SiO2–TiO2 binary aerogels: Synthesis in new supercritical fluids and study of thermal stability

A comparative analysis of properties of SiO 2 –TiO 2 binary aerogels prepared by supercritical drying using different supercritical fluids (isopropanol, hexafluoroisopropanol, methyl tert -butyl ether, and CO 2 ) has been performed. The use of different supercritical fluids allows preparation of bot...

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Bibliographic Details
Published inRussian journal of inorganic chemistry Vol. 61; no. 11; pp. 1339 - 1346
Main Authors Yorov, Kh. E., Sipyagina, N. A., Baranchikov, A. E., Lermontov, S. A., Borilo, L. P., Ivanov, V. K.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.11.2016
Springer Nature B.V
Subjects
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Nanocrystals
Synthesis and Properties of Inorganic Compounds
Thermal stability
Titanium dioxide
Titanium oxides
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Summary:A comparative analysis of properties of SiO 2 –TiO 2 binary aerogels prepared by supercritical drying using different supercritical fluids (isopropanol, hexafluoroisopropanol, methyl tert -butyl ether, and CO 2 ) has been performed. The use of different supercritical fluids allows preparation of both homogeneous amorphous SiO 2 –TiO 2 binary aerogels (by supercritical drying in hexafluoroisopropanol and CO 2 ) and composite aerogels containing nanocrystalline anatase (by supercritical drying in isopropanol and methyl tert -butyl ether). The thermal treatment of the aerogels at temperatures up to 600°C does not lead to considerable change in the porous structure and phase composition of the aerogels.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023616110048