期刊
GREEN CHEMISTRY
卷 12, 期 9, 页码 1611-1614出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0gc00236d
关键词
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资金
- National Natural Science Foundation of China [50625208, 20773097, 20877061]
- National Basic Research Program of China [2007CB613302]
CdS quantum dot (QDs)-sensitized Zn1-xCdxS solid solutions were successfully prepared by a simple cation exchange using hydrothermally synthesized ZnS nanoparticles (NPs) and Cd(NO3)(2) as precursors. The prepared samples show especially high visible-light photocatalytic H-2-production activity from aqueous solutions containing Na2SO3 and Na2S as sacrificial reagents even without a Pt co-catalyst. It was found that this high visible-light photocatalytic H-2-production activity is attributed to the quantum size effect of CdS; the presence of CdS QDs alters the energy levels of the conduction and valence bands in the coupled semiconductor system, which favors the electron transfer and enhances photoactivity.
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