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Statements

Subject Item
n2:RIV%2F62243136%3A_____%2F08%3A%230000096%21RIV11-MPO-62243136
rdf:type
skos:Concept n10:Vysledek
dcterms:description
Ion exchange of Na+ in geopolymer by Cs+, NH4+ and Co2+ was used to characterize the accessibility of the inner volume of a geopolymer and the size of the rings controlling the mobility of cations in the geopolymer matrix. UV-Vis spectroscopy of Co2+ ions in the Co2+ exchanged samples was used to characterize local structures serving as cationic sites of Co2+ ions in the geopolymer. Na-geopolymer exhibits ion-exchange properties similar to those of zeolites. All Na+ ions could be ion-exchanged by NH4+ or Co2+ ions. This indicates that all the Al atoms are accessible through rings containing at least eight Al and Si atoms. On contrary, Cs+ ion exchange evidence that only one half of the Al atoms are simultaneously accessible through ten- or larger rings. Co2+ ions in the geopolymer network are accommodated in two types of deformed six- or eight-rings. Neither regular six-rings nor the hexagonal prisms are present in the geopolymer network. Ion exchange of Na+ in geopolymer by Cs+, NH4+ and Co2+ was used to characterize the accessibility of the inner volume of a geopolymer and the size of the rings controlling the mobility of cations in the geopolymer matrix. UV-Vis spectroscopy of Co2+ ions in the Co2+ exchanged samples was used to characterize local structures serving as cationic sites of Co2+ ions in the geopolymer. Na-geopolymer exhibits ion-exchange properties similar to those of zeolites. All Na+ ions could be ion-exchanged by NH4+ or Co2+ ions. This indicates that all the Al atoms are accessible through rings containing at least eight Al and Si atoms. On contrary, Cs+ ion exchange evidence that only one half of the Al atoms are simultaneously accessible through ten- or larger rings. Co2+ ions in the geopolymer network are accommodated in two types of deformed six- or eight-rings. Neither regular six-rings nor the hexagonal prisms are present in the geopolymer network.
dcterms:title
Metal ion as probes for the characterization of geopolymer materials Metal ion as probes for the characterization of geopolymer materials
skos:prefLabel
Metal ion as probes for the characterization of geopolymer materials Metal ion as probes for the characterization of geopolymer materials
skos:notation
RIV/62243136:_____/08:#0000096!RIV11-MPO-62243136
n4:aktivita
n9:P
n4:aktivity
P(FT-TA4/068)
n4:cisloPeriodika
91(9)
n4:dodaniDat
n14:2011
n4:domaciTvurceVysledku
n15:8032726
n4:druhVysledku
n12:J
n4:duvernostUdaju
n17:S
n4:entitaPredkladatele
n8:predkladatel
n4:idSjednocenehoVysledku
378683
n4:idVysledku
RIV/62243136:_____/08:#0000096
n4:jazykVysledku
n11:eng
n4:klicovaSlova
geopolymer, metal ions
n4:klicoveSlovo
n7:geopolymer n7:metal%20ions
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[7449BF3D0DFA]
n4:nazevZdroje
Journal of American Ceramic Society
n4:obor
n16:JN
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
5
n4:projekt
n5:FT-TA4%2F068
n4:rokUplatneniVysledku
n14:2008
n4:svazekPeriodika
2008
n4:tvurceVysledku
Dědeček, J. Sobalík, Z. Tvarůžková, Z. Šubrt, J. Bortnovský, Oleg
s:issn
1551-2916
s:numberOfPages
6