Electrochemical Investigation of the Energetics of Particulate Titanium Dioxide Photocatalysts. The Methyl Viologen-Acetate System

Michael D. Ward, James R. White, Allen J. Bard

Research output: Contribution to journalArticle

Abstract

Addition of methyl viologen (MV2+) enhances the anodic currents observed for TiO2 suspensions under illumination by trapping of photogenerated electrons with formation of MV+·. The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and Eredox of the MV2+/MV+· couple. The location of the Fermi level in the anatase powders was estimated as -0.05 V vs. NHE (pH 0) based on the observed variation of photocurrent with pH. The shift in the quasi-Fermi level with light intensity is also discussed.

Original languageEnglish (US)
Pages (from-to)27-31
Number of pages5
JournalJournal of the American Chemical Society
Volume105
Issue number1
DOIs
StatePublished - Jan 1983

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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