Lanthanide oxide-doped titanium dioxide: Effective photocatalysts for the degradation of organic pollutants

被引:90
作者
Ranjit, KT
Cohen, H
Willner, I [1 ]
Bossmann, S
Braun, AM
机构
[1] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel
[2] Hebrew Univ Jerusalem, Farkas Ctr Light Induced Proc, IL-91904 Jerusalem, Israel
[3] Weizmann Inst Sci, Chem Serv Unit, IL-76100 Rehovot, Israel
[4] Univ Karlsruhe, Engler Bunte Inst, Lehrstuhl Umweltmesstech, D-76128 Karlsruhe, Germany
关键词
D O I
10.1023/A:1004780401030
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A series of lanthanide oxide-doped titanium dioxide photocatalysts Ln(2)O(3)/TiO2 (Ln(3+) = Eu3+, Pr3+, Yb3+) were prepared. The photocatalysts reveal a substantially enhanced activity for the degradation of organic pollutants, as compared to undoped TiO2. The photodegradation processes of p-nitrobenzoic acid, (1), p-chlorophenoxyacetic acid, (2), aniline, (3), salicylic acid, (4), and trans-cinnamic acid, (5), with the different photocatalysts was examined. The photodegradation of (1)-(5) is significantly faster with Ln(2)O(3)/TiO2 photocatalysts and leads to complete mineralization of the organic compounds. The high activity of the Ln(2)O(3)/TiO2 photocatalysts is attributed to the enhanced association of the functionalized organic pollutants to lanthanide-ion surface sites. (C) 1999 Kluwer Academic Publishers.
引用
收藏
页码:5273 / 5280
页数:8
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