화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.53, 183-191, September, 2017
DOI10.1016/j.jiec.2017.04.024  Export Citation
Effect of dopants on the structure of titanium oxide used as a photocatalyst for the removal of emergent contaminants
A. Gil1, 2, A.M. García3, M. Fernández3, M.A. Vicente4, B. González-Rodríguez4, V. Rives4, and S.A. Korili1, 2
  • 1Departamento de Química Aplicada, Edificio de los Acebos, Universidad Pública de Navarra, Campus de Arrosadía E-31006 Pamplona, Spain
  • 2Instituto de Materiales Avanzados—INAMAT, Universidad Pública de Navarra, Campus de Arrosadía E-31006 Pamplona, Spain
  • 3Instituto de Materiales Avanzados—INAMAT, Universidad Pública de Navarra, Campus de Arrosadía E-31006 Pamplona, Spain, Korea
  • 4GIR-QUESCAT, Departamento de Química Inorgánica, Universidad de Salamanca, E-37008 Salamanca, Spain
Photocatalysts composed of titanium dioxide modified with B, F, N and P have been synthesized, characterized and applied to the degradation of caffeine, diclofenac, ibuprofen and salicylic acid. The modified TiO2 samples were prepared by the sol.gel technique starting from titanium(IV) isopropoxide and using H3BO3, NH4F, N(C2H5OH)3 and H3PO4 as precursors of the modifiers, with the content varying between 0 and 5 wt%. Structural characterization was based on nitrogen physisorption at -196 °C, powder X-ray diffraction (PXRD), simultaneous thermogravimetric/differential thermal analysis (TG/ DTA) and X-ray photoelectron spectroscopy (XPS). The structural properties of the modified TiO2 solids were significantly different depending on the nature and amount of modifiers and the calcination temperature. TiO2 in the anatase phase was obtained in all cases and was stable upon calcination at 400 °C. The photocatalytic degradation of caffeine, diclofenac, ibuprofen and salicylic acid by modified TiO2 was investigated under ultraviolet irradiation at 25 °C. The photocatalytic degradation behavior followed the order: caffeine > diclofenac = ibuprofen > salicylic acid. B-doped TiO2 was the most efficient catalyst in the degradation of these selected emerging contaminants.
Keywords:Doped titanium oxide;Sol.gel method;Emerging contaminants removal;Photocatalysis
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