Textural properties of V 2 O 5 /TiO 2 catalysts obtained from VOCl 3

Abstract

V₂O₅/TiO₂ systems have been obtained by reacting TiO₂ (P-25 from Degussa, ca 55% anatase, or a rutilised modification, ca 3% anatase) with gaseous VOCl₃. The samples have been characterised by X-ray diffraction, UV–Vis spectrophotometry and nitrogen adsorption at 77 K. For the anatase carrier, a monolayer coverage of V₂O₅ is achieved, but only 0·46 monolayers are formed with the rutilised support. The specific surface areas decrease upon incorporation of V₂O₅, and that seems to be well dispersed without forming crystallites.