Article (Scientific journals)
SYNTHESIS OF SIO2-TIO2 XEROGELS BY SOL-GEL PROCESS
Pirson, Alain; MOHSINE, Abdel; Marchot, Pierre et al.
1995In Journal of Sol-Gel Science and Technology, 4 (3), p. 179-185
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Keywords :
GELATION TIME; IR ANALYSIS; CRYSTALLIZATION; TEXTURAL PROPERTIES; SIO2-TIO2 GLASSES SYNTHESIS
Abstract :
[en] A new method to synthesize SiO2-TiO2 gels by sol-gel process has been developed. This technique uses tetraisopropylorthotitanate [Ti(O'Pr)(4)] and tetraethylorthosilicate [TEOS]: they are mixed in the same solvent and then directly hydrolysed. This one-step reaction is possible because of the use of 2-methoxyethanol, a protic polar solvent. This alcohol plays two different specific roles: it acts as a solvent as well as a stabilizer of titanium alkoxide towards the hydrolysis-precipitation reaction. So, by an accurate adjustment of the quantity of methoxyethanol in the mixture, we can control the reactivity of the titanium precursor. Monolithic and transparent xerogels were obtained whatever the composition. Three monolithic SiO2-TiO2 gels containing 20, 50 and 75 mol% of TiO2 were prepared and studied in details. By using the TG-DSC analysis, we can follow the evolution of the loss of water and organic residues. The structural evolution of gels during calcination is characterized by IR spectroscopy and X-Ray diffraction.
Disciplines :
Chemical engineering
Materials science & engineering
Author, co-author :
Pirson, Alain ;  Université de Liège - ULiège > Department of Chemical Engineering > Chimie industrielle
MOHSINE, Abdel;  Université de Liège - ULiège > Département de Chimie appliquée > Génie chimique - Chimie physique appliquée
Marchot, Pierre ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques
Michaux, Bernard
Van Cantfort, Olivier
Pirard, Jean-Paul ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
LECLOUX, A. J.
Language :
English
Title :
SYNTHESIS OF SIO2-TIO2 XEROGELS BY SOL-GEL PROCESS
Publication date :
1995
Journal title :
Journal of Sol-Gel Science and Technology
ISSN :
0928-0707
eISSN :
1573-4846
Publisher :
Kluwer Academic Publ, Dordrecht, Netherlands
Volume :
4
Issue :
3
Pages :
179-185
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 31 August 2009

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