Study of the photochemically generated of oxygen species by fullerene photosensitized CoS2 nanocompounds

• Reactive oxygen species was detected through oxidation reaction from DPCI to DPCO.
• Generated reactive oxygen species and hydroxyl radicals can be analysis by DPCI degradation.
• C60 has good effect during the photo-degradation processes.
• Photocatalytic activity attributed to photo-absorption effect by C60 and cooperative effect of CoS2.

Reactive oxygen species (ROS) can be produced by interactions between sunlight and light-absorbing substance in natural water environment and can completely destroy various organic pollutants in wastewaters. In this study, CoS2 and CoS2–fullerene were irradiated by visible light respectively. The generation of reactive oxygen species were detected through the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). In comparison with the separate effects of CoS2 and fullerene nanoparticles, the photochemically effect of the fullerene photosensitized CoS2 composites is increased significantly due to the synergetic effect between the fullerene and the CoS2 nanoparticles.

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