Preparation of SiO2-TiO2 aerogels using supercritical impregnation

Satoshi Yoda, Katsuto Ohtake, Yoshihiro Takebayashi, Tsutomu Sugeta, Takeshi Sako, Tsugio Sato

Research output: Contribution to journalConference articlepeer-review

25 Citations (Scopus)

Abstract

The preparation of SiO2-TiO2 aerogels by supercritical impregnation of titanium alkoxides into silica alcogels was investigated. A mixture of CO2 and 2-propanol with dissolved titanium tetraisopropoxide modified with acetylacetone was used as the impregnation medium. Prior to the experiments, the supercritical behaviour of the impregnation solution was investigated. The microstructure and properties of aerogels prepared by the supercritical impregnation method were almost identical to those generated by the liquid impregnation. However, the time for impregnation was substantially decreased and the homogeneity of the impregnated titanium distribution on the aerogel increased.

Original languageEnglish
Pages (from-to)719-723
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Volume19
Issue number1-3
DOIs
Publication statusPublished - 2000 Dec
Event10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels - Yokohama, Jpn
Duration: 1999 Sep 201999 Sep 24

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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