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

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

研究成果: Contribution to journalArticle査読

47 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)3493-3500
ページ数8
ジャーナルChemistry of Materials
14
8
DOI
出版ステータス出版済み - 8 1 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 化学工学(全般)
  • 材料化学

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