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A comparative study of perfluorinated and non-fluorinated UiO-67 in gas adsorption Full article

Journal Journal of Porous Materials
ISSN: 1573-4854
Output data Year: 2020, Volume: 27, Number: 6, Pages: 1773-1782 Pages count : 10 DOI: 10.1007/s10934-020-00941-w
Authors Cheplakova Anastasia M. 1,2 , Kovalenko Konstantin A. 1,2 , Vinogradov Andrey S. 3 , Karpov Victor M. 3 , Platonov Vyacheslav E. 3 , Fedin Vladimir P. 1,2
Affiliations
1 Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad. Lavrentiev Av., 630090, Novosibirsk, Russian Federation
2 Novosibirsk State University, 2 Pirogova St., 630090, Novosibirsk, Russian Federation
3 N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Akad. Lavrentiev Av., 630090, Novosibirsk, Russian Federation

Abstract: Metal–organic frameworks (MOFs) are perspective materials for application in gas storage, separation and purification. The perfluorination of organic linker is expected to change significantly the surface properties of a MOF and therefore, the adsorption behaviour due to small size, high electronegativity and polarizing ability of fluorine atoms. To reveal the effect of extensive linker fluorination on the properties of MOF, we have developed new method of synthesis of Zr6 MOF based on perfluorinated biphenyl-4,4-dicarboxylate of UiO-67 structure denoted as UiO-67-F8. N2 adsorption at 77 K confirms that UiO-67-F8 is a microporous solid with the BET surface area of 1629 m2 g-1 which is the best value for perfluorinated MOFs. Extensive investigations of properties of UiO-67-F8 reveal that hydrophobicity and hydrolytic stability are similar to the parent UiO-67. The low-pressure gas adsorption gravimetric uptakes (N2, CO2, CH4, C2-hydrocarbons) at 273 and 298 K are slightly lower for UiO-67-F8 due to larger density and lower pore volume. The results obtained show that the difference in IAST selectivity factors for UiO-67-F8 and UiO-67 are negligible and both non-fluorinated and perfluorinated surfaces are almost identical for adsorption of the most frequently studied gases.
Cite: Cheplakova A.M. , Kovalenko K.A. , Vinogradov A.S. , Karpov V.M. , Platonov V.E. , Fedin V.P.
A comparative study of perfluorinated and non-fluorinated UiO-67 in gas adsorption
Journal of Porous Materials. 2020. V.27. N6. P.1773-1782. DOI: 10.1007/s10934-020-00941-w WOS OpenAlex
Identifiers:
Web of science: WOS:000557219300001
OpenAlex: W3047661379
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OpenAlex 21
Web of science 18
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