Drying processes for preparation of titania aerogel using supercritical carbon dioxide

Yusuke Shimoyama, Yusuke Ogata, Ryota Ishibashi, Yoshio Iwai

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Supercritical carbon dioxide drying was performed for the preparation of titania aerogels from sol-gel routes. The conditions of supercritical carbon dioxide drying were 313-323. K and 7.8-15.5. MPa. The solvents in titania wet gels obtained from the sol-gel routes were replaced by acetone. The titania aerogels obtained from supercritical carbon dioxide drying form needle-like structures. In supercritical carbon dioxide drying, the extraction rates of acetone from the wet gels were measured by using an on-line Fourier transform infrared spectroscope. It was found that the titania aerogels with lower cohesion were induced from the formations of homogenous phase for carbon dioxide. +. acetone system and the lower extraction rates of acetone. Furthermore, titania films were prepared by the depositions of the titania aerogels on ITO-coated PET substrates. The needle-like aerogels with lower cohesion derive the titania film with high surface area.

Original languageEnglish
Pages (from-to)1427-1431
Number of pages5
JournalChemical Engineering Research and Design
Volume88
Issue number10
DOIs
Publication statusPublished - Oct 1 2010

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)

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