A general, efficient method of incorporation of metal ions into ultrathin TiO2 films

Junhui He, Izumi Ichinose, Shigenori Fujikawa, Toyoki Kunitake, Aiko Nakao

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

A general, efficient method was developed to incorporate a variety of second metal ions into ultrathin TiO2 films. The thin films were first prepared by the surface sol-gel process from a mixture of the matrix-forming titanium alkoxide and template magnesium alkoxide. Mg2+ ion was removed by acid/base treatment, forming highly efficient and robust ion-exchange sites. A large variety of metal ions, including alkaline, alkaline earth, transition, and rare earth elements, were then incorporated into the thin films by ion exchange with Na+. The amount of incorporation increased with increasing charge of the metal ions. The rate of the ion-exchange process was investigated in the case of Gd3+. The incorporated metal ions were immobilized by thermal treatment at 450°C. The UV absorption edge of the TiO2 film was extended to the visible region by Fe3+ doping and calcination.

Original languageEnglish
Pages (from-to)3493-3500
Number of pages8
JournalChemistry of Materials
Volume14
Issue number8
DOIs
Publication statusPublished - Aug 1 2002
Externally publishedYes

Fingerprint

Ultrathin films
Metal ions
Ion exchange
Thin films
Titanium
Rare earth elements
Calcination
Magnesium
Sol-gel process
Earth (planet)
Heat treatment
Doping (additives)
Ions
Acids

All Science Journal Classification (ASJC) codes

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

Cite this

A general, efficient method of incorporation of metal ions into ultrathin TiO2 films. / He, Junhui; Ichinose, Izumi; Fujikawa, Shigenori; Kunitake, Toyoki; Nakao, Aiko.

In: Chemistry of Materials, Vol. 14, No. 8, 01.08.2002, p. 3493-3500.

Research output: Contribution to journalArticle

He, Junhui ; Ichinose, Izumi ; Fujikawa, Shigenori ; Kunitake, Toyoki ; Nakao, Aiko. / A general, efficient method of incorporation of metal ions into ultrathin TiO2 films. In: Chemistry of Materials. 2002 ; Vol. 14, No. 8. pp. 3493-3500.
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