Regensburg 2013 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 11: Poster Session I: Application of thin films; Ion beam induced surface patterns; Ion and electron beam induced processes; Micro- and nanopatterning (jointly with O)

DS 11.3: Poster

Montag, 11. März 2013, 17:00–20:00, Poster B1

Nanostructured TiO₂ thin films and structural composites for photocatalysis — •Bodo Henkel, Sebastian Zabel, Thomas Strunskus, and Franz Faupel — Institute for Materials Science, Kiel, Germany

Pulsed DC Magnetron Sputtering and various temperature treatments were used to produce improved photocatalytically active TiO₂ layers on quartz glass. Two approaches were used to improve decomposition of the test substance methylene blue. First, a structured liquid-diffusion open surface for larger interaction area was produced. At second, a synergetic multilayer combining the advantages of different TiO₂ structures was manufactured. This combination of different layers provides new insight on how the functional unit should be optimized to take into account the different physical processes important for photocatalysis. For measuring photocatalytic efficiency, decomposition of methylene blue in combination with in situ UV-vis measurement was used. An UV LED with 369 nm wavelength was taken to irradiate the TiO₂ layer. To analyze the correlation of dye decomposition rate to surface and crystal structure SEM, XRD, UV-vis and Raman spectroscopy measurements have been done.