Preparation of WO3/g-C3N4 composites and their application in oxidative desulfurization

The WO3/g-C3N4 composite was successfully synthesized through directly calcining phosphotungstic and melamine. The WO3 is one of several good catalyst for oxidation desulfurization. But, the surface area of WO3 is small and short of active site. Taking into account the catalyst with large surface area generally has a high catalytic activity. The surface area of WO3/g-C3N4 composite is ten times as big as the WO3. The crystalline of WO3/g-C3N4 composites was obviously improved. Desulfurization experiment showed that the desulfurization rate of simulated oil can reach 91.2% under optimal conditions. Meanwhile, the activity of the catalyst was not significantly decreased after the 5 recycles. The result show that stability of catalyst is high.