Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes

Popis výsledku v původním jazyce

We examined the sonochemical synthesis of CoFe2O4. Composite nanoscopic particles consisting of Co-Fe oxide particles and an organic matrix were prepared by sonolysis of mixtures of 2,4-pentanedionato complexes, M(acac)n, M = Fe, Co; n = 2, 3. The XRD results showed that phase pure CoFe2O4 samples were prepared with a molar content of Co:Fe from 1:1.3 to 1:2.0. Addition of variable amounts of water was found to facilitate the decomposition of precursor complexes. That allowed control of the organics content and the BET surface area of the oxide nanoparticles. Powders with specific surface area as high as 218 m2 g-1 were obtained. FE-SEM was used to examine particle shape, size, and size distribution with an estimated diameter of 20-30 nm. Variable temperature XRD also revealed the spinel crystallization on heating. A small particle size below 20 nm of the crystalline CoFe2O4 is retained up to 600 oC.

Název v anglickém jazyce

Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes

Popis výsledku anglicky

We examined the sonochemical synthesis of CoFe2O4. Composite nanoscopic particles consisting of Co-Fe oxide particles and an organic matrix were prepared by sonolysis of mixtures of 2,4-pentanedionato complexes, M(acac)n, M = Fe, Co; n = 2, 3. The XRD results showed that phase pure CoFe2O4 samples were prepared with a molar content of Co:Fe from 1:1.3 to 1:2.0. Addition of variable amounts of water was found to facilitate the decomposition of precursor complexes. That allowed control of the organics content and the BET surface area of the oxide nanoparticles. Powders with specific surface area as high as 218 m2 g-1 were obtained. FE-SEM was used to examine particle shape, size, and size distribution with an estimated diameter of 20-30 nm. Variable temperature XRD also revealed the spinel crystallization on heating. A small particle size below 20 nm of the crystalline CoFe2O4 is retained up to 600 oC.

Druh

D - Stať ve sborníku

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název statě ve sborníku

11 th Meeting of the European Society of Sonochemistry

ISBN

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ISSN

1350-4177

e-ISSN

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Počet stran výsledku

2

Strana od-do

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Název nakladatele

UTINAM Universite de Franche-Comte

Místo vydání

Basancon, Francie

Místo konání akce

La Grande Motte, Francie

Datum konání akce

1. 1. 2008

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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