Issue
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.
[References]
  1. Long Y, Lu Y, Huang Y, Peng Y, Lu Y, Kang SZ, Mu J, J.Phys. Chem. C., 113, 13899, 2009
  2. Nam WS, Han GY, Korean J. Chem. Eng., 20(1), 180, 2003
  3. Artkla S, Wantala K, Srinameb BO, Grisdanurak N, Klysubun W, Wittayakun J, Korean J. Chem. Eng., 26(6), 1556, 2009
  4. Zhou M, Yu J, Cheng B, J. Hazard. Mater., 137, 1938, 2006
  5. Yin S, Komatsu M, Zhang QW, Saito F, Sato T, J. Mater. Sci., 42(7), 2399, 2007
  6. Choi WY, Termin A, Hoffmann MR, J. Phys. Chem., 98(51), 13669, 1994
  7. Shi HW, Zheng JT, Hu Y, Zhao YC, Mater. Chem. Phys., 106(2-3), 247, 2007
  8. Yoshida H, Lu Y, Nakayama H, Hirohashi M, J. Alloy.Compd., 475, 383, 2009
  9. Litter MI, Navio JA, J. Photochem. Photobio. A., 98, 171, 1996
  10. Feret FR, Roy D, Boulanger C, Spectro. Acta. B., 55, 1051, 2000
  11. Li ZJ, Shen WZ, He WS, Zu XT, J. Hazard. Mater., 155(3), 590, 2008
  12. Zhou MH, Yu JG, Cheng B, J. Hazard. Mater., 137(3), 1838, 2006
  13. Bouras P, Stathatos E, Lianos P, Appl. Catal. B: Environ., 73(1-2), 51, 2007
  14. Liu B, Wen L, Zhao X, Mater. Chem. Phys., 106(2-3), 350, 2007
  15. Thompson TL, Yates JT, Top. Catal., 35, 197, 2005
  16. Hsu TF, Hsiung TL, Wang J, Huang CH, Wang HP, Nucl.Instrum. Methods Phys. Res. A., 619, 98, 2010