Journal
CHINESE OPTICS LETTERS
Volume 7, Issue 10, Pages 956-959Publisher
CHINESE LASER PRESS
DOI: 10.3788/COL20090710.0956
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Funding
- National Natural Science Foundation of China [50872001, 50642038]
- Scientific Research Foundation of Education Ministry of Anhui Province of China [KJ2009A006Z, KJ2007B132, 2005KJ224]
- Anhui University of China [XJ200907, 20072006]
- Research Foundation for the Doctoral Program of Higher Education of China [20060357003]
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Nano-TiO2 thin films are deposited by radio frequency (RF) magnetron sputtering using TiO2 ceramic target and characterized by X-ray diffractometer, atomic force microscope, and ultraviolet-visible spectrophotometer. The photocatalytic activity is evaluated by light-induced degradation of methyl orange solutions (5, 10, and 20 ppm) using a high pressure mercury lamp as the light source. The film is amorphous, and its energy gap is 3.02 eV. The photocatalytic degradation of methyl orange solution is the first-order reaction and the apparent reaction rate constants are 0.00369, 0.0024, and 0.00151 for the methyl orange solution concentrations of 5, 10, and 20 ppm, respectively.
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