화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.28, No.8, 1688-1692, August, 2011
DOI10.1007/s11814-011-0031-7  Export Citation
Effect of Fe3+ doping on the performance of TiO2 mechanocoated alumina bead photocatalysts
Cyril Jose Escopete Bajamundi, Maria Lourdes Pascual Dalida, Kitirote Wantala1, Pongtanawat Khemthong2, and Nurak Grisdanurak3, †
  • Department of Chemical Engineering, College of Engineering, University of the Philippines, Diliman 1101, Philippines
  • 1Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand
  • 2National Nanotechnology Center, NSTDA, Pathumthani 12120, Thailand
  • 3NCE for Environmental and Hazardous Waste Management, Faculty of Engineering, Thammasat University, Pathumthani 12120, Thailand
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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.
Keywords:TiO2;Fe3+ Dopant;Mechanical Coating Technique;Al2O3 Beads
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