Fabrication of a TiO2 photocatalyst by anodic oxidation of Ti in an acetic acid electrolyte

Yoshiteru Mizukoshi, Naoya Masahashi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We anodized Ti substrates in an aqueous acetic acid solution to produce photocatalytic TiO2 films. The TiO2 films were comprised of the anatase phase, but the crystallinity and photocatalytic activity were low, in contrast to films produced by Ti anodization in a sulfuric acid electrolyte. After annealing, the anatase film crystallized and the photocatalytic activity was greatly enhanced. For the anodizations carried out in 0.5 and 2M acetic acid, nonzero current was maintained for the duration of anodization, unlike the other concentrations. We interpret this phenomenon as the layered structure formation from the holes on the substrate surface. Highly crystallized anatase TiO2 therein was thought to mainly contribute to photocatalysis.

Original languageEnglish
Pages (from-to)226-232
Number of pages7
JournalSurface and Coatings Technology
Volume240
DOIs
Publication statusPublished - 2014 Feb 15

Keywords

  • Acetic acid
  • Anodic oxidation
  • Crystallization
  • Photocatalyst
  • Titanium dioxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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