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

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

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
JournalJournal of Physical Chemistry
Volume100
Issue number35
Publication statusPublished - 1996

Fingerprint

Quartz crystal microbalances
Intercalation
quartz crystals
titanium oxides
intercalation
microbalances
Titanium dioxide
Cations
Protons
Positive ions
Semiconductor materials
cations
Electrodes
electrodes
protons
Electrons
Water
Lighting
illumination
water

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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