| 低温下溶胶凝胶法制备TiO2纳米晶 |
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| 引用本文： | 陈志君,赵高凌,李 红,张俊娟,宋 斌,韩高荣. 低温下溶胶凝胶法制备TiO2纳米晶[J]. 无机化学学报, 2010, 26(5): 860-866 |
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| 作者姓名： | 陈志君 赵高凌 李 红 张俊娟 宋 斌 韩高荣 |
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| 作者单位： | 1. 浙江大学硅材料国家重点实验室,材料科学与工程系,杭州,310027
2. 浙江大学理学院物理系,杭州,310027 |
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| 基金项目： | 国家自然科学基金，浙江省科研厅项目 |
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| 摘 要： | 从含过量水的溶胶出发，在室温下得到了TiO2纳米晶。通过红外光谱，透射电子显微镜法和X射线粉末衍射法对含有过量水的溶胶体系中TiO2纳米晶的室温形成机理进行了研究。与传统的溶胶凝胶法相比，在改良的溶胶凝胶体系中，在缩聚反应之前由于水过量使得钛的先驱体快速且充分的水解，从而生成[TiO6]基团，随之形成TiO2纳米晶。晶粒的尺寸为约3.5 nm，该法得到的TiO2纳米晶比传统溶胶凝胶法得到的TiO2纳米晶和商用光催化剂德固赛P25具有更好的光催化活性。
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| 关 键 词： | TiO2纳米晶； 改良的溶胶凝胶体系； 机理； 光催化活性 |
Preparation of Nanocrystalline TiO2 by Sol-Gel-Method at Room Temperature |
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| CHEN Zhi-Jun,ZHAO Gao-Ling,LI Hong,ZHANG Jun-Juan,SONG Bin and HAN Gao-Rong. Preparation of Nanocrystalline TiO2 by Sol-Gel-Method at Room Temperature[J]. Chinese Journal of Inorganic Chemistry, 2010, 26(5): 860-866 |
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| Authors: | CHEN Zhi-Jun ZHAO Gao-Ling LI Hong ZHANG Jun-Juan SONG Bin HAN Gao-Rong |
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| Affiliation: | State Key Laboratory of Silicon Materials, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027,State Key Laboratory of Silicon Materials, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027,State Key Laboratory of Silicon Materials, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027,State Key Laboratory of Silicon Materials, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027,Department of Physics, Zhejiang University, Hangzhou 310027 and State Key Laboratory of Silicon Materials, and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 |
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| Abstract: | Nanoerystalline titania (TiO2) particles were obtained at room temperature by a modified sol-gel method starting from a solution with large amount of water.The nanoerystalline TiO2 particles prepared with large amount of water at room temperature were characterized by IR,TEM and XRD.Comparing with conventional sol-gel method,the present system offers quick and complete hydrolysis of titanium precursor before polycondensation,thus resulting in [TiO6] units,and the formation of nanocrystalline TiO2 particles with an average grain size of 3.5 nm.Moreover,the as-prepared nanocrystalline TiO2 powders exhibit a better photocatalytic activity than both of the powders prepared by conventional sol-gel method and the commercial photocatalyst Degussa P25. |
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| Keywords: | nanocrystalline TiO2 modified sol-gel method mechanism photocatalytic activity |
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