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Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study
Author(s): Fabian Sieland; Jenny Schneider; Thorsten Lippmann; Detlef W. Bahnemann
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Paper Abstract

In the focus of this study, mixtures of commercially available TiO2 powders were created and their photocatalytic activity concerning the acetaldehyde degradation in the gas phase was tested. Further, the lifetime of the photogenerated charge carriers was analyzed by Laser-Flash-Photolysis-Spectroscopy. The acetaldehyde degradation experiments of the mixed powders lead to positive and negative deviations from the expected weighted mean. Nevertheless, their photocatalytic activity could be correlated with the lifetime of the charge carriers. A longer charge carrier lifetime at ambient conditions correlated with a lower fractional conversion of acetaldehyde. The advantageous activities of the samples were associated with a charge transfer reaction between larger and smaller particles comparable to the antenna mechanism.1

Paper Details

Date Published: 26 September 2016
PDF: 10 pages
Proc. SPIE 9935, Solar Hydrogen and Nanotechnology XI, 99350G (26 September 2016); doi: 10.1117/12.2239261
Show Author Affiliations
Fabian Sieland, Leibniz Univ. Hannover (Germany)
Jenny Schneider, Leibniz Univ. Hannover (Germany)
Thorsten Lippmann, Leibniz Univ. Hannover (Germany)
Detlef W. Bahnemann, Leibniz Univ. Hannover (Germany)
Saint Petersburg State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 9935:
Solar Hydrogen and Nanotechnology XI
Chung-Li Dong, Editor(s)

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