Fabrication of Copper(II)-Coated Magnetic Core-Shell Nanoparticles Fe3O4@SiO2: An Effective and Recoverable Catalyst for Reduction/Degradation of Environmental Pollutants

In this work, we report the synthesis of a magnetically recoverable catalyst through immobilizing copper (II) over Fe3O4@SiO2 nanoparticles (NPs) surface [Fe3O4@SiO2-L–Cu(II)] (L = pyridine-4-carbaldehyde thiosemicarbazide). Accordingly, synthesized catalysts were determined and characterized by energy dispersive X-ray spectrometry (EDS), diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FESEM), thermogravimetric-differential thermal analysis (TG-DTA) procedures. The was used for reduction Cr(VI), 4-nitrophenol (4-NP) organic dyes such as Congo Red (CR) methylene blue (MB) in aqueous media. Catalytic performance studies showed that [Fe3O4@SiO2–L–Cu(II)] has excellent activity toward reactions under mild conditions. Remarkable attributes method are high efficiency, removal homogeneous catalyst, easy recovery from reaction mixture, uncomplicated route. amount catalytic system almost constant after several stages reuse. results show easily separated retained 83% its efficiency five cycles without considerable loss stability.