期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 69, 期 10, 页码 2426-2432出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2008.04.035
关键词
Chalcogenides; Semiconductors; Photoelectron spectroscopy; Microstructure
资金
- National Natural Science Foundation of China [50521604]
- National Basic Research Program of China [2003CB214500]
Hexagonal ZnIn2S4 photocatalysts with different morphology and crystallinity (micro-structures) were prepared in aqueous-, methanol- and ethylene glycol-mediated conditions via a solvothermal/hydrothermal method. The aqueous- and methanol-mediated ZnIn2S4 presented to be Flowering-Cherry-like microsphere, while the ethylene glycol-mediated ZnIn2S4 presented to be micro-cluster. In comparison with two other products, aqueous-mediated ZnIn2S4 possessed the best crystallinity (micro-structure), which resulted in the highest photocatalytic activity for hydrogen evolution under visible-light irradiation. Additionally, aqueous-mediated ZnIn2S4 was found to be more stable than the other two ZnIn2S4 photocatalysts while undergoing the photocatalytic process. During the photocatalytic reaction, the average rates for hydrogen production over aqueous-, methanol- and ethylene glycol-mediated ZnIn2S4 were determined to be 27.3,12.4 and 9.1 mu mol h(-1), respectively, in the present photocatalytic systems. (C) 2008 Elsevier Ltd. All rights reserved.
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