Simple Synthesis and Characterization of Cobalt Ferrite Nanoparticles by a Thermal Treatment Method

Mahmoud Goodarz Naseri,Hossein Abbastabar Ahangar,Elias B. Saion,Mansor Hashim,Abdul Halim Shaari

doi:10.1155/2010/907686

Abstract

Crystalline, magnetic, cobalt ferrite nanoparticles were synthesized from an aqueous solution containing metal nitrates and polyvinyl pyrrolidone (PVP) as a capping agent by a thermal treatment followed by calcination at various temperatures from 673 to 923 K. The structural characteristics of the calcined samples were determined by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), and transmission electron microscopy (TEM). A completed crystallization occurred at 823 and 923 K, as shown by the absence of organic absorption bands in the FT‐IR spectrum. Magnetization measurements were obtained at room temperature by using a vibrating sample magnetometer (VSM), which showed that the calcined samples exhibited typical magnetic behaviors.

Highlights

The spinel ferrite structure with the formula of MFe2O4 (M = Co, Ni, Zn, or other metals) can be described as a cubic, closely packed arrangement of oxygen atoms, and M2+ and Fe3+ ions can occupy either tetrahedral (A) or octahedral (B) sites [1]
Crystalline, magnetic, cobalt ferrite nanoparticles were synthesized from an aqueous solution containing metal nitrates and polyvinyl pyrrolidone (PVP) as a capping agent by a thermal treatment followed by calcination at various temperatures from 673 to 923 K
As the calcination temperature increases, the diffraction peaks become sharper and narrower, and their intensity increases

Summary

Introduction

Cobalt ferrite has been widely studied due to its high electromagnetic performance, excellent chemical stability, mechanical hardness, high coercivity, and moderate saturation magnetization, which make it a good candidate for the electronic components used in computers, recording devices, and magnetic cards [2,3,4] These properties are dependent on chemical composition and microstructural characteristics, which can be controlled in the fabrication and synthesis processes. Cobalt ferrite nanoparticles were synthesized from an aqueous solution containing metal nitrates, polyvinyl pyrrolidone, and deionized water using a thermal treatment method followed by crushing and calcination This method does not require the addition of any other chemicals to the solution, and it has the advantages of simplicity, a low cost, a lack of by-product effluents, and an environmentally friendly operation. The textural and morphological characteristics of the prepared cobalt ferrite nanoparticles were studied with various techniques to verify the particle size and distribution as well as to explore other parameters of interest

Experimental

Results and Discussion

Conclusion