Photochemical quartz crystal microbalance study of the nanocrystalline titanium dioxide semiconductor electrode/water interface: Simultaneous photoaccumulation of electrons and protons

Buford I. Lemon, Joseph T. Hupp

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Photochemical quartz crystal microbalance (PQCM) studies of nanocrystalline titanium dioxide films show evidence of charge-compensating cation intercalation during photolytically induced accumulation layer formation. The manifestation and magnitude of mass uptake (intercalation) are dependent, respectively, on the illumination and intensity of illumination provided. Isotope experiments performed in H2O and D2O unambiguously identify the cations as protons and deuterons. The experiments extend earlier experiments with dark TiO2 (and other metal oxide semiconductors) that have implicated cation intercalation as the primary process involved in charge compensation under accumulation conditions.

Original languageEnglish
Pages (from-to)14578-14580
Number of pages3
JournalThe Journal of Physical Chemistry®
Issue number35
Publication statusPublished - Jan 1 1996


ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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