Preparation and photocatalytic activity of La3+ and Eu3+ co-doped TiO2 nanoparticles: photo-assisted degradation of methylene blue

被引：7
|
作者：
史慧贤 [1 ]
张天永 [1 ]
王红亮 [2 ]
机构：
[1] School of Chemical Engineering and Technology, Tianjin University
[2] Department of Nuclear Medicine, The First Affiliated Hospital of Sun Yat-sen University
来源：
JournalofRareEarths | 2011年 / 29卷 / 08期
关键词：
lanthanum; europium; titania; photocatalytic activity; degradation; methylene blue; rare earths;
D O I：
暂无
中图分类号：
O643.32 [催化反应];
学科分类号：
摘要：
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℃, 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.
引用
收藏
页码：746 / 752
页数：7
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