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

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

1 Scopus citations

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.

Original languageEnglish
Title of host publicationSolar Hydrogen and Nanotechnology XI
PublisherSPIE
Volume9935
ISBN (Electronic)9781510602618
DOIs
StatePublished - 2016
EventSolar Hydrogen and Nanotechnology XI - San Diego, United States
Duration: 28 Aug 201630 Aug 2016

Conference

ConferenceSolar Hydrogen and Nanotechnology XI
CountryUnited States
CitySan Diego
Period28/08/1630/08/16

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • Acetaldehyde degradation
  • Charge transfer
  • Kinetics
  • Laser-flash-photolysis-spectroscopy
  • Photocatalysis
  • Semiconductor

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