Nanoscopic iron oxide from sonolysis of Fe(acac)3

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Authors

PINKAS Jiří REICHLOVÁ Vendula MORAVEC Zdeněk ZBOŘIL Radek BEZDIČKA Petr

Year of publication 2006
Type Article in Proceedings
Conference 10th Meeting of the European Society of Sonochemistry
MU Faculty or unit

Faculty of Science

Citation
Field Inorganic chemistry
Keywords Sonochemistry; synthesis; mixed-metal oxides; iron
Description We prepared nanoscopic particles of amorphous iron oxide by sonolysis [1] of tris(2,4-pentanedionato)iron, Fe(acac)3, under Ar atmosphere in tetraglyme with a variable amount of added water. SEM showed nanoscopic particles of a uniform size distribution and nearly spherical shapes with a diameter of about 20 nm. The organic components of the powder were identified by IR spectroscopy as acetate groups. TEM and the in-field Mössbauer spectra revealed evidence for the amorphous nature of the iron oxide product. Nanoparticles were superparamagnetic and the Mössbauer blocking temperature was extremely low with a sharp transition around 20 K. Thermal behavior of the powders was studied by TG, magnetic TG, DTA, and DSC analysis, Mössbauer spectroscopy and HT XRD.
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