Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 158, Issue -, Pages 182-189Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.04.019
Keywords
BiOCl; Visible light; Photosensitivity; Electron injection
Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- National Basic Research Program of China (973 Program) [2013CB632405]
- National Natural Science Foundation of China (NSFC) [21273038, U1033603]
- Fund of Key Laboratory of Opto-electronic Materials Chemistry and Physics, Chinese Academy of Sciences [2008DP173016]
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In-depth understanding the dye sensitization process over the semiconductor is the key issue for the applications of dye-sensitized solar cells, hydrogen production, and environmental remediation. This work addresses the role of high-quality BiOCl nanoplates in the photosensitization process. It is found that there exists a strong interaction between Rhodamine B and BiOCl nanoplates, which greatly improves the electronic conductivity for interfacial electron injection. The fluorescence emission of Rhodamine B is thus markedly suppressed by the addition of BiOCl suspension, resulting from the electron injection from excited Rhodamine B into the conduction band of BiOCl nanoplates. Moreover, benefitting from the proper conduction band edge potential of BiOCl nanoplates, the injected electrons can be trapped by the surface absorbed O-2 to generate reactive oxygen species, resulting in the high photosensitization activity for the Rhodamine B degradation under visible light irradiation. (C) 2014 Elsevier B.V. All rights reserved.
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