Synthesis and characterization of Janus Magnetic Nanoparticle of Fe3O4@SiO2

Abstract

Janus Magnetic Nanoparticle (JMNP) Fe₃O₄@SiO₂ was synthesized by a simple and low-cost method (Co-precipitation method). JMNP Fe₃O₄@SiO₂ was functionalized by using beta-cyclodextrin (β-CD) .The structure, magnetic behavior, and applicability of JMNP Fe₃O₄@SiO₂@ β-CD were studied. Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Vibrating Sample Magnetometer (VSM) and Energy-dispersive X-ray spectroscopy (EDX) were used to characterize the synthesized nanoparticles. VSM indicated that the JMNP Fe₃O₄@SiO₂ has a weak ferromagnetic behavior (Hc = 65.748G) at temperature 300 K and an emu / gG permeability of 35.759 * 10^-3 was calculated. The SEM images showed  that the particle size is 40nm.