| Characterization of metal doped-titanium dioxide and behaviors on photocatalytic oxidation of nitrogen oxides |
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| 作者姓名： | LIU Yue WANG Hai-qiang WU Zhong-biao~* |
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| 作者单位： | LIU Yue WANG Hai-qiang WU Zhong-biao~* Department of Environmental Engineering，Zhejiang University，Hangzhou 310027，China. |
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| 摘 要： | A series of nanosized ion-doped TiO_2 catalysts with different ion content(between 0.1 at.% and 1.0 at.%) have been prepared by wet impregnation method and investigated with respect to their behavior for UV photocatalytic oxidation of nitric oxide.The catalytic activity was correlated with structural,electronic and surface examinations of the catalysts using X-ray diffraction analysis (XRD),ultraviolet-visible(UV-Vis)absorption spectroscopy,transmission electron microscopy(TEM),energy disperse spectrometer (EDS)and high resolution-transmission electron microscopy (HR-TEM) techniques.An enhancement of the photocatalytic activity was observed for Zn~(2 ) doping catalyst ranged from 0.1 at.% to 1.0 at.% which was attributed to the lengthened lifetime of electrons and holes.The improvement in photocatalytic activity could be also observed with the low doping concentration of Cr~(3 )(0.1 at.%). However,the doping of Fe~(3 ),Mo~(6 ),Mn~(2 ) and the high doping concentration of Cr~(3 ) had no contribution to photocatalytic activity of nitric oxide.
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| 关 键 词： | 一氧化氮 二氧化钛 掺杂 金属 |
| 收稿时间： | 2 March 2007 |
| 修稿时间： | 2 April 2007 |
Characterization of metal doped-titanium dioxide and behaviors on photocatalytic oxidation of nitrogen oxides |
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| LIU Yue WANG Hai-qiang WU Zhong-biao*.Characterization of metal doped-titanium dioxide and behaviors on photocatalytic oxidation of nitrogen oxides[J].Journal of Environmental Sciences,2007,19(12):1505-1509. |
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| Authors: | LIU Yue WANG Hai-qiang WU Zhong-biao |
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| Institution: | Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | A series of nanosized ion-doped TiO2 catalysts with different ion content (between 0.1 and 1.0 at.%) have been prepared by wet impregnation method and investigated with respect to their behaviour for UV photocatalytic oxidation of nitric oxide. The catalytic activity had been correlated with structural, electronic and surface examinations of the catalysts using X-ray diffraction analysis (XRD), ultraviolet-visible (UV-Vis) absorption spectroscopy, transmission electron microscopy (TEM), energy disperse spectrometer (EDS) and high resolution-transmission electron microscopy (HR-TEM) techniques. An enhancement of the photocatalytic activity was observed for Zn2 doping catalyst ranged from 0.1 to 1.0 at.% which was attributed to the lengthened lifetime of electrons and holes. The improvement in photocatalytic activity could be also observed with the low doping concentration of Cr3 (0.1 at.%). However, the doping of Fe3 , Mo6 , Mn2 and the high doping concentration of Cr3 had no good contribution to photocatalytic activity of nitric oxide. |
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| Keywords: | NO photocatalytic oxidation ion doping doped nitrogen oxides photocatalytic oxidation dioxide metal good contribution However improvement concentration lifetime doping catalyst enhancement photocatalytic activity techniques high energy spectrometer transmission electron microscopy |
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