Correlation Between Size of CoFe2O4 Nanoparticles Determined from Experimental and Calculated Data by Different Mathematical Models
Danut Gabriel Cozma, Daniel Gherca, Ionut Mihalcea, Constantin Virlan, Nicoleta Cornei and Aurel Pui
Affiliation: Faculty of Chemistry, University “Alexandru Ioan Cuza” from Iasi, Carol I Bvd. No. 11, Iasi 700506, Romania.
Keywords: Infrared spectroscopy, mathematical models, nanoparticles size, powder X-ray diffraction patterns.
This study reports the synthesis of CoFe2O4 nanoparticles by coprecipitation method in the presence of Linseed
Oil as surfactant. The capping agent was used to stabilize the particles and prevent their agglomeration. The characterization
studies were conducted by in situ X-ray diffraction, transmission electron microscopy, thermal analysis (TG-DTA)
and FTIR spectroscopy. The average particle sizes obtained by XRD data were used to obtain a correlation with size of
CoFe2O4 nanoparticles determined, using mathematical equations based on different models. The statistical studies show
that the cubic model gives a good correlation within the whole temperature range (100 – 850 °C). The result of these investigations
was very useful for establishing the optimal calcination temperature. FT-IR spectroscopy and thermogravimetric
analysis (TG) showed that the core-shell structure type of CoFe2O4 nanoparticles is stable below this annealing
temperature. TEM analysis indicates that the CoFe2O4 samples during the calcinations treatment were spherical in shape
and uniform in morphology and particles size.
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