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Title: Mechanism(s) of Photocatalytic Processes: Revisited!
Originating Office: IAS
Speaker: Bahnemann, Detlef
Issue Date: 20-May-2016
Event Date: 20-May-2016
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 EF
Notes: IAS distinguished lecture.
Title from opening screen.
Abstract: Charge carrier transfer processes are very important and play a vital role in photocatalytic reactions. The fundamental study of the dynamics of these charge transfer processes is thus crucial from the viewpoint of developing efficient photocatalytic systems for largescale industrialization. The current presentation mainly reviews recent efforts on understanding the charge transfer kinetics in photocatalytic processes. Some fundamental aspects involved in charge transfer processes, such as charge carrier generation, charge carrier trapping, charge carrier recombination, and electron and hole transfer are discussed based on the results published in the past decades. Moreover, recent studies focusing on the enhancement of the photocatalytic efficiency by improving the charge carrier transfer and separation will also be discussed here. Noble metal loading, plasmonic structure and graphene loading have been found to be efficient methods to improve charge carrier separation and to suppress charge carrier recombination. Although there have been significant advances in the research of charge transfer dynamics, there are still many processes not fully understood, especially on the molecular-level. There are, for example, hardly any studies associated with electron and hole transfer kinetics in photocatalytic reactions on single crystal TiO2 surfaces. Most researchers have studied the charge transfer kinetics on a very short timescale, while the charge transfer on a more extended timescale is still unclear. In this lecture, the speaker highlights the importance of charge transfer processes in photocatalytic reactions, the understanding of which can provide possibilities to significantly improve photocatalytic efficiencies.
Prof Detlef Bahnemann received his PhD in Chemistry from the Technical University Berlin in 1981. From 1988 to 2002, he was Head of Department of Photochemistry and Thin Film Technology at the Institute for Solar Energy Research in Hannover, in charge of the Photocatalysis Research Group. He then joined the Institute of Technical Chemistry, Leibniz University of Hannover as the Head of Photocatalysis and Nanotechnology Research Unit, where he has also been Supernumerary Professor in the Faculty of Natural Sciences since 2014.
Prof Bahnemann is an author of more than 290 publications in refereed journals and in books and more than 100 other publications with a current Hirsch-Factor (h-Index) of 60 (papers have been cited around 25,000 times altogether) according to Web-of-Science. According to Google Scholar Citations, his current Hirsch-Factor (h-Index) is 69 and his papers have been cited more than 33,000 times altogether.
Duration: 84 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures