The V₂O₅/g⁃C₃N₄ catalyst was prepared by calcination method, using melamine, ammonium metavanadate, boric acid as precursors and methanol as solvent. The structure and morphology of the catalyst were characterized by X⁃Ray Diffraction (XRD), Fourier transform infrared spectroscopy (FT⁃IR), X⁃ray photoelectron spectroscopy (XPS), scanning tunneling microscope(SEM) and brunauer⁃emmett⁃teller(BET). The desulfurization ability of dibenzothiophene (DBT) in model oil was investigated using V₂O₅/g⁃C₃N₄ as catalyst, acetonitrile as extractant and H₂O₂ as oxidant. The effects of reaction temperature, amount of catalyst and extractant, n(H₂O₂)/n(S) molar ratio, and different sulfides on desulfurization rate were investigated. Under the optimum conditions: 5.0 mL model oil, 3.0 mL acetonitrile, n(H₂O₂)/n(DBT)=8, 0.02 g of catalyst, temperature was 30 ℃ and reaction time was 60 min, the desulfurization rate of DBT can reach 91.9%, which can also keep at a higher value at 85.7% after 5 times of catalyst regeneration.

Using FeCl3·6H2O  and NaOH as reactants, polyethylene glycol 200 as template agent, rodlikeFe2O3 nano-crystalline was synthesized. The samples were characterized by TEM, XRD and FI-IR.The results of TEM show that morphology of samples were changed with conditions of preparation.The synthetic conditions of nano-rods were optimized. The Fe2O3  nanorods were modified by sodium lauryl sulfate and its effect of oxidative desulfurization of thiophene was studied. Experiments show that modified Fe2O3  nanorods could significantly promote the removal of thiophene in the simulated oil due to effect of coupling existed between modified Fe2O3  catalyst and ultrasonic. The desulphurization rate could reach 100%.

Cpper phosphotungstate was synthesize by phosphotungstic acid and nitric acid copper as raw materials. Oxidative desulfurization reaction of model oil was studied by copper phosphotungstate as catalyst and H ₂O ₂ as oxidant. The experiment indicate various oxidative desulfurization system, reaction temperature, catalytic amount, amount of hydrogen peroxide and reaction time influenced on oxidative desulfurization effect. The results show that a combined copper phosphotungstate, CTAB and H ₂O ₂ could lead to a good conversion of DBT. Reaction temperature was 40 ℃,catalytic amount was 0.01 g, volume of hydrogen peroxide was 0.5 mL, reaction time was 1 h, which made conversion rate of dibenzothiophene up to 93%. The catalyst may was recycled five times and desulfurization effecience of mode oil isn't decreased. 