Published April 1, 2011 | Version v1
Journal article Metadata-only

Photocatalytic Activity of Bulk TiO2 Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy

Creators

  • 1. Department of Physical Chemistry I, Ruhr-Universitaet Bochum, 44780 (Germany)
  • 2. Hahn-Meitner-Institut, Glienicker Strasse 100, D-1000 Berlin 39 (Germany)
  • 3. Laboratory of Industrial Chemistry, Ruhr-Universitaet Bochum, 44780 (Germany)
  • 4. Department of Chemistry, University of Aberdeen and School of Engineering, Robert Gordon University, AB24 3EU Aberdeen, Scotland (United Kingdom)
  • 5. Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe (Germany)

Description

A systematic study on the photocatalytic activity of well-defined, macroscopic bulk single-crystal TiO2 anatase and rutile samples has been carried out, which allows us to link photoreactions at surfaces of well-defined oxide semiconductors to an important bulk property with regard to photochemistry, the life time of e-h pairs generated in the bulk of the oxides by photon absorption. The anatase (101) surface shows a substantially higher activity, by an order of magnitude, for CO photo-oxidation to CO2 than the rutile (110) surface. This surprisingly large difference in activity tracks the bulk e-h pair lifetime difference for the two TiO2 modifications as determined by contactless transient photoconductance measurements on the corresponding bulk materials.

Additional details

Identifiers

DOI
10.1103/PhysRevLett.106.138302;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
106
Journal Issue
13
Journal Page Range
p. 138302-138302.4
ISSN
0031-9007
CODEN
PRLTAO

INIS

Country of Publication
United States
Country of Input or Organization
Syrian Arab Republic
INIS RN
43028372
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ABSORPTION; ABSORPTION SPECTROSCOPY; CARBON DIOXIDE; CARBON MONOXIDE; LIFETIME; MONOCRYSTALS; OXIDATION; PARTICLE TRACKS; PHOTOCATALYSIS; PHOTOCHEMISTRY; PHOTOCONDUCTIVITY; PHOTONS; RUTILE; SEMICONDUCTOR MATERIALS; SURFACES; TITANIUM OXIDES; TRANSIENTS
Descriptors DEC
BOSONS; CARBON COMPOUNDS; CARBON OXIDES; CATALYSIS; CHALCOGENIDES; CHEMICAL REACTIONS; CHEMISTRY; CRYSTALS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTARY PARTICLES; MASSLESS PARTICLES; MATERIALS; MINERALS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIOACTIVE MATERIALS; RADIOACTIVE MINERALS; SORPTION; SPECTROSCOPY; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2011 American Institute of Physics