| Preparation and photocatalytic activity of La^3＋ and Eu^3＋ co-doped TiO2 nanoparticles： photo-assisted degradation of methylene blue |
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| 引用本文： | 史慧贤,张天永,王红亮.Preparation and photocatalytic activity of La^3＋ and Eu^3＋ co-doped TiO2 nanoparticles： photo-assisted degradation of methylene blue[J].中国稀土学报(英文版),2011,29(8):746-752. |
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| 作者姓名： | 史慧贤 张天永 王红亮 |
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| 作者单位： | [1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]Department of Nuclear Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China |
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| 基金项目： | Project supported by the “863 Program” of the Ministry of Science ＆ Technology of China （2006AA06Z348） |
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| 摘 要： |
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| 关 键 词： | 掺杂纳米TiO2 光催化活性 催化剂制备 亚甲基蓝 降解 高分辨透射电子显微镜 X射线光电子能谱 扫描电子显微镜 |
| 收稿时间： | 24 February 2011 |
Preparation and photocatalytic activity of La and Eu co-doped TiO2 nanoparticles: photo-assisted degradation of methylene blue |
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| Huixian SHI,Tianyong ZHANG,Hongliang WANG.Preparation and photocatalytic activity of La and Eu co-doped TiO2 nanoparticles: photo-assisted degradation of methylene blue[J].Journal of Rare Earths,2011,29(8):746-752. |
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| Authors: | Huixian SHI Tianyong ZHANG Hongliang WANG |
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| Affiliation: | aSchool of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;bDepartment of Nuclear Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China |
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| Abstract: | Rare earth ions La3+ and Eu3+ co-doped TiO2 photocatalyst (La-Eu/TiO2) was prepared by sol-gel method, and characterized by various techniques such as X-ray diffraction (XRD), specific surface area and porosity (BET and BJH), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the La-Eu/TiO2 was evaluated by the degradation of methylene blue (MB) under UV light irradiation. The catalyst had a relatively uniform particle diameter distribution in the range of 40–60 nm. When calcining at 600°C, the XRD patterns of La-Eu/TiO2 indicated the anatase phase, while the XPS patterns showed the Ti4+, La3+ and Eu3+ ions existence. The DRS spectra showed red shift in the band-gap transition. The experimental results of MB degradation demonstrated that the photocatalytic activity of La-Eu/TiO2 was significantly enhanced due to better separation of photogenerated electron-hole pairs. |
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| Keywords: | lanthanum europium titania photocatalytic activity degradation methylene blue rare earths |
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