TY - JOUR
T1 - Evaluation of acidity of hierarchical zeolites using a potentiometric titration method
AU - Shvets, O. V.
AU - Kurmach, M. M.
AU - Konysheva, K. M.
AU - Lozovytska, O. I.
AU - Shcherban, N. D.
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/3
Y1 - 2024/3
N2 - The method of potentiometric titration and corresponding determination of pKa 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. 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.
AB - The method of potentiometric titration and corresponding determination of pKa 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. 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.
KW - Acidity
KW - BEA
KW - Brønsted and Lewis acid sites
KW - Hierarchical zeolites
KW - MFI and MTW type
KW - MOR
KW - Potentiometric titration
UR - http://www.scopus.com/inward/record.url?scp=85183451162&partnerID=8YFLogxK
U2 - 10.1016/j.mtchem.2024.101921
DO - 10.1016/j.mtchem.2024.101921
M3 - Article
AN - SCOPUS:85183451162
SN - 2468-5194
VL - 36
JO - Materials Today Chemistry
JF - Materials Today Chemistry
M1 - 101921
ER -