Fe2o3 tio2 thin films prepared by sol-gel method

Ramona-Crina Suciu1, Marcela Corina Rosu1, Teofil Danut Silipas1, Emil Indrea1, Violeta Popescu2, George Liviu Popescu2

1 National Institute for R&D of Isotopic and Molecular Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania
2 Technical University of Cluj-Napoca, 15 C. Daicoviciu, 400020 Cluj-Napoca, Romania

Abstract


Fe2O3-doped TiO2 photocatalysts were prepared by sol-gel method. Mixed films of TiO2 and Fe2O3 were deposited on indium tin oxide (ITO) coated glass slides by spray pyrolysis using solutions that contains both tetraisopropoxides of titanium as Ti2+ source and FeCl3 in butanol as Fe3+ source. The film consists on five to ten Fe2O3 TiO2 layers. UV-VIS spectra were obtained both for the solutions of precursors and films before and after heat treatment. Fluorescence measurements were made for the solutions. X ray diffraction was use for structural investigations. The morphology of the film was studied by Scanning Electron Microscopy. Enhancement in the UV optical absorption domain of Fe2O3-doped TiO2 indicates that it can be used as an efficient photocatalyst under visible light irradiation.

Keywords


photocatalytic activity; sol gel; spray pyrolysis; TiO2

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