| 在TiO2上CO的光催化氧化 |
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| 引用本文： | 张敏,金振声,王守斌,张治军.在TiO2上CO的光催化氧化[J].影像科学与光化学,2000,18(4):329-335. |
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| 作者姓名： | 张敏 金振声 王守斌 张治军 |
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| 作者单位： | 河南大学润滑与功能材料重点实验室, 开封475001 |
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| 摘 要： | 最近在“氧化的”TiO2(即表面无氧空位和Ti3+)上进行的CO光催化氧化研究发现:室温下,以黑光灯(峰值λ=365nm)光照时,“氧化的”TiO2无CO催化氧化的活性,但以杀菌灯(峰值λ=253.7nm)光照时,则对CO产生显著的催化活性.参照CO在过渡金属表面的催化氧化机理,对本现象进行了解释:黑光灯照时,O2在TiO2表面只生成O2(a)-,而O2(a)-不能使CO氧化,只有以杀菌灯照时,TiO2表面产生O(a)-,CO氧化反应才能发生.
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| 关 键 词： | TiO2 CO 光催化氧化 O(a)- |
| 收稿时间： | 2000-06-06 |
CO PHOTOCATALYTIC-OXIDATION ON TiO2 |
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| ZHANG Min,JIN Zhen-sheng,WANG Shou-bin,ZHANG Zhi-jun.CO PHOTOCATALYTIC-OXIDATION ON TiO2[J].Imaging Science and Photochemistry,2000,18(4):329-335. |
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| Authors: | ZHANG Min JIN Zhen-sheng WANG Shou-bin ZHANG Zhi-jun |
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| Institution: | Laboratory of Lubrication and Functional Materials, Henan University, Kaifeng 475001, P. R. China |
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| Abstract: | The photocatalytic oxidation of CO on the “oxidized” TiO 2 was investigated. No CO photooxidation reaction was observed with UV( λ =365 nm) radiation, but CO photocatalytic oxidation could be carried out with UV( λ =253.7 nm) radiation at room temperature. Referring to the catalytic oxidation mechanism of CO on transition metals, it was explained by: O - 2(a) obtained by the ionsorption of O 2 on the “oxidized” TiO 2 could not oxidize CO, CO photooxidation reaction only occured when O - (a) was produced under UV( λ =253.7 nm) illumination. |
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| Keywords: | TiO 2 CO photocatalytic oxidation O - (a) |
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