Photodegradation of polyaromatic hydrocarbons over thin film of TiO2 nanoparticles;: a study of intermediate photoproducts

被引：66

作者：

Pal, B ^{[1
]}

Sharon, M ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 160卷 / 02期

关键词：

photodegradation; polyaromatic hydrocarbon; TiO2 thin films;

D O I：

10.1016/S1381-1169(00)00280-6

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 saturated aqueous solution of naphthalene and anthracene was studied over thin films of porous TiO2 particles on glass substrate, prepared by sol-gel process. Surface morphology and structural features were studied by SEM, TEM and Laser Raman Spectroscopy. These films have been found to be very efficient and the total photomineralisation of these organics to carbon dioxide and water occurs in air-equilibrated solution within 1 h. Concentration changes linearly with the illumination time, and high rate constants are obtained for the degradation of these organics. The pH of the solution changes with the irradiation time due to the formation of intermediate photoproducts, e.g., 5,8-dihydroxynaphthaquinone, and 9,10-anthraquinone, etc. Photodegradation mechanism and the detection of reaction intermediates have been discussed in details. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：453 / 460

页数：8

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