ELECTROCHEMICAL INVESTIGATION OF THE ENERGIES OF PARTICULATE TITANIUM DIOXIDE PHOTOCATALYSTS. THE METHYL VIOLOGEN-ACETATE SYSTEM.

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

Research output: Contribution to journalArticle

Abstract

Addition of methyl viologen (MV**2** plus ) enhances the currents observed for TiO//2 suspensions under ilumination by trapping of photogenerated electrons with formation of MV** plus . The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and E//r//e//d//o//x of the MV**2** plus /MV** plus multiplied by (times) couple. The location of the Fermi level and the analysis powders was estimated as minus 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
StatePublished - Jan 1 1983

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Paraquat
Photocatalysts
Fermi level
Titanium dioxide
Acetates
Photocurrents
Semiconductors
Powders
Suspensions
Electrons
Light
Semiconductor materials
titanium dioxide
methyl acetate

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

ELECTROCHEMICAL INVESTIGATION OF THE ENERGIES OF PARTICULATE TITANIUM DIOXIDE PHOTOCATALYSTS. THE METHYL VIOLOGEN-ACETATE SYSTEM. / Ward, Michael; White, James R.; Bard, Allen J.

In: Journal of the American Chemical Society, Vol. 105, No. 1, 01.01.1983, p. 27-31.

Research output: Contribution to journalArticle

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