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

Abstract

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.