| 热处理对纳米TiO2光催化活性的影响 |
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| 引用本文： | 刘守新,孙承林.热处理对纳米TiO2光催化活性的影响[J].化学工业与工程,2004,21(3):161-164. |
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| 作者姓名： | 刘守新 孙承林 |
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| 作者单位： | 中国科学院大连化学物理研究所,辽宁,大连,116023;东北林业大学,黑龙江,哈尔滨,150040;中国科学院大连化学物理研究所,辽宁,大连,116023 |
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| 基金项目： | 中国博士后科学基金资助(2002032174) |
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| 摘 要： | 本文对纳米TiO2光催化剂在空气气氛中进行程序升温热处理,以苯酚的光催化降解反应评价光催化剂活性,以XRD、FTIR分析TiO2的晶相结构、粒子大小和表面结构随处理温度的变化情况。分析了热处理作用条件下TiO2光催化活性的变化机理。400℃条件下热处理TiO2具有最高光催化活性。适宜的表面结构、粒子大小及晶相结构是纳米TiO2光催化剂表现出较高催化活性的主要原因。
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| 关 键 词： | 纳米TiO2 热处理 晶相结构 光催化活性 粒径 表面结构 |
| 文章编号： | 1004-9533(2004)03-0161-04 |
| 修稿时间： | 2003年6月19日 |
Effect of Thermal Treatment on the Photocatalytic Activity of Nanosize TiO2 |
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| LIU Shou-xin.Effect of Thermal Treatment on the Photocatalytic Activity of Nanosize TiO2[J].Chemical Industry and Engineering,2004,21(3):161-164. |
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| Authors: | LIU Shou-xin |
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| Affiliation: | (1、2),SUN Cheng-lin~1 (1.Dalian Institute of Chemical Physics,The Chinese Academy of Sciences, Liaoning Dalian 116023,China; 2.Northeast Forestry University,Heilongjiang Harbin 150040,China |
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| Abstract: | Nanosize TiO_2 photocatalysts were thermal treated with programmed temperature in air atmosphere and photooxidation of phenol was used to evaluate the photocatalytic activity of resulting TiO_2. XRD and FTIR were adopted to identify phase structure, particle size and surface structure. The mechanism of thermal treatment on the photocatalytic activity of nanosize TiO_2 was discussed. The results show the photocatalytic activity of TiO_2 increases with the increase of thermal temperature until 400℃,above which the activity of TiO_2 decreases. Suitable surface structure,particle size and anatase phase were necessary for high photocatalytic activity of TiO_2 photocatalyst. |
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| Keywords: | nanosize TiO_2 thermal treatment phase structure photocatalytic activity particle size surface structure |
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