26 September 2016 Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study
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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
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Fabian Sieland, Fabian Sieland, Jenny Schneider, Jenny Schneider, Thorsten Lippmann, Thorsten Lippmann, Detlef W. Bahnemann, Detlef W. Bahnemann, } "Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study", Proc. SPIE 9935, Solar Hydrogen and Nanotechnology XI, 99350G (26 September 2016); doi: 10.1117/12.2239261; https://doi.org/10.1117/12.2239261
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