Synthesis, characterization and magnetic properties of CoFe2O4 nanorods

In this work, we demonstrated a new precursor route to synthesize CoFe2O4 one-dimensional (1D) nanorods. CoFe2O4 nanorods were prepared via the thermal decomposition of CoFe2(C2O4)3 nanorod precursor, which was prepared by solvothermal method without the assistance of template or surfactant. The microstructure and magnetic property of the obtained products were characterized by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), thermogravimetric (TG) and differential thermal analysis (DTA) and vibrating sample magnetometer (VSM). The results showed that the as-prepared CoFe2O4 nanorods were built by magnetic nanoparticles after calcining the precursor nanorods at different temperatures, and the size variation of magnetic nanoparticles with calcination temperatures leaded to variable magnetic properties.

► CoFe2O4 1D nanorods were prepared by the precursor route.
► The precursor was prepared by solvothermal method without assistance of template.
► The as-prepared CoFe2O4 nanorods were built by plenty of magnetic nanoparticles.
► The magnetic property of CoFe2O4 nanorods was dependent on calcination temperature.