3 composite thin films: Role of charge transfer. Journal of Advanced Ceramics, 2017, 6(1): 1-10. https://doi.org/10.1007/s40145-016-0209-x

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Received: 08 July 2017
Revised: 09 September 2017
Accepted: 09 February 2018
Published: 02 March 2017
© The author(s) 2016

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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