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Research on Chemical Intermediates

, Volume 41, Issue 7, pp 4151–4167 | Cite as

Photocatalytic degradation of dibenzothiophene using La/PEG-modified TiO2 under visible light irradiation

  • Sina Moradi
  • Manouchehr Vossoughi
  • Mehrzad Feilizadeh
  • S. Mohammad Esmaeil Zakeri
  • Mohammad Moein Mohammadi
  • Davood Rashtchian
  • Amin Yoosefi Booshehri
Article

Abstract

While the photocatalytic degradation of various organic compounds under UV light irradiation has been widely investigated, visible-light-induced photocatalytic degradation of low levels of pollutants such as dibenzothiophene (DBT) is occasionally reported. In the present work, lanthanide/polyethylene glycol-modified TiO2 (La/PEG/TiO2) has been successfully synthesized by a sol–gel method. The photocatalyst was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–Vis diffusive reflectance spectroscopy, and energy dispersive X-ray analysis. Moreover, the photocatalytic degradation of DBT under visible light irradiation is investigated for the first time using the newly synthesized photocatalyst. The effects of important operational parameters such as initial DBT concentration, catalyst loading, pH, and amount of H2O2 on the degradation efficiency were studied. Kinetics parameters of the photocatalytic oxidation of DBT were also calculated. The results show that DBT decomposition occurs according to the Langmuir–Hinshelwood mechanism. The degradation products were analyzed by the GC–MS technique.

Keywords

Photocatalytic degradation Dibenzothiophene La/PEG/TiO2 Visible light illumination Langmuir–Hinshelwood 

Notes

Acknowledgment

The authors acknowledge the Biochemical and Bioenvironmental Engineering Research Center (BBRC) at Sharif University of Technology for financial support.

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Sina Moradi
    • 1
  • Manouchehr Vossoughi
    • 1
    • 2
  • Mehrzad Feilizadeh
    • 1
  • S. Mohammad Esmaeil Zakeri
    • 3
  • Mohammad Moein Mohammadi
    • 1
  • Davood Rashtchian
    • 1
  • Amin Yoosefi Booshehri
    • 4
    • 5
  1. 1.Department of Chemical and Petroleum EngineeringSharif University of TechnologyTehranIran
  2. 2.Institute for Nano-science and Nano-technologySharif University of TechnologyTehranIran
  3. 3.Department of EngineeringUniversity of KashanKashanIran
  4. 4.School of Chemical & Biomedical EngineeringNanyang Technological UniversitySingaporeSingapore
  5. 5.Singapore Membrane Technology CentreNanyang Environmental and Water Research InstituteSingaporeSingapore

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