Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study

Fabian Sieland; Jenny Schneider; Thorsten Lippmann; Detlef W. Bahnemann

doi:10.1117/12.2239261

26 September 2016 Understanding charge transfer processes on metal oxides: a laser-flash-photolysis study

Fabian Sieland, Jenny Schneider, Thorsten Lippmann, Detlef W. Bahnemann

Author Affiliations +

Proceedings Volume 9935, Solar Hydrogen and Nanotechnology XI; 99350G (2016) https://doi.org/10.1117/12.2239261
Event: SPIE Optics + Photonics for Sustainable Energy, 2016, San Diego, California, United States

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

Citation Download Citation

Fabian Sieland, Jenny Schneider, Thorsten Lippmann, and 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); https://doi.org/10.1117/12.2239261

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