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| TiO2/蒙脱石纳米复合物中TiO2的结构相变 | |
| 引用本文： | 孙红娟,刘 颖,彭同江,胡傲厚.TiO2/蒙脱石纳米复合物中TiO2的结构相变[J].无机化学学报,2011,27(3):403-408. |
| 作者姓名： | 孙红娟 刘 颖 彭同江 胡傲厚 |
| 作者单位： | 1. 四川大学材料科学与工程学院,成都,610065;西南科技大学固体废物处理与资源化省部共建教育部重点实验室,绵阳,621010 2. 四川大学材料科学与工程学院,成都,610065 3. 西南科技大学固体废物处理与资源化省部共建教育部重点实验室,绵阳,621010 |
| 基金项目： | 国家自然科学基金(No.40502008;No.41072033)资助项目 |
| 摘 要： | 以钛酸丁酯和季铵盐改性有机蒙脱石为原料,采用原位水解法和原位脱羟法制备了TiO2/蒙脱石纳米复合物。采用X射线衍射(XRD)、拉曼光谱(Raman)表征了不同焙烧温度下TiO2/蒙脱石纳米复合物中TiO2的结构相变,并与不同焙烧温度下纯TiO2的结构相变进行对比。结果发现TiO2/蒙脱石纳米复合物中TiO2从锐钛矿相开始转变为金红石的最低温度要比纯TiO2从锐钛矿开始相转变为金红石的最低温度高200℃,且在焙烧温度1 200℃时还存在锐钛矿相,而纯TiO2在焙烧温度800℃时就全部转换为金红石相。TiO2/蒙脱石纳米复合物中TiO2和纯TiO2的平均晶粒度都随焙烧温度升高而增大,但TiO2/蒙脱石纳米复合物中TiO2的平均晶粒度要小于相同温度下焙烧纯TiO2的平均晶粒度。表明蒙脱石结构层的硅氧结构抑制了TiO2晶型由锐钛矿相向金红石相的转变,进而使相变温度升高,同时阻碍了晶体的生长。 |
| 关 键 词： | 蒙脱石 TiO2 锐钛矿 金红石 结构相变 |
Phase Transition of TiO2 in TiO2 /Montmorillonite Nanocomposites |
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| SUN Hong-Juan,LIU Ying,PENG Tong-Jiang and HU Ao-Hou.Phase Transition of TiO2 in TiO2 /Montmorillonite Nanocomposites[J].Chinese Journal of Inorganic Chemistry,2011,27(3):403-408. | |
| Authors: | SUN Hong-Juan LIU Ying PENG Tong-Jiang and HU Ao-Hou |
| Institution: | College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technologly, Mianyang, Sichuan 621010, China,College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China,Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technologly, Mianyang, Sichuan 621010, China and Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technologly, Mianyang, Sichuan 621010, China |
| Abstract: | The TiO2/montmorillonite composites were prepared by in-situ hydrolyzing reaction and in-situ dehydrating reaction of tetrabutyl titanate-hexadecyl trimethyl ammonium bromide intercalated montmorillonite.The structural phase transition of TiO2 in TiO2/montmorillonite composites calcined at different temperatures was characterized by using X-ray diffraction(XRD) and Fourier transform Raman spectroscopy(Raman),and the results were compared with that of the product obtained from tetrabutyl titanate hydrolysis.... |
| Keywords: | montmorillonite TiO2 anatase rutile structural phase transition |
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