Visible-light photocatalytic behavior of two different N-doped TiO2 |
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Authors: | Jiwei Zhang Zhishen Wu |
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Institution: | Key Laboratoy of Special Functional Materials, Henan University, Kaifeng 475001, PR China |
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Abstract: | The visible-light photocatalytic behavior of two different N-doped TiO2 correlated with their physicochemical properties was investigated. The results show that N-TiO2-1, prepared by a novel TiO2 with unique defect structure, is more active in visible-light photocatalytic oxidation of C3H6 than N-TiO2-2, prepared by standard P25-TiO2 (Degussa). The specific rate constant of the former is ca. 5 times that of the latter. One model of photoactive center (Vo -NO-Ti) in anatase phase responsible for the visible-light photocatalytic activity is proposed. The higher the Vo -NO-Ti concentration is, the better the visible-light photocatalytic activity is. |
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Keywords: | Nanotube titanic acid N-doped titanium dioxide Visible-light photocatalysis Photoactive center |
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