Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 104, Issue 4, Pages 1229-1235Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-011-6452-7
Keywords
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Funding
- National Science Foundation of China [10904129]
- Shanxi Province Science Foundation for Youths [2008021029-2]
- Ministry of Science and Technology of China [2007DFA50940]
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Hierarchical ZnO microrods have been prepared by cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal process at low temperature. Sheetlike or fluffy ZnO nanostructures have been developed in a large density on the surface of the microrods. The ZnO cores grow preferentially along [001]; the nanosheets are single crystalline and grow in two dimensions along the [001] and [120] directions. The formation of hierarchical structures has been attributed to the presence of CTAB in the solution, which facilitates the secondary nucleation and growth. The nanosheet-covered hierarchical microrods have been analyzed by Raman and photoluminescence spectroscopy, and they exhibit a blue emission at 465 nm and a strong orange emission at 640 nm. Photocatalytic activities of the products have been examined, and the nanosheet-covered hierarchical microrods display the best activity in photodegradation of phenol due to their unique surface features and high surface area.
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