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Title: Photocatalytic Activity of Bulk TiO{sub 2} Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy

Abstract

A systematic study on the photocatalytic activity of well-defined, macroscopic bulk single-crystal TiO{sub 2} 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 CO{sub 2} than the rutile (110) surface. This surprisingly large difference in activity tracks the bulk e-h pair lifetime difference for the two TiO{sub 2} modifications as determined by contactless transient photoconductance measurements on the corresponding bulk materials.

Authors:
;  [1]; ;  [2];  [3];  [1];  [4];  [5]
  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)
Publication Date:
OSTI Identifier:
21550265
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 13; Other Information: DOI: 10.1103/PhysRevLett.106.138302; (c) 2011 American Institute of Physics; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ABSORPTION SPECTROSCOPY; CARBON DIOXIDE; CARBON MONOXIDE; LIFETIME; MONOCRYSTALS; OXIDATION; PARTICLE TRACKS; PHOTOCATALYSIS; PHOTOCHEMISTRY; PHOTOCONDUCTIVITY; PHOTONS; RUTILE; SEMICONDUCTOR MATERIALS; SURFACES; TITANIUM OXIDES; TRANSIENTS; 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

Citation Formats

Mingchun, Xu, Youkun, Gao, Moreno, Elias Martinez, Kunst, Marinus, Muhler, Martin, Yuemin, Wang, Laboratory of Industrial Chemistry, Ruhr-Universitaet Bochum, 44780, Idriss, Hicham, and Woell, Christof. Photocatalytic Activity of Bulk TiO{sub 2} Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy. United States: N. p., 2011. Web. doi:10.1103/PHYSREVLETT.106.138302.
Mingchun, Xu, Youkun, Gao, Moreno, Elias Martinez, Kunst, Marinus, Muhler, Martin, Yuemin, Wang, Laboratory of Industrial Chemistry, Ruhr-Universitaet Bochum, 44780, Idriss, Hicham, & Woell, Christof. Photocatalytic Activity of Bulk TiO{sub 2} Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy. United States. doi:10.1103/PHYSREVLETT.106.138302.
Mingchun, Xu, Youkun, Gao, Moreno, Elias Martinez, Kunst, Marinus, Muhler, Martin, Yuemin, Wang, Laboratory of Industrial Chemistry, Ruhr-Universitaet Bochum, 44780, Idriss, Hicham, and Woell, Christof. Fri . "Photocatalytic Activity of Bulk TiO{sub 2} Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy". United States. doi:10.1103/PHYSREVLETT.106.138302.
@article{osti_21550265,
title = {Photocatalytic Activity of Bulk TiO{sub 2} Anatase and Rutile Single Crystals Using Infrared Absorption Spectroscopy},
author = {Mingchun, Xu and Youkun, Gao and Moreno, Elias Martinez and Kunst, Marinus and Muhler, Martin and Yuemin, Wang and Laboratory of Industrial Chemistry, Ruhr-Universitaet Bochum, 44780 and Idriss, Hicham and Woell, Christof},
abstractNote = {A systematic study on the photocatalytic activity of well-defined, macroscopic bulk single-crystal TiO{sub 2} 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 CO{sub 2} than the rutile (110) surface. This surprisingly large difference in activity tracks the bulk e-h pair lifetime difference for the two TiO{sub 2} modifications as determined by contactless transient photoconductance measurements on the corresponding bulk materials.},
doi = {10.1103/PHYSREVLETT.106.138302},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 13,
volume = 106,
place = {United States},
year = {2011},
month = {4}
}