| Visible-Light Excitated Photocatalytic Activity of Rare Earth Metal-Ion-Doped Titania |
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| 作者姓名： | 谢一兵 李萍 袁春伟 |
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| 作者单位： | National Laboratory of Molecular & Biomolecular Electronics，Southeast University，National Laboratory of Molecular & Biomolecular Electronics，Southeast University，National Laboratory of Molecular & Biomolecular Electronics，Southeast University Nanjing，210096，China，Nanjing，210096，China，Nanjing，210096，China |
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| 基金项目： | NaturalScienceFoundationofJiangsuProvince (BK2 0 0 10 15 ) |
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| 摘 要： | Ｔｉｔａｎｉｕｍｄｉｏｘｉｄｅｉｓｓｕｐｐｏｓｅｄｔｏｂｅｔｈｅｂｅｓｔｍａｔｅｒｉａｌｉｎｐｈｏｔｏｃａｔａｌｙｔｉｃａｃｔｉｖｉｔｙ ,ｓａｆｅｔｙ ,ｃｏｓｔａｎｄｓｔａｂｉｌｉｔｙ .Ｂｕｔｌａｒｇｅｂａｎｄ ｇａｐｅｎｅｒｇｙ(3 .2ｅＶ)ｆｏｒｂｕｌｋａｎａｔａｓｅＴｉＯ2 ｌｉｍｉｔｓｉｔｓｐｒａｃ ｔｉｃａｌａｐｐｌｉｃａｔｉｏｎｉｎｔｈｅｃａｓｅｏｆｎａｔｕｒａｌｓｏｌａｒｌｉｇｈｔ.Ａｔｐｒｅｓｅｎｔ ,ｖａｒｉｏｕｓｍｅｔｈｏｄｓ ,ｓｕｃｈａｓｉｏｎｉｍｐｌａｎｔａｔｉｏｎａｎｄｔｈｅｃｏ…
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| 关 键 词： | 二氧化钛 稀土 金属离子 掺杂 可见光 光催化性能 |
Visible-Light Excitated Photocatalytic Activity of Rare Earth Metal-Ion-Doped Titania |
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| Xie Yibing,Li Ping,Yuan Chunwei.Visible-Light Excitated Photocatalytic Activity of Rare Earth Metal-Ion-Doped Titania[J].Journal of Rare Earths,2002,20(6):619-625. |
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| Authors: | Xie Yibing Li Ping Yuan Chunwei |
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| Abstract: | The rare earth ion Ce4+ doped TiO2 was prepared by sol-gel method. The average particle sizes are about 10 nm for sol phase and 55 nm for polycrystalline phase. The photocatalytic activities to degrade Reactive Brilliant Red Dye X-3B were investigated. The result reveals that the spectrum response of Ce4+-TiO2 has extended to visible region from the UV region(λ<387 nm) of pure TiO2. Amorphous phase Ce4+-TiO2 sol with an electron scavenger (1.0% atom fraction Ce4+ ion doping amount) shows the capability of the photocatalytic degradation of the dye X-3B as well as the nanocrystallite Ce4+-TiO2 with an interband trap site. Despite of the difference in the morphology of Ce4+-TiO2 photocatalyst, there is no apparent difference in respect of the decoloring effects. Whereas, polycrystalline phase Ce4+-TiO2 exhibits strong photomineralization power in comparison with the amorphous phase. The photocatalytic oxidation mechanisms of the dye molecule mainly involved in the self-photo-sensitization photolysis process by the first excited singlet oxygen (1O2) and photocatalysis process by hydroxyl radicals(*OH) under visible light irradiation. |
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| Keywords: | rare earths amorphous phase polycrystalline phase photocatalysis process self-photo-sensitization photolysis interband trap site electron scavenger |
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