A study on the photocatalytic reactions of TiO2 with certain pyrimidine bases:: effects of dopants (Fe3+) and calcination

被引：32

作者：

Dhananjeyan, MR ^{[1
]}

Kandavelu, V ^{[1
]}

Renganathan, R ^{[1
]}

机构：

[1] Bharathidasan Univ, Dept Chem, Tiruchirappalli 620024, Tamil Nadu, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 151卷 / 1-2期

关键词：

TiO2; pyrimidine bases; dopants;

D O I：

10.1016/S1381-1169(99)00246-0

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 steady-state photolytic investigation using TiO2 as the photocatalyst in its reaction with uracil, thymine, 6-methyluracil and cytosine in an aqueous suspension has been carried out. Influence of initial [cytosine], amount of TiO2 added and pH on the reaction rate and Phi were evaluated. The photoprocess obeys the Langmuir-Hinshelwood isotherm. Fe3+-doped TiO2 prepared by the impregnation method was found to have a modified photocatalytic activity in the photooxidation of all the above-mentioned pyrimidine bases. The effect of calcination (preheat treatment) of the TiO2 photocatalyst was a rate retardation. The role of these parameters on surface properties of TiO2 is suitably explained. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：217 / 223

页数：7

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