| TiO2/AC复合光催化剂对苯和丁醛的气相光催化降解机理 |
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| 引用本文： | 张建臣,郭坤敏,马兰,赵红阳. TiO2/AC复合光催化剂对苯和丁醛的气相光催化降解机理[J]. 催化学报, 2006, 27(10): 853-856 |
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| 作者姓名： | 张建臣 郭坤敏 马兰 赵红阳 |
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| 作者单位： | 中国人民解放军防化指挥工程学院化学防护系,北京,100083;中国人民解放军防化研究院第一研究所,北京,100083 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2002AA743035) |
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| 摘 要： | 利用溶胶-凝胶并水热处理法制备了TiO2光催化剂和TiO2/AC复合光催化剂,在静态光催化反应器中研究了苯和丁醛的气相吸附和光催化降解,利气相色谱分析确定了生成的中间体. 结果表明, TiO2/AC复合光催化剂比TiO2光催化剂具有较强的吸附能力和较高的光催化活性; 在TiO2和TiO2/AC上,苯(或丁醛)光催化降解产生相同的中间体,表明在两种催化剂上发生的光催化反应遵循相同的机理,进而讨论了其可能的光催化氧化途径.
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| 关 键 词： | 二氧化钛 活性炭 光催化剂 苯 丁醛 降解 反应机理 |
| 文章编号： | 0253-9837（2006）10-0853-04 |
| 收稿时间： | 2006-02-21 |
| 修稿时间： | 2006-02-21 |
Reaction Mechanisms for Gas-Phase Photocatalytic Degradation of Benzene and Butyraldehyde over TiO2/AC Composite Photocatalyst |
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| ZHANG Jianchen,GUO Kunmin,MA Lan,ZHAO Hongyang. Reaction Mechanisms for Gas-Phase Photocatalytic Degradation of Benzene and Butyraldehyde over TiO2/AC Composite Photocatalyst[J]. Chinese Journal of Catalysis, 2006, 27(10): 853-856 |
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| Authors: | ZHANG Jianchen GUO Kunmin MA Lan ZHAO Hongyang |
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| Abstract: | The TiO_2 photocatalyst and TiO_2/AC composite photocatalyst were prepared by sol-gel and hydrothermal treatment methods.In a static photocatalytic reactor,the gas-phase adsorption and photocatalytic degradation of benzene and butyraldehyde over the two photocatalysts were studied,and the intermediates and products were detected by gas chromatography.The TiO_2/AC composite photocatalyst had stronger adsorption capability and higher photocatalytic activity than the TiO_2 photocatalyst.The intermediates and products were the same over TiO_2 and TiO_2/AC,which indicated that the photocatalytic degradation of benzene(or butyraldehyde) over the two catalysts followed the same mechanism.The possible photocatalytic oxidation pathways were discussed. |
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| Keywords: | titania activated carbon photocatalyst benzene butyraldehyde degradation reaction mechanism |
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