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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F08%3A00026052%21RIV10-MSM-14310___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
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. 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.
dcterms:title
Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes
skos:prefLabel
Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes Nanoscopic Cobalt Ferrite by Sonolysis of M(acac)3 Complexes
skos:notation
RIV/00216224:14310/08:00026052!RIV10-MSM-14310___
n3:aktivita
n18:Z
n3:aktivity
Z(MSM0021622410)
n3:dodaniDat
n13:2010
n3:domaciTvurceVysledku
n5:2274329 n5:2451077 n5:7933665 n5:8017557 n5:9251189
n3:druhVysledku
n6:D
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
381616
n3:idVysledku
RIV/00216224:14310/08:00026052
n3:jazykVysledku
n4:eng
n3:klicovaSlova
Sonochemistry; Iron; Cobalt; Oxides; Ferrite; Nanoparticles
n3:klicoveSlovo
n17:Iron n17:Sonochemistry n17:Nanoparticles n17:Cobalt n17:Ferrite n17:Oxides
n3:kontrolniKodProRIV
[DE3E60BCAD13]
n3:mistoKonaniAkce
La Grande Motte, Francie
n3:mistoVydani
Basancon, Francie
n3:nazevZdroje
11 th Meeting of the European Society of Sonochemistry
n3:obor
n12:CA
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n13:2008
n3:tvurceVysledku
Pinkas, Jiří Bezdička, Petr Ostřížek, Petr Zbořil, Radek Moravec, Zdeněk
n3:typAkce
n20:WRD
n3:zahajeniAkce
2008-01-01+01:00
n3:zamer
n19:MSM0021622410
s:issn
1350-4177
s:numberOfPages
2
n10:hasPublisher
UTINAM Universite de Franche-Comte
n11:organizacniJednotka
14310