Synthesis and characterisation of pure single-phase CoFe₂O₄ nanopowder via a simple aqueous solution-based EDTA-precursor route

Abstract

Single-phase cobalt ferrite (CoFe 2 O 4 ) nanopowder, with average particle size �20 nm, has been synthesised using an ethylene diamine tetra acetic acid precursor-based method. CoFe 2 O 4 nanopowder was obtained by calcining precursor at 550 � C for 4 h in air. The change of microstructure of the synthesised CoFe 2 O 4 with increasing sintering temperature was studied using scanning electron microscopy. DC electrical resistivities of unsintered and sintered samples were measured using a two-probe method. Room temperature magnetic hysteresis measurement revealed that the synthesised CoFe 2 O 4 nanopowder exhibited ferromagnetic behaviour at room temperature with saturation magnetisation of 67.55 emu/g and coercivity of 1645.24 Oe.

Synthesis and potent antimicrobial activity of CoFe2O4 nanoparticles under visible light

“…As shown in the figure, the peaks at 2 θ values of 30.19°, 35.532°, 43.17°, 53.54°, 57.087°, 62.682° and 74.20° were respectively corresponded to 226, 778, 185, 92, 265, 424, and 86 reflections of CoFe 2 O 4 . All 2 θ X-ray diffraction (XRD) observed in this study consistent with reports from other researchers concerning the synthesis of CoFe 2 O 4 [ 3 , [46] , [47] , [48] ]. The remarkable property was that no impurity phase was observed in the synthetized powders [ 49 , 50 , 51 ].…”

“…Of all different spinel ferrites, CoFe 2 O 4 has attracted special attention on account of its unique physical features, including high Curie temperature, large magneto crystalline anisotropy, high coactivity, excellent chemical stability, large magnetostrictive coefficient, mechanical hardness and, moderate saturation magnetization [ 3 ]. The other advantage of CoFe 2 O 4 nanoparticles is one order higher of magnetocrystalline anisotropy compared to other reported metal ferrite nanoparticles with the same saturation magnetization.…”

Synthesis, characterization, and properties of flexible magnetic nanocomposites of cobalt ferrite–polybenzoxazine–linear low‐density polyethylene

“…The detailed synthetic procedure and characterization of CF nanopowders were reported elsewhere. 12 In a typical synthesis, cobalt nitrate, iron(III) nitrate, and EDTA were used as starting compounds. A fluffy, browncolored precursor was obtained by the reaction of stoichiometric amount of aqueous solutions of metal nitrates with EDTA, followed by evaporation of the reaction mixture to dryness at about 125 C. Calcination of the precursor powder at 550 C for 4 h in air resulted in the formation of CF nanopowders.…”

Effect of heat treatment on the microstructural properties of silica embedded cobalt ferrite nanocomposites

“…This weight loss might be due to the oxidative decomposition of precursors. The presence of a strong peak around 208 C attributes to the decomposition of precursors in the DTG curve [28,29]. In the third stage (351-600 C), a constant weight loss is observed leading to the formation of an intermediate structure.…”