C. Girardeaux, et al.
J. Phys. IV France 132 (2006) 185-188
Photocatalysis over titania on iron oxideKwi Cheol Kim1 and Chong Soo Han1, 0
1 Department of Chemistry and NTRC, Chonnam National University, Gwang ju, Korea
Photocatalytic activity of TiO2 deposited on spherical sub micron-sized Fe2O3 particle was investigated under ultraviolet or visible light. The Fe2O3 particles were prepared using a spray pyrolysis of aqueous Fe(NO3)3 solution in air flow. TiO2 was deposited on Fe2O3 particle by irradiation of ultraviolet or visible light to the suspension of Fe2O3 particle and a TiO2 precursor. When TiO2 was formed under visible light (TiO2/Fe2O3-VIS), there were reasonable trends in the phase shift of PAS signal and EDX signal of Ti. However, there was no trend for the case of ultra violet irradiation (TiO2/Fe2O3-UV). TiO2/Fe2O3-VIS showed higher rates of decomposition of organic compound, of decrease in contact angle of water drop, and of decrease in the number of E. coli under visible light than TiO2/Fe2O3-UV or TiO2 film. From the results, it was suggested that TiO2/Fe2O3-VIS had a regular thin layer of TiO2 compared to TiO2/Fe2O3-UV and the photo-generated carrier(s) in iron oxide migrated to the surface of TiO2 in the case of TiO2/Fe2O3-VIS.
© EDP Sciences 2006