Figure 4

Photocatalytic degradation of RhB over (c) BWO, BWO/1 G, BWO/1 M and (a) different mass ratio of BWO/MG composites under visible light irradiation (λ > 400 nm). (a,c) The photodegradation plots and (b,d) the apparent reaction rate constants k for the photodegradation of RhB. (c) the composite photocatalysts containing 1% graphene, MoS2 and MG, respectively).