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Characteristics of TiO2-SiO2 Microparticle Composites Using Different Types of SiO2 Particle

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Author(s): J. Janlamool | B. Jongsomjit

Journal: Science Journal Ubon Ratchathani University
ISSN 1906-9294

Volume: 1;
Issue: 2;
Start page: 35;
Date: 2010;
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Keywords: Titania | Silica | MCM41 | Hydrolysis | Phase transformation.

ABSTRACT
The TiO2-SiO2 microparticle composites were prepared by deposition of TiO2 particles on thespherical silica particle (SSP) and MCM41 surface using hydrolysis of titanium isopropoxide to obtainTiSSP and TiMCM, respectively. The TiO2-modified metal-surface interaction of SiO2 exhibited thesufficient surface area and pore volume, even decrease with increased calcination temperature. Theanatase crystallites of titania on TiSSP and TiMCM began to form at 650 C. At calcinationtemperature of 900 C, the appearance of a portion of TiO2 had the form of rutile, which was onlyfound in the TiSSP. However, the surface areas of TiSSP and TiMCM calcined at 900 C wereremarkably low at 11 and 56 m2/g, respectively. The XRD patterns and DTA/TG indicated thatTiMCM had better thermal stability than TiSSP. The titania distribution of both samples was uniform.
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