Journal
MATERIALS LETTERS
Volume 66, Issue 1, Pages 72-75Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2011.08.011
Keywords
Semiconductors; Microstructure; ZnO; Porous microspheres; Photocatalytic activity
Funding
- National Natural Science Foundation of China [90606001, 20873039]
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In this paper, hierarchical porous ZnO microspheres were successfully synthesized by calcining the microspheric zinc hydroxide carbonate (ZHC) precursor, which were the precipitate products of a hydrothermal reaction by zinc nitrate hexahydrate and urea in the presence of trisodium citrate. The as-prepared ZnO microspheres with diameters of 4-5 mu m were assembled by numerous porous nanosheets which had the uniform thickness of about 10 nm. The photocatalytic activity of the ZnO microspheres was evaluated by photodegradation reaction of methylene blue (MB). The as-prepared ZnO microspheres exhibited a significantly enhanced photocatalytic activity than commercial ZnO and TiO(2). This was mainly attributed to the larger specific surface area and stability against aggregation. (C) 2011 Elsevier B.V. All rights reserved.
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