Structure, magnetic, and optical properties of NiFe2O4 nanoparticle doped on the surface of Carbon nanotube as a substrate

In this research, we investigate the effect of carbon nanotubes (CNTs) as a substrate on the morphology, size, magnetic behavior, and band gap energy (Eg) of nickel ferrite nanoparticles. Synthesis of NiFe2O4 nanoparticles carried out using a direct co-precipitation method in aqueous solution containing carbon nanotubes. The samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible Spectrophotometer, and vibrating sample magnetometer (VSM). The results showed that using the CNT as a supporter reduced the size and band gap energy of NiFe2O4 nanoparticles, changed the morphology of the powder from an aggregate state to a filament state and it increased the magnetic saturation properties of nanoparticles.