Polyoxometalate@g-C3N4 nanocomposite for enhancing visible light photoelectrocatalytic performance

The prepared g-C3N4 under morphology controlling shows better physic and chemical performance. The synergistic effect of POM and g-C3N4 in the hybrid improves its high photocatalytic capability. The research indicates that g–C3N4–based material is a potential photoelectrode for PEC degradation. Besides, the PMoV nanocomposite shows better activities in the PEC and removal efficiency of RhB. Compared with the same PEC system, the degradation time of RhB is shorter and the degradation efficiency is higher for the MCN/PMoV catalysts. •PEC degraded RhB overcoming recovering catalyst and separating reaction products.•MCN provides PMoV more active sites for improving catalytic efficiency.•Compared with PEC, MCN/PMoV catalysts advantageous in degradation time and efficiency.•10% PMoV shows better activities in the PEC and removal efficiency of RhB.