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Title: Effect of Both the Phase Composition and Modification Methods on Structural-Adsorption Parameters of Dispersed Silicas
Authors: Rakitskaya, Tatiana L.
Kiose, Tetiana O.
Golubchik, Hrystyna O.
Baumer, Viacheslav
Volkova, Vitaliya Ya.
Ракитська, Тетяна Леонідівна
Кіосе, Тетяна Олександрівна
Голубчик, Христина Олегівна
Волкова, Віталія Яківна
Ракитская, Татьяна Леонидовна
Киосе, Татьяна Александровна
Голубчик, Кристина Олеговна
Волкова, Виталия Яковлевна
Citation: Colloids and Interfaces
Issue Date: 2019
Keywords: Ukrainian tripolis
structural-adsorption parameters
XRD method
water vapor adsorption-desorption isotherms
Series/Report no.: ;Vol. 3, Is. 1.
Abstract: Tripoli from two Ukrainian deposits was studied in its natural and modified forms. The investigation of natural and modified tripoli involves the identification of their phase compositions through X-ray diffraction and the analysis of their water vapor adsorption-desorption isotherms. The obtained results are evidence of changes in the structural-adsorption parameters of tripoli as a result of modification. Their treatment in boiling water or acid causes apparent alterations of contents of the main phases and sizes of their crystallites, whereas their calcination causes not only the dehydroxylation of surfaces and the agglomeration of phases, but even phase transformation in the case of carbonate tripoli. After analyzing water vapor adsorption-desorption isotherms of natural and modified tripolis, some correlations between their adsorption parameters, phase compositions, main phase contents and crystallite sizes have been found.
DOI: 10.3390/colloids3010001
Appears in Collections:Статті та доповіді ФХФ

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