Synthesis of CoFe۲O۴ nanoparticles and investigation of the temperature, surfactant, capping agent and time effects on the size and magnetic properties

چکیده مقاله

CoFe2O4 nanoparticles were synthesized by hydrothermal method. The temperature, surfactant, capping agent and time effects on the size of CoFe2O4 nanoparticles were studied. Bis-(2-hydroxy-1-naphthaldehyde)-butanediamine Schiff-base ligand (L) used as a good capping agent to produce uniform cubic-like nanostructure. But when SDS was used as surfactant, nonuniform spherical nanoparticles were obtained. Nanoparticle was characterized using X-ray diffraction, energy-dispersive spectroscopy, scanning electron microscopy and Fourier transform infrared. The magnetic properties of the samples were investigated using VSM analyze. We found that the CoFe2O4 nanoparticles synthesized at temperature of 150 C exhibit a ferromagnetic behavior with a saturation magnetization of 19 emu/g and a coercivity of 200 Oe. The photocatalytic behavior of CoFe2O4 was investigated using the degradation of a Rhodamine B aqueous solution under ultraviolet light irradiation.