Kinetic studies on the photocatalytic degradation of Direct Yellow 12 in the presence of ZnO catalyst

被引：104

作者：

Rao, A. Nageswara ^{[1
]}

Sivasankar, B. ^{[2
]}

Sadasivam, V. ^{[2
]}

机构：

[1] Sathyabama Univ, Dept Chem, Madras 600119, Tamil Nadu, India

[2] Anna Univ, Dept Chem, Madras 600025, Tamil Nadu, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 306卷 / 1-2期

关键词：

Kinetics; Photocatalysis; Zinc oxide; Direct Yellow 12; AQUEOUS SUSPENSIONS; TITANIUM-DIOXIDE; AZO DYES; WATER; TIO2; PHOTODEGRADATION; OXIDATION;

D O I：

10.1016/j.molcata.2009.02.028

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 photocatalytic degradation of Direct Yellow12 (DY12) was studied by a batch process using ZnO as the catalyst on irradiation with UV light. The influence of pH, catalyst weight and initial concentration of the dye on the degradation of the dye was investigated. The degradation of the dye was found to be effective in alkaline media. The dye degradation obeyed first order kinetics and explained on the basis of Langmuir-Hinshelwood mechanism. The oxidants involved were identified as positive hole, hydroxyl radical and superoxide anion radical. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：77 / 81

页数：5

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