Počet záznamů: 1

High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins

SYSNO ASEP	0347201
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins
Tvůrce(i)	Píšková, Anna (UACH-T) Bezdička, Petr (UACH-T)_{SAI, RID, ORCID} Hradil, David (UACH-T)_{RID, SAI} Káfuňková, E. (CZ) Lang, Kamil (UACH-T)_{SAI, RID, ORCID} Večerníková, Eva (UACH-T)_SAI Kovanda, F. (CZ) Grygar, Tomáš (UACH-T)
Zdroj.dok.	Applied Clay Science. - : Elsevier - ISSN 0169-1317 Roč. 49, č. 4 (2010), s. 363-371
Poč.str.	9 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	smectite ; Layered double hydroxides ; thermal decomposition
Vědní obor RIV	CB - Analytická chemie, separace
CEP	GA203/06/1244 GA ČR - Grantová agentura ČR
	KAN100500651 GA AV ČR - Akademie věd
	IAA3032401 GA AV ČR - Akademie věd
CEZ	AV0Z40320502 - UACH-T (2005-2011)
UT WOS	000281425700004
DOI	10.1016/j.clay.2009.09.004
Anotace	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.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2011

Počet záznamů: 1