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Researchers from Leibniz University Detail Findings in Photocatalytics [Evaluation of the photocatalytic (visible-light) activity of cold gas sprayed...

August 6, 2014



Researchers from Leibniz University Detail Findings in Photocatalytics [Evaluation of the photocatalytic (visible-light) activity of cold gas sprayed TiO2 layers on metal sheets]

By a News Reporter-Staff News Editor at Electronics Newsweekly -- Current study results on Photocatalytics have been published. According to news reporting from Hannover, Germany, by VerticalNews journalists, research stated, "The photocatalytic properties of titanium dioxide layers on metal sheets prepared via cold gas spraying have been investigated employing the ISO 22197-2 standard test for acetaldehyde degradation in the gas phase. The contact between the TiO2 and the metal substrate can be described as a Schottky contact."

The news correspondents obtained a quote from the research from Leibniz University, "A depletion region is formed at the semiconductor-metal interface leading to an enhanced separation of the photoinduced charge carriers. Thus, the lifetime of the e(-)/h(+) pair is prolonged. The variation of process parameters, such as temperature and pressure, during the CGS preparation leads to different photocatalytic properties of the obtained TiO2 layers. Under high pressure and temperature even visible light active TiO2 coatings are prepared. The CGS technique allows the formation of thin TiO2 films without any binders exhibiting high photocatalytic activities in the same range as the pure powders employed for their preparation. [GRAPHICS] Schematic diagram presenting the Schottky contact of an n-type semiconductor and metal. E-f is the Fermi level, VB and CB are the valence and conduction band of the semiconductor, respectively."

According to the news reporters, the research concluded: "A proposed degradation pathway of acetaldehyde at the solid/gas interface is depicted."

For more information on this research see: Evaluation of the photocatalytic (visible-light) activity of cold gas sprayed TiO2 layers on metal sheets. Physica Status Solidi-Rapid Research Letters, 2014;8(6):596-599. Physica Status Solidi-Rapid Research Letters can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany.

Our news journalists report that additional information may be obtained by contacting J. Freitag, Leibniz Univ Hannover, Inst Technical Chem, D-30167 Hannover, Germany.

Keywords for this news article include: Europe, Germany, Hannover, Electronics, Photocatalyst, Semiconductor, Nanotechnology, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Electronics Newsweekly


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