Cobalt sulfide-reduced graphene oxide: An efficient catalyst for the degradation of rhodamine B and pentachlorophenol using peroxymonosulfate

In this study, cobalt sulfide-reduced graphene oxide (CoS-rGO) nanocomposite was prepared by a solvothermal route and its structure, morphology composition were assessed using various techniques, including transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron (XPS) thermogravimetric analysis (TGA). The catalytic performance of CoS-rGO evaluated for activation peroxymonosulfate (PMS) the elimination rhodamine B (RhB) pentachlorophenol (PCP) in water. effects operating parameters on degradation efficiency systematically studied. Under optimized conditions, CoS-rGO/PMS system achieved fast (less than 10 min) RhB PCP at room temperature, as evidenced high-performance liquid chromatographic (HPLC) analysis. Electron Paramagnetic Resonance (EPR) studies along with scavenging experiments revealed that sulfate radicals (SO4•−) primary players process. Interestingly, catalyst stable after 8 cycles without obvious activity loss. results reported present study hold promise potential application PMS organic pollutants.