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| 热处理温度对纳晶TiO_2微结构和光催化活性的影响(英文) | |
| 引用本文： | 党鸿辛,毛立群,李庆霖,张治军.热处理温度对纳晶TiO_2微结构和光催化活性的影响(英文)[J].化学研究,2004,15(2):1-5. |
| 作者姓名： | 党鸿辛 毛立群 李庆霖 张治军 |
| 作者单位： | 1. 中国科学院兰州化学物理研究所,固体润滑国家重点实验室,甘肃,兰州,730000;河南大学,特种功能材料重点实验室,河南,开封,475001 2. 中国科学院兰州化学物理研究所,固体润滑国家重点实验室,甘肃,兰州,730000 3. 河南大学,特种功能材料重点实验室,河南,开封,475001 |
| 基金项目： | SupportedbyNationalNaturalScienceFoundationofChina(2 0 0 710 10 ) . |
| 摘 要： | 以丙烯酸修饰的钛酸丁酯为前躯体,采用溶胶 凝胶法制备纳晶TiO2.用XRD,TEM,BET以及TG DTA考察了热处理温度对纳晶TiO2微结构的影响.测试结果表明,热处理温度对样品的微结构以及光催化活性有很大的影响.采用溶胶 凝胶法制备纳晶TiO2的最佳焙烧温度范围为400～600℃,低于400℃样品中的有机成分难以彻底消除且样品的结晶度不高;高于600℃,TiO2颗粒存在明显的热团聚,使晶粒尺度变大,粒径分布不均以及比表面积显著降低,这些因素都会造成样品活性降低. |
| 关 键 词： | 纳晶TiO2 热处理 微结构 光催化活性 |
Effect of Treating Temperature on Microstructure and Photoactivity of Nanocrystalline TiO2 |
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| Abstract.Effect of Treating Temperature on Microstructure and Photoactivity of Nanocrystalline TiO2[J].Chemical Research,2004,15(2):1-5. | |
| Authors: | Abstract |
| Abstract: | Nanocrystalline TiO2 was prepared by sol-gel method with tetrabutyl titanate modified by acrylic acid. The effects of heat treatment on microstructure were examined using XRD, TEM, BET and TG-DTA. The experimental results indicate that heat treatment significantly affects both microstructure and photoactivity. Results show that there is a relationship between microstructure and photoactivity.Heat treatment of the sample at temperature higher than 400 ℃ is essential for removal of organic components and to acquire perfect nanocrystalline TiO2. As roasting temperature is up to 600 ℃, the particle size and rutile content increase with increasing roasting temperature, which results in decrease of photoactivity. The proper roasting temperature is about 400 ～ 600 ℃ and the samples prepared in this range have high photocatalytic activity in degradation of brilliant red X-3B. |
| Keywords: | nanocrystalline TiO_2 heat treatment microstructure photoactivity |
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