Enhancement of growth of MOF MIL-68(Al) thin films on porous alumina tubes using different linking agents

Perea-Cachero, A. (Universidad de Zaragoza) ; Calvo, P. ; Romero, E. (Universidad de Zaragoza) ; Téllez, C. (Universidad de Zaragoza) ; Coronas, J. (Universidad de Zaragoza)

Resumen: The preparation of MIL-68(Al) films on the inner surface of alumina tubes is reported. As the direct deposition of the MOF on bare alumina gives poor adhesion results, three different linking agents are employed to achieve a good MOF–support interaction. Colloidal silica LUDOX®, zeolite silicalite-1, and natural polysaccharide chitosan are chosen as binders, because they contain potential functional groups (hydroxy, amino, ether), which can establish hydrogen bonds. While colloidal silica leads to noncontinuous MOF layers, silicalite-1 and chitosan give rise to uniform and well-anchored films, as confirmed by the different characterization techniques used to study the MOF layer. Single-gas permeation experiments are carried out to determine the quality and ideal efficiency of the membranes prepared with silicalite-1 and chitosan. The results for the MIL-68(Al)/silicalite-1 membranes evidence the existence of macrodefects. However, no cracks are found when chitosan is used as a linking agent, and the gas flow through the MIL-68(Al)/chitosan membranes clearly follows Knudsen diffusion.

Idioma: Inglés

DOI: 10.1002/ejic.201700302

Año: 2017

Publicado en: European Journal of Inorganic Chemistry 19 (2017), 2532-2540
ISSN: 1434-1948

Factor impacto JCR: 2.507 (2017)

Categ. JCR: CHEMISTRY, INORGANIC & NUCLEAR rank: 14 / 45 = 0.311 (2017) - Q2 - T1

Factor impacto SCIMAGO: 0.828 - Inorganic Chemistry (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/T05
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2013-40556-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-77290-R

Tipo y forma: Article (PostPrint)

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