Ionic Liquid Promotes High Dispersion of V2O5 on 3D Porous g-C3N4 Carrier to Enhance Catalytic Oxidative Desulfurization Performance

In this work, a series of supported catalysts V2O5/3D g-C3N4 were prepared by a solvothermal method and programmed calcination, where a vanadium-based ionic liquid (V-IL) [(C8H17)3NCH3]3H3V10O28 was used as the vanadium source and 3D porous carbon nitride (3D g-C3N4) acted as the carrier. The detailed structural and compositional characterization results show that the use of V-IL promotes the high dispersion of V2O5 on the carrier and effectively avoids the problem of agglomeration. Therefore, the catalytic oxidative desulfurization activity of V2O5/3D g-C3N4 is greatly enhanced, and the content of dibenzothiophene in model oil can be effectively reduced to 1.2 ppm under appropriate conditions. The recycling capacity and the possible process of the oxidative desulfurization were discussed.