Co-deposition of photocatalytic Fe doped TiO2 coatings by MOCVD

To enhance the absorption in the visible region for supported TiO2, Fe doped TiO2 coatings have been prepared in one step by a codeposition process of metal organic chemical vapor deposition method. The results of XANES indicate that iron exists as isolated octahedrally coordinated Fe3+ ions substituting Ti4+ in the TiO2 lattice. EDX reveals that iron has a uniform distribution within Fe-TiO2 coatings. U-V-Vis diffuse reflectance spectra show a slight shift to longer wavelengths and an enhancement of the absorption in the visible region (> 400 nm) for the Fe doped TiO2 coatings, compared to the non-doped sample. The Fe doped TiO2 samples exhibited good photocatalytic activities for the degradation of methyl orange under visible light irradiation. (c) 2006 Elsevier B.V. All rights reserved.