Concerted catalytic and photocatalytic degradation of organic pollutants over CuS/g-CN catalysts under light and dark conditions.

Organic pollutants in industrial and agricultural sewage are a serious threat to the environment and human health. Achieving continuous photocatalytic degradation of organic pollutants under light and dark conditions would have exciting implications for practical sewage treatment. In this paper, CuS/g-CN composite catalysts with CuS nanoparticles anchored on g-CN sheets were successfully fabricated a simple solvothermal reaction. The morphology, structure, optical absorption characteristics, electron-hole recombination rate, and degradation performance of the as-prepared CuS/g-CN catalysts were investigated in detail. The results confirmed that the as-fabricated CuS/g-CN catalysts exhibited high Fenton-like catalytic degradation efficiencies in the dark, and rapid concerted Fenton-like catalytic, direct HO photocatalytic and CuS/g-CN photocatalytic degradation activities under visible light. Thus, the as-fabricated CuS/g-CN catalysts can degrade organic pollutants continuously during both day and night. These degradation properties, along with the simple catalyst fabrication process, will facilitate the practical application of this system in the continuous removal of organic pollutants.