Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.12: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

Photocatalytic CO₂ reduction investigatet with in situ ATR IR spectroscopy — •Leo Pöttinger — PCI Universität Heidelberg, Deutschland, Heidelberg

The recycling of CO₂ e.g. from exhaust gases to hydrocarbons or even fuels like methanol or methane is of high interest. The chemical storage of energy in fuels with renewable energies is considered. Cheap and good availabe semiconductors like TiO₂ are known to reduce CO₂ when illuminated with UV light to hydrocarbons. ATR IR spectroscopy is used to investigate the interface of porous TiO₂ layer and in water dissolved CO₂ . With an in situ flow through cell and light irradiation the reduction process can be tracked. With FTIR ATR spectroscopy vibrational bands are used to identify arising intermediates on the surface. The high bandgap of TiO₂ does not allow the process to run with visible light. To drive the process with visible light dye sensitsed TiO₂ porous layers are needed. Also the use of cocatalysts is under investigation.