| 炭气凝胶孔结构对其负载的TiO2光催化降解甲基橙性能的影响 |
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| 引用本文： | 崔华楠,赵振华,梁业如,石建英,吴丁财,刘鸿,符若文.炭气凝胶孔结构对其负载的TiO2光催化降解甲基橙性能的影响[J].催化学报,2011,32(2):321-324. |
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| 作者姓名： | 崔华楠 赵振华 梁业如 石建英 吴丁财 刘鸿 符若文 |
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| 作者单位： | 中山大学化学与化学工程学院; |
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| 基金项目： | 中国科学院大连化学物理研究所催化基础国家重点实验室开放课题(N-10-01); 中央高校基本科研业务费专项资金(10lgpy35) |
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| 摘 要： | 选用两种孔径不同的炭气凝胶CA125和CA500制备了碳含量为20%的TiO2/CA光催化剂,采用X射线衍射、扫描电镜和N2吸附-脱附对催化剂进行了表征,并考察了其光催化降解甲基橙反应性能.结果表明,TiO2/CA样品中TiO2主要以锐钛矿相存在,伴随有少量的金红石相,且均匀分散于炭气凝胶的表面.催化剂的孔隙率分析表明,孔结构直接影响到催化剂的光催化活性,以中孔为主的TiO2/CA125活性要远高于TiO2/CA500.这主要源于中孔良好的吸附性能及其合适的空间限域效应.
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| 关 键 词： | 炭气凝胶 氧化钛 限域效应 光催化 甲基橙 降解 |
Influence of Carbon Aerogel(CA)Pore Structure on Photodegradation of Methyl Orange over TiO2/CA |
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| CUI Huanan,ZHAO Zhenhua,LIANG Yeru,SHI Jianying,WU Dingcai,LIU Hong,FU Ruowen.Influence of Carbon Aerogel(CA)Pore Structure on Photodegradation of Methyl Orange over TiO2/CA[J].Chinese Journal of Catalysis,2011,32(2):321-324. |
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| Authors: | CUI Huanan ZHAO Zhenhua LIANG Yeru SHI Jianying WU Dingcai LIU Hong FU Ruowen |
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| Institution: | CUI Huanan,ZHAO Zhenhua,LIANG Yeru,SHI Jianying,WU Dingcai,LIU Hong,FU Ruowen School of Chemistry and Chemical Engineering,Sun Yat-sen University,Guangzhou 510275,Guangdong,China |
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| Abstract: | Two kinds of carbon aerogel(CA) ,CA125 and CA500,with pore diameters of ～18 nm and > 50 nm,respectively,were used as supports to prepare TiO2/CA photocatalysts with the CA content of 20%. X-ray diffraction,scanning electron microscopy and N2 adsorption-desorption were used to characterize the crystal structure,morphology,and pore structures of the TiO2/CA photocatalysts,respectively. The loaded TiO2 was mainly anatase with a little amount of rutile,which was homogeneously dispersed on the CA support. The activity of TiO2/CA125 was much higher than that of TiO2/CA500 in the photodegradation of methyl orange. The photodegradation rate over TiO2/CA is mainly influenced by the pore structure of the catalysts. The favorable adsorption and suitable confinement effect of mesopore structure are beneficial to the photodegradation of methyl orange. Therefore,TiO2/CA125 with the large amount of mesopores displays the higher photocatalytic activity than TiO2/CA500. |
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| Keywords: | carbon aerogel titania confinement effect photocatalysis methyl orange degradation |
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