期刊
SURFACE & COATINGS TECHNOLOGY
卷 204, 期 1-2, 页码 205-214出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2009.07.008
关键词
TiO2/ZnO; Nano composite film; Sol-gel; Photocatalysis
资金
- National Natural Science Foundation of China [50672090]
- Doctoral Program Foundation of Institutions of Higher Education of China [200804231004]
- SEM (EDS), XRD, and UV-vis
The TiO2/ZnO nano composite film with atomic ratios of Ti/(Ti + Zn) of 100%, 75%, 50%, 25%, and 0% was successfully prepared via sol-gel process from directly mixing TiO2/ZnO sol followed by heat treatment at 500 degrees C for 2 h in air. The SEM observation and the XRD measurement revealed that the microstructural morphology and the crystallization behavior of the composite film were essentially related to the atomic ratio of Ti/(Ti + Zn). The UV irradiated degradation of MO solution using the composite film as catalyst showed a linear tendency of the photocatalytic activity of the film against the value of Ti/(Ti + Zn). An exception to photocatalytic activity was observed for the film with Ti/(Ti + Zn) of 75%, which has been attributed to the poor crystallization of the film. Heat treatment with 5 h was applied to the film and better crystallization was achieved for the film. Consequently, a substantial improvement of the photocatalytic activity for the film was finally achieved. (C) 2009 Elsevier B.V. All rights reserved.
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