期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 183, 期 11, 页码 2720-2725出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.09.020
关键词
Photocatalysis; ZnO; Ag modification; Composites; One-pot synthesis
资金
- National Natural Science Foundation of China [21031001, 20971040, 21001042]
- Ministry of Education of China [708029]
- China Postdoctoral Science Foundation [20080440919]
- Heilongjiang Postdoctoral Grant [LBH-Z08040]
- Supporting plan for Excellent Youth of Common Universities of Heilongjiang province of China [1154G24]
- Doctoral Research Foundation of Heilongjiang University
- Youth Science Foundation of Heilongjiang University [QL200711]
Ag nanoparticles (NPs) modified ZnO microspheres (Ag/ZnO microspheres) were prepared by a facile one pot strategy in ethylene glycol (EG) medium. The EG played two important roles in the synthesis: it could act as a reaction media for the formation of ZnO and reduce Ag to Ag. A series of the characterizations indicated the successful combination of Ag NPs with ZnO microspheres. It was shown that Ag modification could greatly enhance the photocatalytic efficiency of ZnO microspheres by taking the photodegradation of Rhodamine B as a model reaction. With appropriate ratio of Ag and ZnO, Ag/ZnO microspheres showed the better photocatalytic performance than commercial Degussa P-25 TiO2. Photoluminescence and surface photovoltage spectra demonstrated that Ag modification could effectively inhibit the recombination of the photoinduced electron and holes of ZnO. This is responsible for the higher photocatalytic activity of Ag/ZnO composites. (C) 2010 Elsevier Inc. All rights reserved.
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