Structural Investigation of MFe2O4 (M = Fe, Co) Magnetic Fluids
作者： Guilherme V. M. Jacintho , Alexandre G. Brolo , Paola Corio , Paulo A. Z. Suarez , Joel C. Rubim
DOI: 10.1021/JP9013477
关键词:
摘要: Ferrites of the type MIIFe2O4 (M = Fe and Co) have been prepared by traditional coprecipitation method. These ferrites were modified adsorption fatty acids derived from soybean castor oil then dispersed in cyclohexane, providing very stable magnetic fluids, readily usable nonpolar media. The structural properties as well fluids characterized XRD (X-ray powder diffraction), TEM (transmission electron microscopy), DRIFTS (diffusion reflectance infrared Fourier transform spectroscopy), FTNIR (Fourier near-infrared), UV−vis, normal Raman spectroscopy, surface-enhanced scattering (SERS). analysis shown that nanoparticles (nonmodified modified) present diameters range 10−15 nm. measurements carboxylate groups adsorb on ferrite surface, forming three different structures: a bridging bidentat...
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