The remarkable stability of magnetic core and -OH functional groups on the surface of silica-coated magnetite (Fe3O4@SiO2) nanoparticles make them an excellent candidate for functionalization and catalytic applications. In this study, a surface-modified solid support was fabricated by immobilizing sulfonic acid groups on magnetic nanoparticles (Fe3O4@SiO2@AE-SO3H). The structure of prepared hybrid nanostructure was characterized by various analyses, including Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA/DTG), vibrating sample magnetometr (VSM), the field emission scanning electron microscopy (FE-SEM), and the electron-dispersive X-ray spectroscopy (EDS). The catalytic activity of prepared hybrid nanomaterial was assessed in the synthesis of 1-amidoalkyl-2-naphthols, resulting in high yields of the desired products under environmentally friendly conditions. High yields, short reaction times, green solvent and conditions, easy workup procedure, reusability without a significant diminish in catalytic efficiency and simple separation of nanocatalyst by using an external magnet alongside the environmental compatibility and sustainability are some advantages of this method.
