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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F13%3A33145066%21RIV14-MSM-15310___
rdf:type
skos:Concept n17:Vysledek
rdfs:seeAlso
http://pubs.rsc.org/en/content/articlepdf/2013/ra/c3ra42233j
dcterms:description
We present the first direct evidence that reactant particle size determines the mechanism of thermally, induced solid-state reactions and can be used as the tuner of the product crystal structure. This control of the polymorphous character of the products through the particle size of precursor is demonstrated upon following the process of isothermal decomposition of Prussian Blue at 350 uC in air. The reaction mechanism was studied by 57Fe Mossbauer spectroscopy, X-ray powder diffraction, magnetization measurements, and transmission and scanning electron microscopy. The decomposition of Prussian Blue nanoparticles (10-15 nm) gave preferential formation of c-Fe2O3 nanoparticles (10-20 nm), while Prussian Blue microcrystals (20-50 mm) afforded formation of b-Fe2O3 nanoparticles (50-70 nm). The final polymorphous composition of the iron(III) oxide product is thought to be driven by the different diffusion conditions for penetration of the reaction gas (oxygen) into the Prussian Blue crystals as well as release of the gas (dicyane) during the Prussian Blue decomposition. Therefore, the reactant particle size control provides a new method for the large-scale preparation of rare b-Fe2O3 nanoparticles. We present the first direct evidence that reactant particle size determines the mechanism of thermally, induced solid-state reactions and can be used as the tuner of the product crystal structure. This control of the polymorphous character of the products through the particle size of precursor is demonstrated upon following the process of isothermal decomposition of Prussian Blue at 350 uC in air. The reaction mechanism was studied by 57Fe Mossbauer spectroscopy, X-ray powder diffraction, magnetization measurements, and transmission and scanning electron microscopy. The decomposition of Prussian Blue nanoparticles (10-15 nm) gave preferential formation of c-Fe2O3 nanoparticles (10-20 nm), while Prussian Blue microcrystals (20-50 mm) afforded formation of b-Fe2O3 nanoparticles (50-70 nm). The final polymorphous composition of the iron(III) oxide product is thought to be driven by the different diffusion conditions for penetration of the reaction gas (oxygen) into the Prussian Blue crystals as well as release of the gas (dicyane) during the Prussian Blue decomposition. Therefore, the reactant particle size control provides a new method for the large-scale preparation of rare b-Fe2O3 nanoparticles.
dcterms:title
Thermal decomposition of Prussian Blue microcrystals and nanocrystals - iron(III) oxide polymorphism control through reactant particle size Thermal decomposition of Prussian Blue microcrystals and nanocrystals - iron(III) oxide polymorphism control through reactant particle size
skos:prefLabel
Thermal decomposition of Prussian Blue microcrystals and nanocrystals - iron(III) oxide polymorphism control through reactant particle size Thermal decomposition of Prussian Blue microcrystals and nanocrystals - iron(III) oxide polymorphism control through reactant particle size
skos:notation
RIV/61989592:15310/13:33145066!RIV14-MSM-15310___
n17:predkladatel
n20:orjk%3A15310
n3:aktivita
n18:P
n3:aktivity
P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(EE2.3.20.0058)
n3:cisloPeriodika
42
n3:dodaniDat
n11:2014
n3:domaciTvurceVysledku
n7:7321023 n7:5207193 n7:7266065 Zoppellaro, Giorgio n7:3883620 n7:7008686 n7:7125100 n7:9251189
n3:druhVysledku
n19:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
110891
n3:idVysledku
RIV/61989592:15310/13:33145066
n3:jazykVysledku
n21:eng
n3:klicovaSlova
nanotubes, precursor; crystal-structure, beta-Fe2O3, functionalization, nanomaterials, alpha-Fe2O3; Mössbauer-spectroscopy, maghemite nanoparticles, magnetic-properties
n3:klicoveSlovo
n6:M%C3%B6ssbauer-spectroscopy n6:crystal-structure n6:functionalization n6:nanotubes n6:alpha-Fe2O3 n6:beta-Fe2O3 n6:magnetic-properties n6:precursor n6:nanomaterials n6:maghemite%20nanoparticles
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[DFCFA81818E4]
n3:nazevZdroje
RSC Advances
n3:obor
n13:CF
n3:pocetDomacichTvurcuVysledku
8
n3:pocetTvurcuVysledku
8
n3:projekt
n4:EE2.3.20.0017 n4:ED2.1.00%2F03.0058 n4:EE2.3.20.0058
n3:rokUplatneniVysledku
n11:2013
n3:svazekPeriodika
3
n3:tvurceVysledku
Marušák, Zdeněk Pechoušek, Jiří Machala, Libor Filip, Jan Zbořil, Radek Šafářová, Klára Tuček, Jiří Zoppellaro, Giorgio
n3:wos
000325554400049
s:issn
2046-2069
s:numberOfPages
9
n16:doi
10.1039/C3RA42233J
n5:organizacniJednotka
15310