Magnetic FeO@CoFe-LDH nanocomposite heterogeneously activated peroxymonosulfate for degradation of azo-dye AO7.

In this study, a novel core@shell magnetic nanocomposite FeO/CoFe-layered double hydroxide (FeO@CoFe-LDH) was successfully synthesized by the co-precipitation method, and then employed as an efficient heterogeneous catalyst for activation of peroxymonosulfate (PMS) in removal of azo-dye acid orange 7 (AO7). The as-obtained nanocomposite was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). The results from these characterizations showed FeO@CoFe-LDH to possess good ferromagnetism and a perfect crystalline structure with a typical core@shell morphology.