Study of the Structural Phase Transformation of Iron Oxide Nanoparticles from an Fe2+ Ion Source by Precipitation under Various Synthesis Parameters and Temperatures

Materials Chemistry and Physics 2015
Andris Šutka, Santa Lagzdiņa, Tanel Käämbre, Rainer Pärna, Vambola Kisand, Jānis Kleperis, Mikhail Maiorov, Arvo Kikas, Ivar Kuusik, Dmitrijs Jakovļevs

Magnetite nanoparticles were precipitated from a pure aqueous ferrous salt solution in an air atmosphere. The influence of the solution molarity, the rate of precipitator agent addition, stirring time and annealing temperature was studied. The morphology, crystalline phase purity and magnetic properties of the obtained powders were studied by X-Ray powder diffraction (XRD), Scanning electron microscopy (SEM), Differential thermal analysis (DTA), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS) and Vibrating sample magnetometer (VSM). The synthesis conditions were seen to have an effect on phase composition. It was possible to obtain near stoichiometric Fe3O4 or a mixture of Fe3O4, γ-Fe2O3, α-Fe2O3 and FeOOH. Fe3O4 nanoparticles showed high saturation magnetization ~86 emu/g.

Atslēgas vārdi
Magnetic properties; Nanostructures; Oxides; Precipitation
DOI
10.1016/j.matchemphys.2014.10.048
Hipersaite
http://www.sciencedirect.com/science/article/pii/S0254058414006993

Šutka, A., Lagzdiņa, S., Käämbre, T., Pärna, R., Kisand, V., Kleperis, J., Maiorov, M., Kikas, A., Kuusik, I., Jakovļevs, D. Study of the Structural Phase Transformation of Iron Oxide Nanoparticles from an Fe2+ Ion Source by Precipitation under Various Synthesis Parameters and Temperatures. Materials Chemistry and Physics, 2015, Vol.149-150, 473.-479.lpp. ISSN 0254-0584. Pieejams: doi:10.1016/j.matchemphys.2014.10.048

Publikācijas valoda
English (en)