H2WO4/GO的制备及其超声-氧化脱除模拟油中的硫化物

以钨酸和氧化石墨烯为原料，利用浸渍法将钨酸负载到氧化石墨烯上制得H₂WO₄/GO。采用XRD、FT-IR、SEM、BET表征确定H₂WO₄/GO的形态及其结构。以H₂WO₄/GO作为催化剂，H₂O₂作为氧化剂，乙腈作为萃取剂超声氧化脱除模拟油中的二苯并噻吩（DBT）。实验表明，在模拟油为5 mL，钨酸的负载量为30%（质量分数），催化剂为0.02 g，乙腈为1 mL，H₂O₂/S（mol ratio）为8，反应温度为50℃，超声功率为150 W的最佳反应条件下，二苯并噻吩（DBT）、4，6-二甲基二苯并噻吩（4，6-DMDBT）、苯并噻吩（BT）的脱除率分别达到96.6%、81.2%、72.8%。同时，考察了催化剂的循环使用性能，并对超声氧化脱硫机理进行了研究。

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.