Structural, Surface, Magnetic Study and Application of Nanoparticles CoFe2O4, ZnO and its Nanocomposite
M. M. Arman, S.I. El‐Dek
Abstract
Abstract Nanoparticles of CoFe 2 O 4 and ZnO were synthesized using the citrate auto-combustion method. A nanocomposite CoFe 2 O 4 /ZnO (70:30) was prepared. XRD verified that the samples were synthesized in nanoscale with crystallite sizes of 66.01, 12.48, and 17.47, respectively. The HRTEM image of CoFe 2 O 4 illustrates the cubic structure. FESEM showed that the shape of CoFe 2 O 4 , ZnO, and CoFe 2 O 4 /ZnO nanoparticles is nearly spherical in morphology. EDAX measurements illustrated that the samples were obtained with nominal compositions similar to their chemical formula. XPS spectra of the investigated CoFe 2 O 4 confirmed the presence of Co 2+ and Co 3+ ions, as well as Fe 3+ and Fe 2+ ions. The saturation magnetization increased for CoFe 2 O 4 /ZnO than that of the parent CoFe 2 O 4 due to strong ferromagnetic coupling. Antibacterial activity was recorded for the nanocomposite despite its absence from the two parents.