Fly ash cenospheres supported visible-light-driven BiVO4 photocatalyst: Synthesis, characterization and photocatalytic application

► A novel BiVO4/FACs composite was prepared as a photocatalyst for degradation MB. ► The catalyst is active under visible-light irradiation. ► The catalyst is floatable and can be recovered easily. ► The solid wastes FACs were reused effectively. ► Two main reactive radical groups were confirmed by the ESR spin-trapping with DMPO.