Research on Chemical Intermediates

, Volume 42, Issue 2, pp 1029–1043 | Cite as

Synthesis, characterization, and catalytic activity of FeTiO3/TiO2 for photodegradation of organic pollutants with visible light

  • María E. Zarazúa-Morín
  • Leticia M. Torres-Martínez
  • Edgar Moctezuma
  • Isaías Juárez-Ramírez
  • Brenda B. Zermeño
Article

Abstract

High-purity ilmenite, FeTiO3, was prepared by the sol–gel method and calcination under nitrogen atmosphere. Several FeTiO3/TiO2 catalysts were prepared by the impregnation method using ilmenite and titania, both synthesized by the sol–gel method with ethanol and acetic acid. FeTiO3/TiO2 photocatalysts exhibited significant absorption in the ultraviolet (UV) region with an energy bandgap between 2.9 and 3.1 eV. These materials are more active than titania (Degussa P25) for degradation of Orange G and 4-chlorophenol under illumination from a visible-light lamp. This effect may be attributed to the formation of a heterojunction at the point of contact between FeTiO3 and TiO2 particles. However, 4-chlorophenol is mineralized via formation of hydroquinone and benzoquinone, indicating that when illuminated with a solar emulator lamp, the materials did not generate enough HO· radicals to promote formation of benzenetriol and catechol.

Keywords

Ilmenite Environmental TiO2 Mixed oxides Photodegradation 

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • María E. Zarazúa-Morín
    • 1
  • Leticia M. Torres-Martínez
    • 1
  • Edgar Moctezuma
    • 2
  • Isaías Juárez-Ramírez
    • 1
  • Brenda B. Zermeño
    • 2
  1. 1.Departamento de Ecomateriales y Energía, Facultad de Ingeniería CivilUniversidad Autónoma de Nuevo LeónSan Nicolás de los GarzaMexico
  2. 2.Facultad de Ciencias QuímicasUniversidad Autónoma de San Luis PotosíSan Luis PotosíMexico

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