Catalytic Conversion of 1,2-Dichlorobenzene Over Mesoporous V₂O₅/TiO₂ Prepared from Spray Pyrolysis

Abstract

Mesoporous V2O5/TiO2 particles were prepared by spray pyrolysis and applied to the catalytic oxidation of 1,2-dichlorobenzene (1,2-DCB). Two different precursors (alkoxide and nanoparticles) for the TiO2 support were used to determine the effects on the texture properties and the catalytic activity of the mesoporous V2O5/TiO2 particles. The 5 wt% V2O5/TiO2 particles had the largest surface area (173 m2/g) and 4.7 nm in average pore size. The catalytic activity of the V2O5/TiO2 particles depended strongly on the loading quantity of vanadium, whereas the P25-derived samples showed no significant change in catalytic activity with weight% of vanadium. The surface area of the V2O5/TiO2 particles prepared using the alkoxide precursor was larger than that of the particles prepared using P25 nanoparticles. The P25-derived V2O5/TiO2 particles, however, showed a higher catalytic activity compared with those alkoxide-derived, which is due to the difference in the vanadium quantity exposed to the pore surface. It was confirmed that the 10 wt% V2O5/TiO2 particles prepared by spray pyrolysis had an excellent activity for the oxidation of 1,2-DCB, particularly at temperatures below 300 degrees C.

Fabrication of TiVO4 photoelectrode for photoelectrochemical application

“…23,31 Numerous pioneering reports highlighted the superior performance of TiV systems as composites VO x /TiO 2 or as doping compared to TiVO 4bimetal oxide on their plausible photocatalysis application. 32,33 Samdarshi et al (2010) evaluated the effect of silver on the titanium vanadium mixed metal (Ag/ TiV) oxides. 34 They observed that the system could absorb a large portion of the visible spectrum, where favourable electron transfer could be experienced anatase-rutile mixed phase where silver dominated through its scavenging action to reduce hole recombination.…”