Berlin 2015 – scientific programme

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DS: Fachverband Dünne Schichten

DS 36: Poster Session I

DS 36.102: Poster

Thursday, March 19, 2015, 09:30–12:00, Poster A

Photocatalytic titania layers with designed morphologies — •Alexander Vahl, Bodo Henkel, Oleksandr Polonskyi, Thomas Strunskus, and Franz Faupel — Lehrstuhl für Materialverbunde, Institut für Materialwissenschaften, Technische Fakultät der Christian-Albrechts-Universität zu Kiel

Titania thin films are widely studied due to their high potential for applications as photocatalytic material. For the improvement of photocatalytic performance of titania thin film layers composites of titania layers comprising different morphologies were prepared. The investigated composites rely on a closed titania bottom layer, which has been prepared by pulsed DC reactive sputtering. Increase in photocatalytic relevant surface area of sputtered titania thin films has been effectively realized by addition of an open porous titania cluster top layer. Samples were characterized by SEM, Raman spectroscopy and methylene blue degradation measurements. Raman spectra show pure phase anatase for both layers, cross sectional SEM micrographs indicate a strong increase in surface area by cluster coating. Congruently, methylene blue degradation experiments reveal a noticeable improvement in photocatalytic performance by application of an additional titania cluster layer.