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.
anatase tio2
arrays
water
excitation
luminescence
Photoluminescence
TiO(2)-carbon composites
spectroscopy
Photocatalysis
Charge
carriers lifetime
carbon
Charge transfer mechanism
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 (SSIF 2011)
Fysik
DOI
10.1016/j.apcatb.2011.05.036