Improving Photocatalytic Performance from Bi(2)WO(6)@MoS(2)/graphene Hybrids via Gradual Charge Transferred Pathway

The charge transfer from the main catalyst to the cocatalyst is a key factor to enhance catalytic activity for photocatalytic nanocomposite materials. In order to enhance the charge transfer between Bi(2)WO(6) and graphene, we inlet MoS(2) as a “stepping-stone” into Bi(2)WO(6) and graphene. Here, we report an effective strategy to synthesize ternary Bi(2)WO(6)@MoS(2)/graphene nanocomposite photocatalyst by a facile two-step hydrothermal method, which is afforded by assembling two cocatalysts, graphene and MoS(2), into the Bi(2)WO(6) matrix with a nanoparticle morphology as a visible light harvester. Compared with Bi(2)WO(6)/graphene, Bi(2)WO(6)/MoS(2) and pure Bi(2)WO(6), the Bi(2)WO(6)@MoS(2)/graphene ternary composites exhibit superior photocatalytic activity owing to an enhanced charge carrier separation via gradual charge transferred pathway. This work indicates a promising cocatalyst strategy for designing a more efficient graphene based semiconductor photocatalyst toward degradation of organic pollutants.