The photocatalytic process is described as the rate change of chemical processes in the presence of a photocatalyst when exposed to light. When a photocatalyst absorbs light quanta, electron–hole pairs are formed, causing chemical modification in reacting materials that make contact with them [20]....
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Therefore pristine V2O5 gives a better performance at lower potential than the Ag, Cd, and Ru doped V2O5 NPs.(7)2V(IV)→2V(V)+2e-(8)2VV+D-glucose→2V(IV)+D-gluconolactone(9)D-gluconolactone+H2O→D-gluconicacid+H2O2(10)H2O2→O2+2H++2e- Download: Download high-res image (212KB...
The use of acetic acid gives more than 26% conversion in presence of TBHP as oxidant and an ~40% conversion with hydrogen peroxide as oxidant in presence of an initiator, with 92% selectivity for cyclohexanol product.doi:10.1007/s12034-012-0331-5YASMINA NESRINE TCHENAR...
Both catalysts when incorporated with SnO2 film show high selectivity towards SO2 gas at lower operating temperature. MgO gives a sensitivity of 317% at an operating temperature of 280掳C towards 500?ppm of SO2 gas whereas V2O5 catalyst gives a sensitivity of 166% at 280掳C for the same ...
To prepare the Al3 + -doped V2O5/RGO nanocomposite, commercial V2O5 powders (! 99.0 %, Sigma–Aldrich) and oxalic acid were dissolved in distilled water with constant stirring to form a pellucid blue solution. Al(NO3)3·9 H2O (AR, Beijing Chemical Works, 0.02 g) and graphene oxides (44...
The incomplete dispersion of tungsten oxide gives rise to the formation of crystalline WO3 on titania surface, and the mounts of surface Brnsted acid sites decrease consequently. From the TPR and Raman spectra, it is indicated that two-dimensional vanadium species exhibits a tendency to moderately ...
V2O5/SnO2 solid acid catalysts have been employed for the vapour-phase Beckmann rearrangement of cyclohexanone oxime to e-caprolactam.Catalysts with different vanadia loading(3-15 wt%)were prepared by impregnation method and characterized by XRD,BET surface area,FTIR and ~(51)V NMR techniques.The...
Consequently, V–OH Brønsted acid sites and V5+ = O sites are inhibited, which are both of crucial importance in the SCR process. The deactivation model also gives an explanation to the very low concentrations of potassium needed to deactivate the SCR catalyst, since one metal atom ...
Proper amounts of the acid ((O ((VO)=15%) components loaded in the acid-modified VO/TiO catalyst are able to build a bi-functional circumstance that is favorable for the formation of DMM with high activity and selectivity. As a result, for the selective oxidation of methanol, the HSO-...