Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.28, No.8, 1688-1692, 2011 Effect of Fe3+ doping on the performance of TiO2 mechanocoated alumina bead photocatalysts
Ferric ion was introduced to the commercial photocatalyst P25 (Degussa) by ultrasonic wet impregnation technique. The concentration of the dopant was varied from 0.0 to 3.0% Fe/Ti ratio. The doped TiO2 was then loaded to alumina balls using mechanical coating technique and followed by calcination in air at 400, 450, 500 and 550 ℃ . The fabricated photocatalyst was characterized by X-ray diffraction, N2 adsorption-desorption isotherms, scanning electron
microscopy, UV-Vis diffuse reflectance spectroscopy, X-ray adsorption near edge structure and photoluminescence spectroscopy. The photocatalytic activity was tested by following the degradation of methylene blue (MB). It was found that the Fe3+ doped TiO2/Al2O3 has a combination of anatase and rutile phase and free of iron oxide phases. The optimum calcination temperature is 400 oC with 0.1% Fe3+ concentration. The catalyst addresses the entrainment
in photocatalytic reactors, eliminating the need for a post filtration process.
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