Abstract
Barium aluminate BaAl2O4 of spinel structure was prepared by hydrothermal treatment at 150°С of a suspension of a gibbsite thermal activation product in an aqueous barium nitrate solution, followed by heat treatment of the precursors obtained. The product composition was studied by X-ray diffraction, thermal, microscopic, adsorption, and chemical analysis methods. Heat treatment of the hydrothermal reaction products at 850°С leads to the formation of single-phase barium aluminate BaAl2O4 with the specific surface area of ~50 m2 g–1 in the form of disk-shaped porous particles forming aggregates. The surface of BaAl2O4 particles is enriched in barium cations, which are relatively uniformly distributed over particles. The procedure allows reduction of the amount of the starting reactants and of the number of preparation steps, and also minimization or complete exclusion of the wash water formation.
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The study was performed within the framework of the government assignment for the Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences (grant no. 0239-2021-0004).
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A.V. Zhuzhgov and V.Yu. Kruglyakov: development of the experimental procedure and participation in the sample preparation, analysis of the results, and manuscript preparation; E.A. Suprun: electron microscopic examination of the samples; L.A. Isupova: significant contribution to the idea and design of the study, to the data interpretation, and to the final manuscript preparation.
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Translated from Zhurnal Prikladnoi Khimii, No. 4, pp. 450–457, March, 2022 https://doi.org/10.31857/S0044461822040053
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Zhuzhgov, A.V., Kruglyakov, V.Y., Suprun, E.A. et al. Synthesis of Barium Aluminate of Disk-Shaped Morphology Using the Product of Centrifugal Thermal Activation of Gibbsite. Russ J Appl Chem 95, 512–518 (2022). https://doi.org/10.1134/S1070427222040061
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DOI: https://doi.org/10.1134/S1070427222040061