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 3-4 337-342

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Ämneskategorier

Fysik

DOI

10.1016/j.apcatb.2011.05.036