Synthesis of Iron Oxide Nanoparticles by Thermal Decomposition of Cryochemically Modified Precursors

Highly dispersed powders of superparamagnetic iron oxides of various morphologies are obtained by the thermal decomposition of formate and ammonium citrate of iron(III), subjected to cryochemical treatment by the spray cryogenic drying method. The composition and structure of the obtained particles and cryo-modified precursor salts are characterized by the following physicochemical methods: X-ray diffraction analysis, thermoanalytical methods (TG, DSC), IR spectroscopy, scanning electron microscopy, and the chromatographic method for determining the specific surface by the thermal desorption of argon.