期刊
SUPERLATTICES AND MICROSTRUCTURES
卷 65, 期 -, 页码 134-145出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2013.10.045
关键词
Ag/ZnO; Spindle; Heterostructure; Electron transfer; Photoluminescence; Photocatalysis
资金
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0972]
- National Natural Science Foundation of China [51152001]
- International Science & Technology Cooperation Program of China [2011DFA52290, 2012DFR50460]
- Shanxi Scholarship Council of China [2012-038]
Spindle-like Ag/ZnO heterostructure composites were synthesized through a solution-based surface modification method, during which Ag nanoparticles were deposited on the surfaces of ZnO spindles prepared in advance. The obtained samples were characterized by XRD, SEM, TEM, XPS, PL and UV-vis absorption spectroscopy. The photocatalytic activity of the as-prepared spindle-like Ag/ZnO samples with different Ag contents was tested with the photocatalytic degradation of methylene blue. Results showed that the photocatalytic activity of Ag/ZnO was obviously improved compared with the pure ZnO, and the Ag/ZnO-2 sample prepared with an AgNO3 concentration of 0.05 M had the highest photocatalytic activity. The Ag/ZnO heterostructure composites promoted the separation of photo-induced electrons and holes, which was proved by surface photovoltage spectroscopy. (C) 2013 Elsevier Ltd. All rights reserved.
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