NANOSCOPIC COBALT FERRITE PARTICLES BY SONOLYSIS OF METAL ACETYLACETONATE COMPLEXES

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00051212" target="_blank" >RIV/00216224:14310/09:00051212 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

čeština

Original language name

NANOSCOPIC COBALT FERRITE PARTICLES BY SONOLYSIS OF METAL ACETYLACETONATE COMPLEXES

Original language description

Previously we studied the preparation of Fe2O3 and Co3O4 nanoparticles by sonolysis of 2,4-pentanedionato complexes, M(acac)n, M = Fe, Co. Now we continue this research with the preparation of mixed metal oxide CoFe2O4. Sonochemical decompositon of mixtures of M(acac)n by high intensity ultrasound lead to amorphous Co ferrite nanoparticles containing organic matrix. The sonochemical reactivity of precursors was: Co(acac)2 &gt; Fe(acac)3 &gt; Co(acac)3. The XRD data showed that phase-pure CoFe2O4 were obtained for Co:Fe ratios of 1:1.3 to 1:2.0. Variable amounts of added water allowed control of the organics content and the BET surface area (up to 218 m2 g-1). SEM was used to examine the particle shape, size, and size distribution. The organic groups present in the powders were identified by IR and MS as acetate groups. TEM study showed the amorphous state of the sonochemical oxide product and its crystallization above 300 oC in agreement with the results of TG/DSC.

Czech name

NANOSCOPIC COBALT FERRITE PARTICLES BY SONOLYSIS OF METAL ACETYLACETONATE COMPLEXES

Czech description

Previously we studied the preparation of Fe2O3 and Co3O4 nanoparticles by sonolysis of 2,4-pentanedionato complexes, M(acac)n, M = Fe, Co. Now we continue this research with the preparation of mixed metal oxide CoFe2O4. Sonochemical decompositon of mixtures of M(acac)n by high intensity ultrasound lead to amorphous Co ferrite nanoparticles containing organic matrix. The sonochemical reactivity of precursors was: Co(acac)2 &gt; Fe(acac)3 &gt; Co(acac)3. The XRD data showed that phase-pure CoFe2O4 were obtained for Co:Fe ratios of 1:1.3 to 1:2.0. Variable amounts of added water allowed control of the organics content and the BET surface area (up to 218 m2 g-1). SEM was used to examine the particle shape, size, and size distribution. The organic groups present in the powders were identified by IR and MS as acetate groups. TEM study showed the amorphous state of the sonochemical oxide product and its crystallization above 300 oC in agreement with the results of TG/DSC.

Type

O - Miscellaneous

CEP classification

CA - Inorganic chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů