Zusammenfassung: | |
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. © 2016 SPIE.
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Lizenzbestimmungen: | Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich. |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2016 |
Schlagwörter (englisch): | Acetaldehyde degradation, Charge transfer, Kinetics, Laser-flash-photolysis-spectroscopy, Photocatalysis, Semiconductor, Carrier lifetime, Charge carriers, Charge transfer, Enzyme kinetics, Gases, Nanotechnology, Photocatalysis, Photodegradation, Photolysis, Powder metals, Powders, Semiconductor lasers, Semiconductor materials, Solar power generation, Acetaldehyde degradation, Charge transfer process, Charge-transfer reactions, Fractional conversion, Laser flash photolysis, Negative deviations, Photocatalytic activities, Photogenerated charge carriers, Acetaldehyde |
Fachliche Zuordnung (DDC): | 530 | Physik |
Kontrollierte Schlagwörter: | Konferenzschrift |
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