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Inorganic gels as precursors of TiO2 photocatalysts prepared by low temperature microwave or thermal treatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
48215 46496 2008 7 PDF Available
Title
Inorganic gels as precursors of TiO2 photocatalysts prepared by low temperature microwave or thermal treatment
Abstract

A simple procedure for preparing active TiO2 photocatalysts is presented. The starting materials were unusual TiO2 gels formed from TiCl4. The use of microwaves for a very short time enhanced the TiO2 crystallinity preventing an increase of particle size and minimizing the decrease of specific surface area. This result makes this preparation very attractive. The formation of the gels was monitored through measurements of viscosity. All the samples were characterized by means of X-ray diffraction, diffuse reflectance spectroscopy and BET specific surface area measurements. The photoactivity of the samples was evaluated using the photodegradation of 4-nitrophenol in liquid–solid regimen and gaseous 2-propanol as probe reactions. Commercial TiO2 Degussa P25 was used for the sake of comparison.

Keywords
Photocatalysis; Photodegradations; TiO2 gels; Microwave treatments
First Page Preview
Inorganic gels as precursors of TiO2 photocatalysts prepared by low temperature microwave or thermal treatment
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 84, Issues 3–4, 1 December 2008, Pages 742–748
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis