Abstract: Hexaaluminates SrAl12O19, BaAl12O19 and LaAl11O18 were prepared by co-precipitation of soluble nitrates of Sr, Ba, or La and Al using NH4HCO3 as a precipitating agent with subsequent calcination at 700–1400°C. The samples were characterized by adsorption methods, thermal analysis (TA and DTG), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy of adsorbed probe molecules (CO and CDCl3). It was shown that calcination at 1200°C resulted in the formation of single-phase hexaaluminates in all the samples except for LaAl11O18, where an additional phase was found. The specific surface area of the samples was obtained in the range 16–22 m2/g. After the treatment at comparable conditions, the total concentrations of both surface Lewis acid sites and basic sites were found to increase in the series: BaAl12O19 < SrAl12O19 < LaAl11O18. However, the strongest basic sites were detected on the surface of BaAl12O19.

Cite: Bukhtiyarova M.V. , Ivanova A.S. , Plyasova L.M. , Litvak G.S. , Budneva A.A. , Paukshtis E.A.
Structure and Acid-Base Properties of Hexaaluminates
Reaction Kinetics and Catalysis Letters. 2008. V.93. N2. P.375-387. DOI: 10.1007/s11144-008-5300-z WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Feb 19, 2008
Accepted:	Feb 21, 2008
Published print:	Apr 1, 2008
Published online:	Nov 27, 2008

Identifiers:

Web of science:	WOS:000255003000024
Scopus:	2-s2.0-57249086443
Elibrary:	13581897
Chemical Abstracts:	2008:561955
Chemical Abstracts (print):	150:549003
OpenAlex:	W2039716260

Citing:

DB	Citing
Web of science	7
Scopus	7
Elibrary	7
OpenAlex	11

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