Evaluation of acidity of hierarchical zeolites using a potentiometric titration method

Shvets, O. V.; Kurmach, M. M.; Konysheva, K. M.; Lozovytska, O. I.; Shcherban, N. D.

doi:10.1016/j.mtchem.2024.101921

Evaluation of acidity of hierarchical zeolites using a potentiometric titration method

Journal Article · Thu Jan 25 23:00:00 EST 2024 · Materials Today Chemistry

DOI:https://doi.org/10.1016/j.mtchem.2024.101921· OSTI ID:2350761

^[1]; ^[2]; Konysheva, K. M. ^[2]; Lozovytska, O. I. ^[2]; ^[3]

L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, Kyiv (Ukraine); University of Massachusetts Amherst
L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, Kyiv (Ukraine)
L.V. Pisarzhevsky Institute of Physical Chemistry of the NAS of Ukraine, Kyiv (Ukraine); Åbo Akademi University (Finland)

The method of potentiometric titration and corresponding determination of pK_a of acid sites by the Gran method was applied for hierarchical zeolite materials. For hierarchical Al-, Ga- and B-silicate zeolites of MOR, BEA, MFI and MTW structural types with the morphology of aggregated nanosheets, nanorods or close to spherical nanoparticles, the distribution of acid sites by strength was determined. Furthermore, the dependence of the acidity spectrum (strength of acid sites) on the type of zeolite structure and the nature of an isomorphously substituted cation, on the one hand, and on the morphology of zeolite nanocrystals, on the other hand, was demonstrated.

View Accepted Manuscript (DOE)

Research Organization:: University of Massachusetts, Amherst, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)

Grant/Contract Number:: SC0021041

OSTI ID:: 2350761

Journal Information:: Materials Today Chemistry, Journal Name: Materials Today Chemistry Vol. 36; ISSN 2468-5194

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Acidity
BEA
Brønsted and Lewis acid sites
Hierarchical zeolites
MFI and MTW type
MOR
Potentiometric titration

Evaluation of acidity of hierarchical zeolites using a potentiometric titration method

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References (35)

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