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：

081705 ;

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

页码：746 / 752

页数：7

共 14 条

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