| Synthesis and Photocatalytic Activity of Ti-pillared Bentonite |
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| 作者姓名： | TANG Jianwen WU Pingxiao ZHENG Shaoyan LIU Yun WANG Feifei XIE Xianfa |
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| 作者单位： | College of Environmental Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640 |
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| 基金项目： | 中国科学院资助项目;广东省博士启动基金 |
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| 摘 要： | Ti-pillared bentonite has been successfully prepared using a modified method that can induce the transformation of TiO2 pillar from amorphous to anatase phase at a low temperature （150℃）. The value of d0.01 =1.94 nm obtained by Ti-pillared bentonite is larger than that of corresponding raw clay （1.56 nm）. Due to large numbers of Ti-pillars formed, the Ti-pillared bentonite shows an excellent ability in adsorbing Rhodamine B （RB）. The photocatalytic activity and kinetic equation are investigated by decomposing RB solution under the UV irradiation. It is found that the Ti- pillared bentonite shows super photocatalytic activity for the degradation of RB solution compared with the untreated bentonite and pure TiO2, and the kinetic equation of the degradation of RB solution is a 1.5-oder equation.
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| 关 键 词： | 钛 柱状 斑脱土 光催化剂 动力方程 吸附作用 |
| 收稿时间： | 2005-10-24 |
| 修稿时间： | 2/1/2006 12:00:00 AM |
Synthesis and Photocatalytic Activity of Ti-pillared Bentonite |
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| Authors: | TANG;Jianwen;WU;Pingxiao;ZHENG;Shaoyan;LIU;Yun;WANG;Feifei;XIE;Xianfa |
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| Abstract: | Ti‐pillared bentonite has been successfully prepared using a modified method that can induce the transformation of TiO2 pillar from amorphous to anatase phase at a low temperature (150°C). The value of d001 =1.94 nm obtained by Ti‐pillared bentonite is larger than that of corresponding raw clay (1.56 nm). Due to large numbers of Ti‐pillars formed, the Ti‐pillared bentonite shows an excellent ability in adsorbing Rhodamine B (RB). The photocatalytic activity and kinetic equation are investigated by decomposing RB solution under the UV irradiation. It is found that the Ti‐pillared bentonite shows super photocatalytic activity for the degradation of RB solution compared with the untreated bentonite and pure TiO2, and the kinetic equation of the degradation of RB solution is a 1.5‐oder equation. |
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| Keywords: | Ti-pillared bentonite photocatalyst kinetic equation adsorption clay |
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