TiO2/MgO composite photocatalyst:: the role of MgO in photoinduced charge carrier separation

被引：99

作者：

Bandara, J ^{[1
]}

Hadapangoda, CC ^{[1
]}

Jayasekera, WG ^{[1
]}

机构：

[1] Inst Fundamental Studies, Kandy, Sri Lanka

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2004年 / 50卷 / 02期

关键词：

photodegradation; chlorophenol; titanium dioxide; magnesium oxide;

D O I：

10.1016/j.apcatb.2003.12.021

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：

In order to minimize the charge recombination, a new bilayer TiO2/MgO nanoporous catalyst was fabricated in which the thin layer of insulating MgO on TiO2 acts as electron trap and barrier for recombination, enhancing the overall photocatalytic activity of TiO2. The photocatalytic activity of MgO coated TiO2 has been studied for the oxidation of 2-chlorophenol, 2,4-dichlorophenol (2,4-DCP) and 4-aminobenzoic acid in aqueous solution. The photocatalytic activity is highly dependent on the thickness of the MgO layer and a plausible mechanism of degradation is discussed. (C) 2004 Published by Elsevier B.V.

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页码：83 / 88

页数：6

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