| Microstructure and Photocatalytic Decomposition of Methylene Blue by TiO2-Mounted Halloysite, a Natural Tubular Mineral |
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| 作者姓名： | LU Xianchu CHUAN Xiuyun WANG Aiping KANG Feiyu |
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| 作者单位： | [1]School of Earth and Space Sciences, Peking University, Beijing 100871 [2]Institute of Process and Engineering, Chinese Academy of Sciences, Beijing 100080 [3]Department of Material Science and Engineering, Tsinghua University, Beijing 100084 |
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| 基金项目： | 国家海外回国人员科学研究项目;中国科学院资助项目 |
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| 摘 要： | On the basis of analysis of structure and properties, halloysite, a natural tubular mineral, was developed for an environmental treatment. TiO2 was mounted into halloysite by using hydrolysis of tetrabutyl titanate at room temperature. The adsorption and photocatalytic performance of halloysite and TiO2-mounted halloysite have been examined in methylene blue aqueous solution in the dark and under ultraviolet ray irradiation, respectively. Their performance of adsorption and photodecomposition was evaluated from the adsorbed and degraded amounts of methylene blue （MB）. Due to the mixture of adsorption and photodecomposition, the concentration of MB, organic pollution, in water decreased rapidly with TiO2-mounted halloysite powder, which is a faster reaction than that with halloysite-only adsorption. This new use of halloysite is leading to many interesting applications in the decomposition and elimination of various pollutants in air and water.
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| 关 键 词： | 高岭石 微观结构 光催化 亚甲基 光解作用 |
| 收稿时间： | 2006-01-11 |
| 修稿时间： | 2006-02-17 |
Microstructure and Photocatalytic Decomposition of Methylene Blue by TiO2-Mounted Halloysite, a Natural Tubular Mineral |
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| Authors: | LU;Xianchu;CHUAN;Xiuyun;WANG;Aiping;KANG;Feiyu |
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| Abstract: | On the basis of analysis of structure and properties, halloysite, a natural tubular mineral, was developed for an environmental treatment. TiO2 was mounted into halloysite by using hydrolysis of tetrabutyl titanate at room temperature. The adsorption and photocatalytic performance of halloysite and TiO2-mounted halloysite have been examined in methylene blue aqueous solution in the dark and under ultraviolet ray irradiation, respectively. Their performance of adsorption and photodecomposition was evaluated from the adsorbed and degraded amounts of methylene blue (MB). Due to the mixture of adsorption and photodecomposition, the concentration of MB, organic pollution, in water decreased rapidly with TiO2-mounted halloysite powder, which is a faster reaction than that with halloysite-only adsorption. This new use of halloysite is leading to many interesting applications in the decomposition and elimination of various pollutants in air and water. |
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| Keywords: | halloysite TiO2-mounted halloysite methylene blue photodecomposition anti-pollution |
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