Number of the records: 1

Effect of hydrothermal treatment on properties of Ni-Al layered double hydroxides and related mixed oxides

SYSNO ASEP	0323573
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Effect of hydrothermal treatment on properties of Ni-Al layered double hydroxides and related mixed oxides
Title	Vliv hydrotermálního zpracování na vlastnosti Ni-Al LDH a příslušných směsných oxidů
Author(s)	Kovanda, F. (CZ) Rojka, T. (CZ) Bezdička, Petr (UACH-T)_{SAI, RID, ORCID} Jirátová, Květa (UCHP-M)_{RID, ORCID, SAI} Obalová, L. (CZ) Pacultová, K. (CZ) Bastl, Zdeněk (UFCH-W)_{RID, ORCID} Grygar, Tomáš (UACH-T)
Source Title	Journal of Solid State Chemistry. - : Elsevier - ISSN 0022-4596 Roč. 182, č. 1 (2009), s. 27-36
Number of pages	10 s.
Language	eng - English
Country	US - United States
Keywords	layered double hydroxides ; hydrotalcite-like compounds ; thermal decomposition
Subject RIV	CA - Inorganic Chemistry
R&D Projects	GA104/07/1400 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z40320502 - UACH-T (2005-2011)
	AV0Z40720504 - UCHP-M (2005-2011)
	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000262546200004
DOI	10.1016/j.jssc.2008.09.014
Annotation	The Ni-Al layered double hydroxides (LDHs) with Ni/Al molar ratio of 2, 3, and 4 were prepared by coprecipitation and treated under hydrothermal conditions at 180 °C. Hydrothermal treatment increased significantly the crystallite size of coprecipitated samples. Gradual crystallization of NiO-like mixed oxide was observed at higher temperatures. Hydrothermal treatment improved thermal stability of the Ni2Al and Ni3Al LDHs but only a slight effect of hydrothermal treatment was observed with the Ni4Al sample. Hydrothermal aging of the LDHs resulted in decreasing content of the amorphous component and enhanced substitution of Al cations into NiO-like structure. The hydrothermally treated samples also exhibited a worse reducibility of Ni2+ components and an increase in pore size with increasing time of hydrothermal aging. The hydrothermal treatment of LDH precursor significantly improved the catalytic activity of Ni2Al mixed oxides in N2O decomposition.
Workplace	Institute of Inorganic Chemistry
Contact	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Year of Publishing	2009

Number of the records: 1