Crystal phase control for titanium dioxide films by direct deposition in aqueous solutions

Satoshi Yamabi, Hiroaki Imai

Research output: Contribution to journalArticlepeer-review

177 Citations (Scopus)

Abstract

Crystalline titanium dioxide (TiO2) was directly grown on a substrate via heterogeneous nucleation in aqueous solutions with titanyl sulfate at near room temperature. The crystal phase of TiO2 films was essentially determined by the initial pH value and the Ti concentration of the precursor solutions. The rutile and anatase phases were produced in the solutions around their thermodynamic equilibrium conditions between Ti(IV) ionic species and the solid phases. The effect of the deposition rate on the crystal phases was not dominant in this system. On the other hand, the morphology of the TiO2 products was influenced by the reaction rate controlled with the properties of anions as a ligand for titanium cations. Homogeneous rutile and anatase films consisting of highly oriented needlelike crystals were obtained with a relatively slow deposition rate.

Original languageEnglish
Pages (from-to)609-614
Number of pages6
JournalChemistry of Materials
Volume14
Issue number2
DOIs
Publication statusPublished - 2002 Mar 19

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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