On the mechanism of enhanced photocatalytic activity of composite TiO(2)/carbon nanofilms
Artikel i vetenskaplig tidskrift, 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
Författare
Raja Sellappan
Chalmers, Teknisk fysik, Kemisk fysik
A. Galeckas
Universitetet i Oslo
V. Venkatachalapathy
Universitetet i Oslo
A. Y. Kuznetsov
Universitetet i Oslo
Dinko Chakarov
Chalmers, Teknisk fysik, Kemisk fysik
Applied Catalysis B: Environmental
0926-3373 (ISSN) 1873-3883 (eISSN)
Vol. 106 3-4 337-342Styrkeområden
Nanovetenskap och nanoteknik
Materialvetenskap
Ämneskategorier
Fysik
DOI
10.1016/j.apcatb.2011.05.036