About: Metal ion as probes for the characterization of geopolymer materials

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
Title	Metal ion as probes for the characterization of geopolymer materials Metal ion as probes for the characterization of geopolymer materials (en)
skos:prefLabel	Metal ion as probes for the characterization of geopolymer materials Metal ion as probes for the characterization of geopolymer materials (en)
skos:notation	RIV/62243136:_____/08:#0000096!RIV11-MPO-62243136
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(FT-TA4/068)
http://linked.open...iv/cisloPeriodika	91(9)
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Bortnovsky, Oleg
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Výzkumný ústav anorganické chemie, a.s.
http://linked.open...dnocenehoVysledku	378683
http://linked.open...ai/riv/idVysledku	RIV/62243136:_____/08:#0000096
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	geopolymer, metal ions (en)
http://linked.open.../riv/klicoveSlovo	metal ions geopolymer
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[7449BF3D0DFA]
http://linked.open...i/riv/nazevZdroje	Journal of American Ceramic Society
http://linked.open...in/vavai/riv/obor	JN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	*Progressive reinforced geopolymer composites for technical application.
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	2008
http://linked.open...iv/tvurceVysledku	Šubrt, J. Bortnovský, Oleg Dědeček, J. Sobalík, Z. Tvarůžková, Z.
issn	1551-2916
number of pages	6 (xsd:int)

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