ultrasound - assisted oxidative removal of dibenzothiophene with using functionalize silica nanosphere with amino hybrid of wo3 as catalyst

Silica nanospheres has been synthesized by stober method. the sio2 structures were functionalized amino hybrid of tungstic oxide. the prepared nanostructures were characterized by fourier transform infrared (ft-ir), scanning electron microscopy (sem), energy-dispersive x-ray spectroscopy (eds) and x-ray diffraction (xrd) spectroscopy. this new nanostructure was applied to oxidative desulfurization of dibenzothiophene from model fule. the result indicated that n-wo2-nh2-sio2 has acceptable catalytic activity (about 61%, 160 min). also the effects of contact time, initial dbt concentration and temperature on the removal of the prepared catalyst were investigated. in addition the recycling of n-wo2-nh2- sio2 sample show no remarkable decrease in activity catalyst after 3 runs.