Eco-friendly TiO2-AC Photocatalyst for the Selective Photooxidation of 4-Chlorophenol

被引：76

作者：

Matos, Juan ^{[1
]}

Garcia, Andreina ^{[1
]}

Cordero, Tulynan

Chovelon, Jean-Marc ^{[2
]}

Ferronato, Corinne ^{[2
]}

机构：

[1] Venezuelan Inst Sci Res, Photocatalysis Lab, Ctr Chem, IVIC, Caracas 1020A 20632, Venezuela

[2] Univ Lyon, IRCELYON, CNRS, UMR 5256, F-69626 Villeurbanne, France

来源：

CATALYSIS LETTERS | 2009年 / 130卷 / 3-4期

关键词：

Selectivity; Photocatalysis; TiO2; Activated carbon; 4-Chlorophenol; ACTIVATED CARBONS; DEGRADATION; TITANIA; PHENOL;

D O I：

10.1007/s10562-009-9989-8

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：

The influence of surface pH of activated carbon on selectivity of TiO2 during the photooxidation of 4-chlorophenol on UV-irradiation was studied. Chlorine substitution by p-hydroxylation yielding hydroquinone in equilibrium with benzoquinone and o-hydroxylation to 4-chlorocathecol were detected as the main intermediates in the photooxidation of 4CP. Changes in surface pH of carbons from basic to closely neutral induce a remarkably increase in the production of 4-chlorocatechol by a factor of 22 on TiO2-AC in comparison of TiO2 alone. A mechanism of interaction between both solids is proposed to explain changes both in photoactivity and photoselectivity of TiO2. In conclusion, results showed that TiO2-AC can be used as an alternative green photocatalyst in organic synthesis.

引用

页码：568 / 574

页数：7

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