| Summary: | ZnO/graphene and ZnO/stellerite composite photocatalysts were prepared through a facile hydrothermal-calcination processing with zinc acetate,urea,natural stellerite and graphene.The composition,morphology,specific surface area,pore size distribution and light absorption properties of prepared composites were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD),nitrogen adsorption/desorption and UV-visible diffused reflectance spectroscopy (UV-vis DRS).It was found that the prepared photocatalysts ZnO/stellerite and ZnO/graphene had wurtzite ZnO phase morphology with ZnO paticle sizes of 22.42 nm and 15.72 nm.<i>S</i><sub>BET</sub> of composites were 16.54 m<sup>2</sup>/g and 35.55 m<sup>2</sup>/g respectively.3D structure between ZnO and graphene resulted in the response to visible light region,reduced recombination of free charges,and enhanced interface charge transfer.The disinfection action towards <i>Staphylococcus</i> <i>aureus</i> (<i>S</i>.<i>aureus</i>) under solar light showed that the optimal amount of ZnO/graphene was 100 mg/L.ZnO/graphene exhibited significantly enhanced photocatalytic disinfection efficiency than ZnO/stellerite powders,and disinfection rate up to 1.17 h<sup>-1 </sup>is 1.31 times that of ZnO/stellerite composite.
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