Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (4): 607-615.DOI: 10.1016/S1872-2067(15)61035-X

• Articles • Previous Articles     Next Articles

Photocatalytic degradation of 2,4-dichlorophenol with V2O5-TiO2 catalysts: Effect of catalyst support and surfactant additives

Eda Sinirtas, Meltem Isleyen, Gulin Selda Pozan Soylu   

  1. Chemical Engineering Department, Faculty of Engineering, Istanbul University, Avcilar 34320, Istanbul, Turkey
  • Received:2015-10-06 Revised:2015-12-22 Online:2016-03-30 Published:2016-03-30
  • Contact: Gulin Selda Pozan Soylu
  • Supported by:

    This work was supported by The Scientific and Technological Research Council of Turkey(TUBITAK)within the research project 111M210 [2011-2013].

Abstract:

Binary oxide catalysts with various weight percentage V2O5 loadings were prepared by solid-state dispersion and the nanocomposites were modified with surfactants. The catalysts were analyzed using X-ray diffraction, diffuse-reflectance spectroscopy, Fourier-transform infrared spectroscopy, scanning electron microscopy, and N2 adsorption-desorption. The photocatalytic activities of the catalysts were evaluated in the degradation of 2,4-dichlorophenol under ultraviolet irradiation. The photocatalytic activity of 50 wt% V2O5-TiO2 (50V2O5-TiO2) was higher than those of pure V2O5, TiO2, and P25. Interactions between V2O5 and TiO2 affected the photocatalytic efficiencies of the binary oxide catalysts. Cetyltrimethylammonium bromide (CTAB) and hexadecyltrimethylammonium bromide (HTAB) significantly enhanced the efficiency of the 50V2O5-TiO2 catalyst. The highest percentage of 2,4-dichlorophenol degradation (100%) and highest reaction rate (2.22 mg/(L·min)) were obtained in 30 min with the (50V2O5-TiO2)-CTAB catalyst. It is concluded that the addition of a surfactant to the binary oxide significantly enhanced the photocatalytic activity by modifying the optical and electronic properties of V2O5 and TiO2.

Key words: 2,4-Dichlorophenol, Degradation, Photocatalysis, Surfactant, Binary oxide, Characterization