Journal
JOURNAL OF ENVIRONMENTAL SCIENCES
Volume 25, Issue 12, Pages 2487-2491Publisher
SCIENCE PRESS
DOI: 10.1016/S1001-0742(12)60330-1
Keywords
quantum dots; one-dimensionally-ordered ZnO nanorods; photocatalyst
Categories
Funding
- National Natural Science Foundation of China [61106059]
- Encouragement Foundation for Excellent Middle-aged and Young Scientists of Shandong Province [BS2011NJ003, BS2012CL005]
- Science-Technology Program of Higher Education Institutions of Shandong Province [J11LA10]
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An efficient photocatalyst was fabricated by assembling quantum dots (QDs) onto one-dimensionally-ordered ZnO nanorods, and the photocatalytic properties for Methyl Orange degradation were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-Vis-NIR absorption spectroscopy and photoluminescence. The results indicate that the catalyst with assembled QDs is more favorable for die degradation than the pristine ZnO nanorods. The QDs with core-shell structure lower the photocatalytic ability due to the higher carrier transport barrier of the ZnS shell layer. Besides its degradation efficiency, the photocatalyst has several advantages given that the one-dimensionally-ordered ZnO nanorods have been grown directly on indium tin oxide substrates. The article provides a new method to design an effective and easily recyclable photocatalyst.
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