Graphene sheets grafted three-dimensional BiOBr0.2I0.8 microspheres with excellent photocatalytic activity under visible light

- Graphene sheets grafted 3D BiOBr0.2I0.8 microspheres were synthesized.
- Enhanced visible light absorption was observed in BiOBr0.2I0.8/graphene composites.
- Graphene acted as an electron-acceptor to hinder the charge recombination.
- The resulting composites exhibited high visible light photocatalytic activity.