| Preparation of TiO2/Kaolinite Nanocomposite and Its Photocatalytical Activity |
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| 作者姓名： | LEI Shaomin GONG Wenqi BAI Chunhua QU Yi GU Yongqin XIONG Bihua WANG Cheng |
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| 作者单位： | School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | Titanium dioxide/ kaolinite nanocomposite was prepared by the sol-gel method, with layered kaolinite as a substrate and Ti （ OC4H9 ）4 as a precursor. The effects of hydrolysis, drying and calcination on the production of nanometric titanium dioxide were discussed. The optimal conditions for preparation were＂ bbtained through experiments. The 1- 10 nrn thick monolayer anatase nano TiO2 crystal was produced under the conditions as follows： hydrolyzed at 37-42 ℃ for 4 h, dried at 70-80 ℃ for 1 h, and calcined at 550-650℃ for 3 h. The rate of degradation of 40 mg/ L azo dye and 20 mg/ L acid red dye can reuch 96% and 81.45%, respectively.
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| 关 键 词： | 预备 TiO2高岭石纳米复合材料 活度 前体 水解 |
| 收稿时间： | 2005-09-25 |
| 修稿时间： | 2006-02-09 |
Preparation of TiO2/Kaolinite nanocomposite and its photocatalytical activity |
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| LEI Shaomin GONG Wenqi BAI Chunhua QU Yi GU Yongqin XIONG Bihua WANG Cheng.Preparation of TiO2/Kaolinite Nanocomposite and Its Photocatalytical Activity[J].Journal of Wuhan University of Technology. Materials Science Edition,2006,21(4):12-15. |
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| Authors: | Lei Shaomin Ph D Gong Wenqi Bai Chunhua Qu Yi Gu Yongqin Xiong Bihua Wang Cheng |
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| Affiliation: | (1) School of Resources and Environmental Engineering, Wuhan University of Technology, 430070 Wuhan, China |
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| Abstract: | Titanium dioxide/kaolinite nanocomposite was prepared by the sol-gel method, with layered kaolinite as a substrate and Ti(OC4H9)4 as a precursor. The effects of hydrolysis, drying and calcination on the production of nanometric titanium dioxide were discussed.
The optimal conditions for preparation were obtained through experiments. The 1–10 nm thick monolayer anatase nano TiO2 crystal was produced under the conditions as follows: hydrolyzed at 37–42 °C for 4 h, dried at 70–80 °C for 1 h, and calcined
at 550–650 °C for 3 h. The rate of degradation of 40 mg/L azo dye and 20 mg/L acid red dye can reach 96% and 81.45%, respectively.
Funded by National “973” Plan Research Project (No. 2004CB619204) and Educational Ministry Scientific and Technological Research
Key Project (No. 02052) |
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| Keywords: | kaolinite substrate TiO2/kaolinite nanocomposite photocatalysis |
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