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Olga I. Vernaya, Alexey
S. Shumilkin, Andrey V. Shabatin, Tatiana I. Shabatina, Mikhail
Ya. Melnikov
Synthesis of iron oxides nanoparticles by thermal
decomposition of cryochemically modified iron(III) acetylacetonate
Abstract
Highly dispersed powders of
superparamagnetic iron oxides of various morphologies are obtained by thermal
decomposition of formate and ammonium citrate of iron(III), subjected to
cryochemical treatment by the method of spray cryogenic drying. The composition
and structure of the obtained particles and cryo-modified precursor salts were
characterized by the following physicochemical methods: X-ray diffraction
analysis, thermoanalytical methods (TG, DSC), IR spectroscopy, scanning
electron microscopy, and chromatographic method for determining the specific
surface by thermal desorption of argon.
Key words: nanoparticles, superparamagnetic iron oxides,
maghemite, magnetite, iron(III) formate, ammonium iron(III) citrate,
cryochemical modification, thermal decomposition
Copyright (C) Chemistry Dept., Moscow State University, 2002
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