Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 37, Pages 9255-9263Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.07.017
Keywords
Oxide materials; Thin films; Crystal growth; Crystal structure; Optical spectroscopy
Categories
Funding
- Natural Science Foundation of China [50772048]
- Natural Science Foundation of China and China Engineering Physics [10776014]
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ZnO films with three different microstructures including hexagonal prisms, plates and rose-like twinned crystals were fabricated using chemical bath deposition with different concentration of gelatin. The growth mechanisms of ZnO films were discussed, and the gelatin played a vital role as a polyelectrolyte capping the formation of microstructures. The photoluminescence and Raman properties were found sensitive to the crystal morphologies of ZnO films. Significantly, the photodegradation efficiencies of methylene blue under UV light irradiation in the presence of ZnO films consisted of hexagonal prisms and rose-like twinned crystals were 95% and 96%, respectively. The excellent photocatalytic activities can be ascribed to the high oxygen vacancies concentration and high percentage of polar planes, and this result was important in addressing the origin of high photocatalytic activity. (C) 2011 Elsevier B.V. All rights reserved.
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