Preparation of porous titania film by modified sol-gel method and its application to photocatalyst

Miah Muhammed Yusuf, Hiroaki Imai, Hiroshi Hirashima

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Sol-Gel derived mesoporous titania films with controlled pore sizes were prepared by surfactant templating. The coating sol was obtained by hydrolysis of Ti(OC4H9)4 in ethanol/HCl solution. The gel films, prepared by spin coating on glass substrate, were dried after immersion in surfactant solutions under an atmospheric pressure. The porous films of anatase with columnar and rectangular structure were obtained after annealing at 500°C. The annealed films are transparent and 180-140 nm in thickness. Refractive indices of the films with surfactant immersion were 10-20% lower than those of the films without immersion. The spacing between the columns or rectangular grains and the grain shape were found to depend on the surfactant species. The photo-catalytic activity of the films for the oxidation of NOx was improved by the surfactant modification.

Original languageEnglish
Pages (from-to)65-74
Number of pages10
JournalJournal of Sol-Gel Science and Technology
Volume25
Issue number1
DOIs
Publication statusPublished - 2002 Aug 1

Keywords

  • Anatase
  • Mesoporous films
  • Photocatalyst
  • Sol-gel method
  • Surfactant templating

ASJC Scopus subject areas

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

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