synthesis and characterization of fe3o4@c@γ-al2o3 core@double-shell nanocomposite

an efficient magnetic carbon nanospheres supported γ-al₂o₃ as a core@double-shell nanocomposite has been prepared by a three-step process in this report. the morphology, inner structure and magnetic properties of all products were studied with x-ray powder diffraction (xrd), energy dispersive x-ray spectroscopy (edx), field-emission scanning electron microscopy (fe-sem) and vibrating sample magnetometer (vsm) tests. the fe₃o₄@c@γ-al₂o₃ nanocomposite showed excellent particle monodispersity and uniform particle diameter of 100-300 nm. the synthesized nanocomposite showed great magnetic property (52.3 emu/g), which made it has potential for application in magnetic nanodevices and nanocatalysts.