Zeolite@Metal-organic framework core-shell synthesized from the aluminum of the zeolite with accessible internal surface for CO2 adsorption

Güemes, Lucas (Universidad de Zaragoza) ; Navarro, Marta ; Cacho-Bailo, Fernando ; Jaimes-Paez, Cristian D. ; Cazorla-Amorós, Diego ; Téllez, Carlos (Universidad de Zaragoza) ; Coronas, Joaquín (Universidad de Zaragoza)

Resumen: Combining the rigid microporosity of zeolites with the more versatile structures of metal–organic frameworks (MOFs) seeks to obtain a synergistic effect of both materials. Starting from a low cost and industrially produced zeolite, as it is zeolite NaA (with the LTA type structure), we show that it is possible to crystallize a MOF as shell onto it by only using an aqueous solution of terephthalic acid (H2BDC). Unlike other zeolite-MOF hybrids reported in the literature, the crystallized MOF only uses the aluminum from the zeolite and may share in turn some aluminum atoms with the inorganic zeolite core, therefore it consists solely of zeolitic Al and BDC. Depending on the pretreatment of the zeolite and the synthesis conditions (pH, time, linker ratio), the crystalline zeolite core is maintained or converted into an amorphous aluminosilicate. Thus, it is possible to retain a part of the adsorption properties of the parent zeolite without degrading its structure. The resulting core–shell material, designated as LTA@Al-BDC, combines the zeolite microporosity and molecular sieving properties with the MOF that crystallizes as high aspect ratio sheets which, together with its hydrophobicity, favors the contact with polymeric materials. In addition, being zeolite 4A (NaA) affinity towards CO2 been probed, the resulting LTA@Al-BDC material constitutes a prominent candidate towards CO2 separation.

Idioma: Inglés

DOI: 10.1016/j.cej.2025.164314

Año: 2025

Publicado en: Chemical Engineering Journal 518 (2025), 164314 [16 pp.]
ISSN: 1385-8947

Financiación: info:eu-repo/grantAgreement/ES/DGA/T68-23R
Financiación: info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S
Financiación: info:eu-repo/grantAgreement/ES/MICIU/PID2021-123079OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICIU/PID2022-138582OB-I00

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)