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Open AccessArticle

Effect of Both the Phase Composition and Modification Methods on Structural-Adsorption Parameters of Dispersed Silicas

1
Faculty of Chemistry and Pharmacy, Odessa I.I. Mechnikov National University, 2, Dvoryanska Street, 65082 Odessa, Ukraine
2
Institute of Monocrystals of National Academy of Sciences of Ukraine, 60, Nauki Avenue, 61072 Kharkiv, Ukraine
*
Author to whom correspondence should be addressed.
Colloids Interfaces 2019, 3(1), 1; https://doi.org/10.3390/colloids3010001
Received: 28 November 2018 / Revised: 18 December 2018 / Accepted: 19 December 2018 / Published: 21 December 2018
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. View Full-Text
Keywords: Ukrainian tripolis; modification; structural-adsorption parameters; XRD method; water vapor adsorption-desorption isotherms Ukrainian tripolis; modification; structural-adsorption parameters; XRD method; water vapor adsorption-desorption isotherms
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Rakitskaya, T.; Kiose, T.; Golubchik, K.; Baumer, V.; Volkova, V. Effect of Both the Phase Composition and Modification Methods on Structural-Adsorption Parameters of Dispersed Silicas. Colloids Interfaces 2019, 3, 1.

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