Detlef W. Bahnemann
Professor
Saint Petersburg State University
Saint Petersburg State University
Detlef W. Bahnemann 教授
Saint Petersburg State University, Russian Federation
The photocatalysis and nanotechnology working group headed by Prof. Detlef Bahnemann is concerned with the synthesis of semiconductor and metal nanoparticles from molecular precursors (bottom-up approach) at the Institute for Technical Chemistry at Leibniz University Hannover. These materials are then used, among other things, to produce (usually transparent) layers on a wide variety of substrates. In these syntheses, large (and usually very reactive) surfaces are achieved, for example by generating mesoporous structures. Of all the titanium dioxide modifications intensively investigated in the working group, brookite has particularly interesting properties because, due to the very cathodic position of its conduction band, it can form molecular hydrogen in high yields without any auxiliary voltage.
In addition to photoelectrochemical investigations, the working group is particularly specialized in the field of laser flash photolysis; Both investigation methods are used to determine the charge carrier formation and transfer kinetics. In addition to photocatalytic water and air purification, the main topics of the working group are currently solar fuel synthesis, i.e. direct photocatalytic and photoelectrochemical water splitting. Here, the investigation of the underlying reaction mechanisms is the focus of interest. In the BMBF project DuaSol, the photocatalytic hydrogen generation is combined with the breakdown of organic pollutants in polluted water streams, while the SolHyd project (BMBF) investigates the use of hematite as an oxidation catalyst in detail. In addition, the photocatalysis and nanotechnology working group is involved in the DFG priority program "Fuels Produced Regeneratively Through Light-Driven Water Splitting: Clarification of the Elemental Processes Involved and Prospects for Implementation in Technological Concepts" (SPP 1613). Together with the working group of Prof. Wonyong Choi from POSTECH (South Korea), AK Bahnemann is working in a so-called Global Research Laboratory (GRL) on the practical implementation of different concepts of solar fuel synthesis.
In addition to photoelectrochemical investigations, the working group is particularly specialized in the field of laser flash photolysis; Both investigation methods are used to determine the charge carrier formation and transfer kinetics. In addition to photocatalytic water and air purification, the main topics of the working group are currently solar fuel synthesis, i.e. direct photocatalytic and photoelectrochemical water splitting. Here, the investigation of the underlying reaction mechanisms is the focus of interest. In the BMBF project DuaSol, the photocatalytic hydrogen generation is combined with the breakdown of organic pollutants in polluted water streams, while the SolHyd project (BMBF) investigates the use of hematite as an oxidation catalyst in detail. In addition, the photocatalysis and nanotechnology working group is involved in the DFG priority program "Fuels Produced Regeneratively Through Light-Driven Water Splitting: Clarification of the Elemental Processes Involved and Prospects for Implementation in Technological Concepts" (SPP 1613). Together with the working group of Prof. Wonyong Choi from POSTECH (South Korea), AK Bahnemann is working in a so-called Global Research Laboratory (GRL) on the practical implementation of different concepts of solar fuel synthesis.
