One-step synthesis of CdS-TiO2-chemically reduced graphene oxide composites via microwave-assisted reaction for visible-light photocatalytic degradation of methyl orange

One-step synthesis of CdS-TiO2-chemically reduced graphene oxide (RGO) composites was carried out using microwave-assisted reduction of graphite oxide in CdS precursor solution with TiO2 suspension. The photocatalytic performance of CdS-TiO2-RGO composites in degradation of methyl orange was examined. Results show that the RGO addition could enhance the photocatalytic performance of CdS-TiO2 composites with maximum degradation efficiency of 99.5% under visible light irradiation as compared with the pure TiO2 (43%) and CdS-TiO2 (79.9%) composites due to the increase of specific surface area for more adsorbed MO and the reduction of electron-hole pair recombination with the introduction of RGO.