Articles
  • Enhancement of NOx photo-oxidation by Fe-doped TiO2 nanoparticles
  • Adriana Martinez-Oviedoa, Schindra Kumar Raya, Gobinda Gyawalib, Vicente Rodriguez-Gonzalezc and Soo Wohn Leea,*
  • aDepartment of Environmental and Bio-Chemical Engineering, Sun Moon University, Asan, Chungnam, 31460, Korea bDivision of Basic Engineering, Sun Moon University, Asan, Korea cDivisión de Materiales Avanzados, Instituto Potosino de Investigación Científica y Tecnológica, Camino a la Presa San José 2055 Col. Lomas 4a. sección, C.P. 78216 San Luis Potosí, S.L.P., México.
Abstract
Microwave hydrothermal-assisted sol-gel method was employed to synthesize the Fe doped TiO2 photocatalyst. The morphological analysis suggests anatase phase nanoparticles of ~20 nm with an SBET area of 283.99 m2/g. The doping of Fe ions in TiO2 created oxygen vacancies and Ti3+ species as revealed through the XPS analysis. The reduction of the band gap (3.1 to 2.8 eV) is occurred by doping effect. The as-prepared photocatalyst was applied for removal of NOx under solar light irradiation. The doping of Fe in TiO2 facilitates 75 % of NOx oxidation efficiency which is more than two-fold enhancement than the TiO2 photocatalyst. The possible reason of enhancement is associated with high surface area, oxygen vacancy, and reduction of the band gap. Also, the low production of toxic intermediates, NO2 gas, is further confirmed by Combustion Ion Chromatography. The mechanism related NOx oxidation by the doped photocatalyst is explained in this study.

Keywords: Fe doped TiO2, Microwave hydrothermal, Sol-gel; DeNOx, NO2 inhibition.

This Article

  • 2019; 20(3): 222-230

    Published on Jun 30, 2019

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