Elaboration and characterization of sulfated and unsulfated V2O5/TiO2 nanotubes catalysts for chlorobenzene total oxidation

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Abstract

This paper examines the use of TiO2 nanotubes (HNTs) as supports for V2O5 based catalysts in the total oxidation of chlorobenzene. The effect of the addition of SO42- onto the support is also discussed. Vanadium was introduced either by direct incorporation of V during the elaboration of the nanotubes (in situ elaboration), or by the impregnation of V on the surface of the supports (ex situ elaboration). The obtained catalysts have been characterized by means of ICP-AES, N2 adsorption-desorption at 77K, XRD, DRIFTS, XPS, H2-TPR and NH3-TPD. We demonstrated that sulfating step highly improves the catalytic performances of V-HNTs catalysts. This is due to an increased global acidity and a higher reactivity of redox sites thanks to the electronic interaction between sulfated titania and VOx species. Moreover, it seems that the 'in situ' or 'ex situ' elaboration route of sulfated V-catalysts influences the environment of vanadium species. In particular, the 'in situ' route leads to a more efficient catalyst. © 2013 Elsevier B.V.

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APA

Gannoun, C., Turki, A., Kochkar, H., Delaigle, R., Eloy, P., Ghorbel, A., & Gaigneaux, E. M. (2014). Elaboration and characterization of sulfated and unsulfated V2O5/TiO2 nanotubes catalysts for chlorobenzene total oxidation. Applied Catalysis B: Environmental, 147, 58–64. https://doi.org/10.1016/j.apcatb.2013.08.009

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