Abstract
CoS 2 , CoS 2 -C 60 /TiO 2 , CoS 2 -CNT/TiO 2 , and CoS 2 -Graphene/TiO 2 were prepared. The TiO 2 products had the anatase phase structure and interesting surface compositions. X-ray diffraction patterns of the CoS 2 -carbon/TiO 2 composites showed a single and clear anatase phase and the CoS 2 structure. Scanning electron microscopy characterization of the texture on the CoS 2 -carbon/TiO 2 composites showed a homogenous composition. Energy-dispersive X-ray spectra for elemental identification showed the presence of C and Ti with strong Co and S peaks from the CoS 2 -carbon/TiO 2 composites. The composites obtained were also characterized by transmission electron microscopy and UV-Vis spectroscopy. CoS 2 -carbon/TiO 2 composites showed excellent photocatalytic activity for the degradation of methylene blue under visible light irradiation. This was attributed to both photocatalysis on the TiO 2 support and charge transfer by the carbon nanomaterial, and the introduction of CoS 2 to enhance transfer of photogenerated electrons. Fullerene is an energy sensitizer that improves quantum efficiency and increases charge transfer to enhance dye adsorption during photocatalysis.
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