Preparation of H₂WO₄/GO and its ultrasonic-oxidative desulfurization in model oil

H₂WO₄/GO was prepared by dipping method using tungstic acid and graphene oxide as raw materials. The morphology and structure of H₂WO₄/GO were characterized by XRD, FT-IR, SEM and BET. The ultrasonic-oxidation desulfurization of model oil containing DBT was carried out with H₂WO₄/GO as catalyst, H₂O₂ as oxidant agent and acetonitrile as extractant. Under the optimum conditions with 5 mL of model oil, 30% of tungstic acid loading(mass ratio), 0.02 g of catalyst, 1 mL of acetonitrile, H₂O₂/S mol ratio of 8, ultrasonic power of 150 W and at 50℃, the removal rate of DBT, 4, 6-DMDBT and BT can reach 96.6%, 81.2%, 72.8%, respectively. Besides, the recycling use of catalyst and the mechanism of ultrasonic-oxidation desulfurization were investigated.