Preparation of vanadium-substituted polyoxometalate doped carbon nitride hybrid materials POM/g-C3N4 and their photocatalytic oxidation performance

A series of vanadium-substituted Keggin-type polyoxometalate ((NH4)4 [PMo11VO40]) doped carbon nitride (POM/g-C3N4) hybrid materials were prepared by using green dipping method and characterized by FTIR, XRD, and DRS. Their photocatalytic oxidation performance was investigated by degradation of different dye pollutants under visible light irradiation. In different composition, POM/g-C3N4 (1:3) exhibited the best photocatalytic activity compared with POM, g-C3N4, POM/g-C3N4 (1:1) and POM/g-C3N4 (1:5). The synergistic effect of POM and g-C3N4 in the hybrid facilitated its high photocatalytic capability.