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
相关论文
共 50 条
[11]  
FORMENTI M, 1971, J CHEM TECHNOL, P680
[12]   HETEROGENEOUS PHOTOCATALYSIS [J].
FOX, MA ;
DULAY, MT .
CHEMICAL REVIEWS, 1993, 93 (01) :341-357
[13]   IMPROVED CHARGE SEPARATION AND PHOTOSENSITIZED H-2 EVOLUTION FROM WATER WITH TIO2 PARTICLES ON COLLOIDAL SIO2 CARRIERS [J].
FRANK, AJ ;
WILLNER, I ;
GOREN, Z ;
DEGANI, Y .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (12) :3568-3573
[14]  
GRATZEL M, 1990, J PHYS CHEM-US, V94, P2566, DOI 10.1021/j100369a064
[15]   Chemistry and applications of photocatalytic oxidation of thin organic films [J].
Heller, A .
ACCOUNTS OF CHEMICAL RESEARCH, 1995, 28 (12) :503-508
[16]   ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].
HOFFMANN, MR ;
MARTIN, ST ;
CHOI, WY ;
BAHNEMANN, DW .
CHEMICAL REVIEWS, 1995, 95 (01) :69-96
[17]   SPIN TRAPPING AND ELECTRON-SPIN RESONANCE DETECTION OF RADICAL INTERMEDIATES IN THE PHOTO-DECOMPOSITION OF WATER AT TIO2 PARTICULATE SYSTEMS [J].
JAEGER, CD ;
BARD, AJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1979, 83 (24) :3146-3152
[18]   HETEROGENEOUS PHOTOCATALYSIS - ENHANCED H-2 PRODUCTION IN TIO2 DISPERSIONS UNDER IRRADIATION - THE EFFECT OF MG PROMOTER AT THE SEMICONDUCTOR INTERFACE [J].
KIWI, J ;
GRATZEL, M .
JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (04) :637-640
[19]   PHOTOLYSIS OF CHLOROFORM AND OTHER ORGANIC-MOLECULES IN AQUEOUS TIO2 SUSPENSIONS [J].
KORMANN, C ;
BAHNEMANN, DW ;
HOFFMANN, MR .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1991, 25 (03) :494-500
[20]   THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. [J].
Langmuir, Irving .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1918, 40 :1361-1403