Titanium dioxide films made from reverse micelles and their use for the photocatalytic degradation of adsorbed dyes

被引：61
|
作者：
Stathatos, E
Tsiourvas, D
Lianos, P [1 ]
机构：
[1] Univ Patras, Dept Engn Sci, Patras 26500, Greece
[2] NCSR Demokritos, Inst Phys Chem, Athens 15310, Greece
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 149卷 / 1-3期
关键词：
reverse micelles; photocatalysis; titania films;
D O I：
10.1016/S0927-7757(98)00292-1
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：
Titanium dioxide mesoporous films have been deposited on glass slides by dip-coating in reverse micellar gels containing titanium isopropoxide. Reverse micelles were first made in cyclohexane, and the alkoxide was added last. Hydrolysis and inorganic polymerization produced composite organic/inorganic gels that were deposited on glass slides giving uniform transparent films. Calcination at 450 degrees C gave TiO2, nanoparticle mesoporous films. The films possessed a high capacity for adsorption of several different dyes from aqueous or alcoholic solutions. Illumination of the colored films by visible light led to a rapid degradation of the adsorbed dyes. The phenomenon is explained by a photosensitisation process involving the semiconductor and the adsorbed dye itself [N. Chouhaid, K. Vinodgopal, L. Fisher, S. Hotchandani, A.K. Chattopadhyay, P. Kamat, J. Phys. Chem. 100 (1996) 8436]. The differences between films made by varying some parameters are discussed. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：49 / 56
页数：8
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