The effect of lanthanide on the degradation of RB in nanocrystalline Ln/TiO2 aqueous solution

被引：89

作者：

Zhang, YH ^{[1
]}

Xu, HL ^{[1
]}

Xu, YX ^{[1
]}

Zhang, HX ^{[1
]}

Wang, YG ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2005年 / 170卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Ln/TiO2; degradation; rhodamine B;

D O I：

10.1016/j.jphotochem.2004.09.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of Nd3+, Pr3+, Er3+, and Dy3+ (0.25-5 at.%) homogeneously doped nanocrystalline titanium dioxides (Ln/TiO2) were prepared by an easy sol-gel technique, and the roles of lanthanide doping on the photocatalytic activity in the degradation of rhodamine B (RB) in aqueous solution were studied. Both the concentration of the lanthanide dopant and calcination temperature showed significant effect to the photodegradation of RB. The photocatalytic activity of pure titania was drastically decreased when calcination temperature was at 700 degrees C, while the high photocatalytic activity was still maintained for lanthanide-doped samples. HPLC-MS method was used to study the degradation process, and it is demonstrated that the degradation of RB catalyzed by Ln/TiO2 was principally go through with a stepwise de-ethylation photochemical process. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：279 / 285

页数：7

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