Efficient degradation of crystal violet by GO/CuMn2O4 nanocomposite via peroxymonosulfate activation

The utilization of persulfate-based advanced oxidation processes (PS-AOPs) in the presence of nanomaterials has gained increased attention for the degradation of organic pollutants. Herein, a new methodology was described for the fabrication of GO/CuMn2O4 nanocomposite for proxymonosulfate (PMS) activation in crystal violet (CV) degradation. The exfoliated GO sheets helped to control the crystallinity of CuMn2O4 spontaneously with induce oxygen vacancies (OVs). Moreover, the active sites of copper and manganese and the high electronic conductivity of GO in nanocomposite exhibited a vital role in PMS activation for creating reactive oxygen radicals (ROS). The prepared nanocomposite indicated the highest degradation rate of CV (97 %) within 35 min with a rate constant of 0.101 min−1. Furthermore, the scavenging technique demonstrated that the SO4− and OH radicals have a very important role in the removal reaction. The results indicated that the CV degradation in the presence of GO/CuMn2O4 was better than alone-CuMn2O4, confirming the synergistic effect of GO layers with metal oxides. The current study has paved a new insight to employ bimetal oxide materials in the design of efficient nanocomposites for organic pollution degradation in wastewater.