Photodegradation of Organic Dye by CoS2 and Carbon(C60, Graphene, CNT)/TiO2 Composite Sensitizer

doi:10.1016/S1872-2067(11)60429-4

摘要/Abstract

摘要： CoS₂, CoS₂-C₆₀/TiO₂, CoS₂-CNT/TiO₂, and CoS₂-Graphene/TiO₂ were prepared. The TiO₂ products had the anatase phase structure and interesting surface compositions. X-ray diffraction patterns of the CoS₂-carbon/TiO₂ composites showed a single and clear anatase phase and the CoS₂ structure. Scanning electron microscopy characterization of the texture on the CoS₂-carbon/TiO₂ 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 CoS₂-carbon/TiO₂ composites. The composites obtained were also characterized by transmission electron microscopy and UV-Vis spectroscopy. CoS₂-carbon/TiO₂ composites showed excellent photocatalytic activity for the degradation of methylene blue under visible light irradiation. This was attributed to both photocatalysis on the TiO₂ support and charge transfer by the carbon nanomaterial, and the introduction of CoS₂ to enhance transfer of photogenerated electrons.

关键词: fullerene, carbon nanotube, graphene, cobalt disulfide, titanium dioxide, visible light, methylene blue, photodegradation

Abstract: CoS₂, CoS₂-C₆₀/TiO₂, CoS₂-CNT/TiO₂, and CoS₂-Graphene/TiO₂ were prepared. The TiO₂ products had the anatase phase structure and interesting surface compositions. X-ray diffraction patterns of the CoS₂-carbon/TiO₂ composites showed a single and clear anatase phase and the CoS₂ structure. Scanning electron microscopy characterization of the texture on the CoS₂-carbon/TiO₂ 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 CoS₂-carbon/TiO₂ composites. The composites obtained were also characterized by transmission electron microscopy and UV-Vis spectroscopy. CoS₂-carbon/TiO₂ composites showed excellent photocatalytic activity for the degradation of methylene blue under visible light irradiation. This was attributed to both photocatalysis on the TiO₂ support and charge transfer by the carbon nanomaterial, and the introduction of CoS₂ to enhance transfer of photogenerated electrons.

Key words: fullerene, carbon nanotube, graphene, cobalt disulfide, titanium dioxide, visible light, methylene blue, photodegradation

MENG Zeda, OH Wonchun. Photodegradation of Organic Dye by CoS₂ and Carbon(C₆₀, Graphene, CNT)/TiO₂ Composite Sensitizer[J]. 催化学报, 2012, 33(9): 1495-1501.

MENG Zeda, OH Wonchun. Photodegradation of Organic Dye by CoS₂ and Carbon(C₆₀, Graphene, CNT)/TiO₂ Composite Sensitizer[J]. Chinese Journal of Catalysis, 2012, 33(9): 1495-1501.

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Photodegradation of Organic Dye by CoS₂ and Carbon(C₆₀, Graphene, CNT)/TiO₂ Composite Sensitizer

Photodegradation of Organic Dye by CoS₂ and Carbon(C₆₀, Graphene, CNT)/TiO₂ Composite Sensitizer

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