| 铕、铈、钇离子对TiO2催化剂的改性作用 |
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| 引用本文： | 张俊平,王艳,戚慧心.铕、铈、钇离子对TiO2催化剂的改性作用[J].中国稀土学报,2002,20(5):478-480. |
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| 作者姓名： | 张俊平 王艳 戚慧心 |
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| 作者单位： | 北京师范大学化学系,北京,100875 |
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| 基金项目： | 教育部博士点基金资助项目 ( 1990 0 2 715 ) |
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| 摘 要： | 用浸渍法在微米级TiO2中添加Eu,Y,Ce离子，研究了其对微米级TiO2的改性作用。并以DBS的光降解反应为实验模型，比较催化剂的催化活性。与未加修饰的微米级TiO相比，自制的Y／TiO2,Ce/TiO2催化剂对DBS的光催化活性均有很大的提高。
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| 关 键 词： | TiO2 催化剂 改性 稀土 二氧化钛 铕 钇 铈 光催化活性 |
| 文章编号： | 1000-4343(2002)05-0478-03 |
| 修稿时间： | 2001年3月12日 |
Photocatalytic Behavior of TiO2 Doped with Eu,Ce,Y Ions |
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| Abstract: | The composite oxide catalysts Eu/TiO_2, Ce/TiO_2, Y/TiO_2 were prepared by impregnation method and characterized by means of TEM and BET. Be a model reaction, the photocatalytic degradation of DBS was investigated in TiO_2, Eu/TiO_2, Ce/TiO_2, Y/TiO_2 powder suspensions irradiated by high-pressure mercury lamp. Photocatalytic degradation efficiency of different catalysts was evaluated by the first-order kinetic constant. The results indicate that the size of TiO_2 has different effect on the photocatalytic behavior of TiO_2 doped with Eu, Ce, Y ions. The catalytic activity of micron scale TiO_2 increases 136 percent and 59 percent owning to doping Y and Ce respectively, while the catalytic activity of nanoscale TiO_2 decreases due to doping Y and Ce. |
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| Keywords: | rare earths titanium dioxide europium yttrium cerium photocatalytic activity |
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