Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2013 m. Nr. 2 Synthesis of cobalt ferrite nanoparticles by co-precipitation
at ambient and hydrothermal conditions
We report the peculiarities of the synthesis of cobalt ferrite nanoparticles by complexassisted co-precipitation route under ambient pressure in argon atmosphere and under increased pressure conditions. CoxFe3-xO4 nanoparticles with x from 0.3 to 1.0 in size of 1–20 nm were fabricated. The impact of the solution composition and reaction conditions on the size and stoichiometry of cobalt ferrite nanoparticles obtained were evaluated. Finally, the influence of post-growth treatments, such as washings, neutralization and centrifugations, on the hydrodynamic size of nanoparticles is presented and discussed. The nanoparticles were characterized by means of transmission and high resolution transmission electron microscopy (TEM, HRTEM), energy dispersive X-ray, Mössbauer and dynamic light scattering spectroscopy and atomic force microscopy (AFM).
Keywords: co-precipitation, ferrites, nanoparticles, characterization |
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