On the mechanism of enhanced photocatalytic activity of composite TiO(2)/carbon nanofilms
Journal article, 2011
In the search for the origin of the enhanced photocatalytic activity of composite TiO(2)-carbon systems, we have fabricated and analyzed well-defined model samples consisting of anatase and graphitic carbon with and without modifying the interface between them by a thin SiO(2) space layer. The films with a TiO(2)/C interface show noticeably lower photoluminescence intensity and shorter carrier life times compared to single TiO(2) films with the same thickness and composition. The stronger non-radiative recombination is mainly assigned to charge carrier leakage (transfer) at the interface between TiO(2) nanocrystallites and the carbon film. (C) 2011 Elsevier B.V. All rights reserved.
carriers lifetime
excitation
anatase tio2
Photocatalysis
photoluminescence
Charge transfer mechanism
TiO(2)-carbon composites
arrays
Charge
carbon
spectroscopy
luminescence
water
Photoluminescence
Author
Raja Sellappan
Chalmers, Applied Physics, Chemical Physics
A. Galeckas
University of Oslo
V. Venkatachalapathy
University of Oslo
A. Y. Kuznetsov
University of Oslo
Dinko Chakarov
Chalmers, Applied Physics, Chemical Physics
Applied Catalysis B: Environmental
0926-3373 (ISSN) 1873-3883 (eISSN)
Vol. 106 3-4 337-342Areas of Advance
Nanoscience and Nanotechnology
Materials Science
Subject Categories
Physical Sciences
DOI
10.1016/j.apcatb.2011.05.036