| 光催化氧化苯甲酸中毒机理的研究 |
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| 引用本文： | 王永强,于秀娟,孙德智,明琪,杨红芬.光催化氧化苯甲酸中毒机理的研究[J].功能材料,2006,37(10):1581-1583. |
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| 作者姓名： | 王永强 于秀娟 孙德智 明琪 杨红芬 |
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| 作者单位： | 哈尔滨工业大学,市政环境工程学院,黑龙江,哈尔滨,150090;哈尔滨工业大学,市政环境工程学院,黑龙江,哈尔滨,150090;黑龙江大学,环境科学与工程系,黑龙江,哈尔滨,150080 |
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| 摘 要： | 采用强化中毒的方法,详细的研究了光催化剂的中毒过程,并利用TEM、XPS、SPS和IR对催化剂进行了表面物化特性以及强化中毒产物的分析.结果表明:随着催化剂的反复使用,其SPS信号强度逐渐增强,光催化活性逐渐降低,反复使用20次后催化活性基本消失.中毒后的催化剂出现明显的颗粒团聚以及碳积累现象,其中羟基氧以及-CH2-和-CH2OH碳的含量明显增多,综合分析认为主要中毒产物为苯甲酸、羟基苯甲酸、顺丁烯二酸及反丁烯二酸等有机酸类化合物.
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| 关 键 词： | TiO2 光催化氧化 催化剂中毒 苯甲酸 |
| 文章编号： | 1001-9731(2006)10-1581-03 |
| 收稿时间： | 2005-09-27 |
| 修稿时间： | 2006-03-13 |
Study of photocatalytic deactivation mechanism during photooxidation of benzoic acid |
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| WANG Yong-qiang,YU Xiu-juan,SUN De-zhi,Ming Qi,Yang Hong-fen.Study of photocatalytic deactivation mechanism during photooxidation of benzoic acid[J].Journal of Functional Materials,2006,37(10):1581-1583. |
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| Authors: | WANG Yong-qiang YU Xiu-juan SUN De-zhi Ming Qi Yang Hong-fen |
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| Affiliation: | 1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; 2. Department of Environmental Science and Engineering Heilongjiang University, Harbin 150080,China |
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| Abstract: | The strengthening poisoning of catalysis was used to investigate the process of deactivation of photocatalyst. The changes of the structure and chemical states of the catalysis have been characterized using TEM, XPS, SPS and IR. The results indicate that the photocatalytic active reduced as well as the increase of SPS during the reaction. The catalyst was deactivated after 20 times. The deactivation catalysis shows aggregation and carbon accumulation, at the same time hydroxide oxygen and the carbon in the -CH2- and -CH2OH functional groups increase greatly. The main poisoning compounds are benzoic acid, hydroxide benzoic acid, maleic acid and fumaric. |
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| Keywords: | titanium dioxide photocatalytic oxidation catalyst deactivation benzoic acid |
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