以1-丁基-3-甲基咪唑磷钨酸盐离子液体为钨源，正硅酸四乙酯为硅源，通过溶胶-凝胶法合成了WO₃-SiO₂，并用Raman、XRD、TEM对其结构组成进行了表征。在WO₃-SiO₂作催化剂、乙腈作萃取剂、H₂O₂作氧化剂的催化氧化脱硫系统内，考察了催化剂对模拟油中二苯并噻吩（DBT）的脱除效果。结果表明，W组分被负载进入无定形SiO₂载体上，并以单斜相WO₃的形式存在。在n（W）：n（Si）=0.1、n（O）：n（S）=3、m（WO₃-SiO₂）=0.03 g、T=50℃的最佳实验条件下，WO₃-SiO₂对模拟油中DBT的脱除率可达94.73%。

WO₃-SiO₂ nanoparticles are synthesized via a sol-gel method using 1-butyl-3-methylimidazolium phosphotungstate ionic liquid and ethyl orthosilicate as sources of tungsten and silicon respectively.Subsequently,the composition and structure of prepared WO₃-SiO₂ catalysts are characterized by Raman,XRD and TEM.The removal efficiency of dibenzothiophene (DBT) from model oil by as-prepared catalyst is explored in the catalytic oxidative desulfurization system with WO₃-SiO₂ as catalysts,acetonitrile as extraction agent and H₂O₂ as oxidant.The results show that W species have been imbedded in amorphous SiO₂ supporters in the form of monoclinic WO₃.The removal rate of DBT by WO₃-SiO₂ can reach 94.73% under the optimal experimental conditions of n(W):n(Si)=0.1,n(O):n(S)=3,m(WO₃-SiO₂)=0.03 g and T=50℃.

徐竞帆(1995-),男,硕士研究生,研究方向为催化氧化脱硫,353594270@qq.com