Vanadium-MFI zeolites with enhanced vanadium insertion were synthesized through an ammonium carbonate-assisted hydrothermal synthesis and applied as heterogeneous catalyst for the oxidation of organosulfur compounds DBT and 4,6-DMDBT. The prepared vanadium-MFI zeolites were characterized by Scanning electron microscope, Transmission electron microscope, X-ray diffraction, Fourier-transform infrared spectroscopy, UV-vis diffuse reflectance spectroscopy and Raman spectroscopy. The obtained UV-vis spectra disclosed that addition of ammonium carbonate could effectively strengthen the insertion of vanadium element, and on the same time enhance the tetrahedral framework vanadium percentage in vanadium species. The synthesized N-VS(4) zeolite could realize almost complete oxidation of DBT in 240 min, which is obviously better than N-VS(3) and N-VS(5) zeolite. Moreover, the calcined recycled N-VS(4) zeolite shows good re-usability for more than four cycles, which indicates it is an active and stable heterogeneous catalyst.

通过碳酸铵辅助水热合成法合成了钒插入量增加的钒-MFI沸石，并将其用作非均相催化剂，用于氧化有机硫化合物DBT和4,6-DMDBT。通过扫描电子显微镜，透射电子显微镜，X射线衍射，傅立叶变换红外光谱，紫外可见漫反射光谱和拉曼光谱对制备的钒-MFI沸石进行了表征。所获得的紫外可见光谱表明，碳酸铵的加入可以有效地增强钒元素的插入，同时提高钒中四面体骨架钒的含量。合成的N-VS（4）沸石可在240分钟内实现DBT的几乎完全氧化，显然比N-VS（3）和N-VS（5）沸石更好。此外，煅烧的回收N-VS（4）沸石在四个以上的循环中均显示出良好的可重复使用性，这表明它是一种活性且稳定的多相催化剂。