Enhanced photocatalytic activity of AgBr photocatalyst via constructing heterogeneous junctions with reduced graphene

A series of reduced graphene (rGO) and AgBr composite heterojunction photocatalysts were fabricated through a facile solvothermal method. The rGO/AgBr heterostructures characterized by XPS, XRD, UV–Vis DRS, SEM, TEM, photoluminescence (PL), the transient photocurrent responses. TEM analyses indicated that silver bromide successfully compounded without other impurities. DRS exhibited composites have better optical properties than pure bromide. PL responses demonstrated addition significantly promotes separation photogenerated electrons holes. Subsequently, photocatalytic activities studied degrading Rhodamine B (RhB). It turned out degradation rate RhB was higher AgBr. Furthermore, to study mechanism heterostructures, trapping experiments used identify main active components. This work confirmed performance catalyst greatly improved after doping graphene, which provided certain data support for organic contaminants in water.