Controlled preparation of monodisperse CoFe₂O₄ nanoparticles by a facile method

Abstract

CoFe₂O₄ nanoparticles (NPs) were synthesized by coprecipitation method using FeCl₃·6H₂O and CoCl₂·6H₂O as precursors. The synthesized conditions were optimized, such as added means of precipitator, quantity of precipitator, the mol ratio of Fe³⁺ to Co²⁺, reaction temperature and pH value. The synthesized material was characterized by XRD, TEM, FTIR, EDS, Raman and its magnetic properties were studied by VSM. The experimental results confirm that the sample is cubic spinel structure CoFe₂O₄ with a narrow size distribution and a good dispersion feature. CoFe₂O₄ NPs with well-controlled shape and size was obtained at 70 °C. The magnetic properties indicate superparamagnetic behavior and good saturated magnetization.

Keywords

CoFe₂O₄ nanoparticles / coprecipitation method / monodispersity / superparamagnetism

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