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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F10%3A00347201%21RIV11-GA0-61388980
rdf:type
skos:Concept n4:Vysledek
dcterms:description
We have analyzed expandable clay minerals and layered double hydroxides with different interlayer ions by high-temperature X-ray powder diffraction (HT-XRD) with comparison to thermal analysis (DTG/DTA) coupled with evolved gas analysis (EGA). We described in detail their thermal behaviour with emphasis to the differences among samples related to their crystallochemical characteristics. Porphyrin-intercalated smectites have a quite unique thermal behaviour as monitored by HT-XRD; the intercalates with tetrakis (1-methyl-4-pyridinio)porphyrin have a basal spacing of about 1.4 nm and are thermally stable up to ca. 600 degrees C. The resolution of the individual dehydration steps of smectites (from 2-layer hydrate via 1-layer hydrate to the anhydrous form) is much better in HT-XRD then in DTG/EGA curves. Layered double hydroxides (LDHs) have a varying thermal stability depending on their chemical composition and crystallinity. We have analyzed expandable clay minerals and layered double hydroxides with different interlayer ions by high-temperature X-ray powder diffraction (HT-XRD) with comparison to thermal analysis (DTG/DTA) coupled with evolved gas analysis (EGA). We described in detail their thermal behaviour with emphasis to the differences among samples related to their crystallochemical characteristics. Porphyrin-intercalated smectites have a quite unique thermal behaviour as monitored by HT-XRD; the intercalates with tetrakis (1-methyl-4-pyridinio)porphyrin have a basal spacing of about 1.4 nm and are thermally stable up to ca. 600 degrees C. The resolution of the individual dehydration steps of smectites (from 2-layer hydrate via 1-layer hydrate to the anhydrous form) is much better in HT-XRD then in DTG/EGA curves. Layered double hydroxides (LDHs) have a varying thermal stability depending on their chemical composition and crystallinity.
dcterms:title
High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins
skos:prefLabel
High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins
skos:notation
RIV/61388980:_____/10:00347201!RIV11-GA0-61388980
n5:aktivita
n8:P n8:Z
n5:aktivity
P(GA203/06/1244), P(IAA3032401), P(KAN100500651), Z(AV0Z40320502)
n5:cisloPeriodika
4
n5:dodaniDat
n6:2011
n5:domaciTvurceVysledku
n7:4208994 n7:5758491 n7:2204606 n7:3009459 n7:7933665
n5:druhVysledku
n17:J
n5:duvernostUdaju
n10:S
n5:entitaPredkladatele
n13:predkladatel
n5:idSjednocenehoVysledku
261614
n5:idVysledku
RIV/61388980:_____/10:00347201
n5:jazykVysledku
n18:eng
n5:klicovaSlova
smectite; Layered double hydroxides; thermal decomposition
n5:klicoveSlovo
n14:smectite n14:Layered%20double%20hydroxides n14:thermal%20decomposition
n5:kodStatuVydavatele
NL - Nizozemsko
n5:kontrolniKodProRIV
[7041E01306B2]
n5:nazevZdroje
Applied Clay Science
n5:obor
n16:CB
n5:pocetDomacichTvurcuVysledku
5
n5:pocetTvurcuVysledku
8
n5:projekt
n11:GA203%2F06%2F1244 n11:KAN100500651 n11:IAA3032401
n5:rokUplatneniVysledku
n6:2010
n5:svazekPeriodika
49
n5:tvurceVysledku
Píšková, A. Večerníková, Eva Lang, Kamil Hradil, David Bezdička, Petr Grygar, Tomáš Kovanda, F. Káfuňková, E.
n5:wos
000281425700004
n5:zamer
n12:AV0Z40320502
s:issn
0169-1317
s:numberOfPages
9