Simultaneous adsorption of anionic and cationic species on UiO-66 and MIL-125 MOFs: Mechanisms &amp; selectivity

Palhares, Hugo G.; Andrade, Pedro; Moissette, Alain; Volkringer, Christophe; Loiseau, Thierry; Houmard, Manuel; Nunes, Eduardo H.M.

Type de document :

Article dans une revue scientifique

DOI :

10.1016/j.micromeso.2024.113010

URL permanente :

http://hdl.handle.net/20.500.12210/105138

Titre :

Simultaneous adsorption of anionic and cationic species on UiO-66 and MIL-125 MOFs: Mechanisms & selectivity

Auteur(s) :

Palhares, Hugo G. [Auteur]
Departamento de Química, Universidade Federal de Minas Gerais
Andrade, Pedro [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Moissette, Alain [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Volkringer, Christophe [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Loiseau, Thierry [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Houmard, Manuel [Auteur]
Departamento de Química, Universidade Federal de Minas Gerais
Nunes, Eduardo H.M. [Auteur]
Departamento de Química, Universidade Federal de Minas Gerais

Titre de la revue :

Microporous and Mesoporous Materials

Nom court de la revue :

Microporous and Mesoporous Materials

Pagination :

113010

Éditeur :

Elsevier BV

Date de publication :

2024-01

ISSN :

1387-1811

Discipline(s) HAL :

Chimie/Chimie inorganique

Résumé en anglais : [en]

Metal-organic frameworks (MOFs) have attractive properties, including regular pore structure, high specific surface area, tunable surface properties, and abundant active sites. Such properties have boosted their recent ...
Lire la suite >Metal-organic frameworks (MOFs) have attractive properties, including regular pore structure, high specific surface area, tunable surface properties, and abundant active sites. Such properties have boosted their recent development in many fields, including water treatment. In this study, MOFs composed of tetravalent metals (Ti4+ and Zr4+) and dicarboxylate linker (terephthalate – BDC) were modified using surface functionalization and/or pore structure through defect engineering to enhance adsorption properties. It has been shown that the Ti-containing materials (MIL-125) show a greater affinity for cationic species, while the Zr-containing samples (UiO-66) have a higher affinity for anionic species. Surface charge and electrostatic interactions could account for such a difference in adsorption properties. Zeta potential measurements showed that MIL-125 has a more negative surface charge for both non-functionalized and amino-functionalized versions, which favors the interaction with cationic molecules. On the other hand, UiO-66 has a more positive surface, which facilitates interactions with anionic molecules. Within each MOF family, the non-functionalized structures emerged as the best-performing materials. Specifically, MIL-125(H) and UiO-66(H)_5eq, with 5eq denoting the amount of H2O added during synthesis, showed superior performance. Furthermore, by performing simultaneous adsorption experiments with anionic and cationic contaminants, it was found that the adsorption of the anionic dye acid orange 7 (AO7) onto the UiO-66 framework is primarily based on specific interactions between the sulfonic group (-SO3-) within the AO7 molecule and the inorganic core Zr6O4(OH)4 of UiO-66. The interaction between MIL-125 and the cationic dye methylene blue (MB) was found to be more delocalized, based on electrostatic and π-π interactions between the benzene domains. Finally, except for MIL-125(H), all the tested MOFs showed high stability in water and in the adsorption process. The higher stability of UiO-66 over MIL-125 materials can be attributed to steric effects and lower metal electronegativity. Compared to MIL-125(H), the higher stability of MIL-125(NH2) is probably related to the formation of intramolecular hydrogen bonds.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

Équipe(s) de recherche :

Matériaux hybrides (MATHYB)

Date de dépôt :

2024-01-30T14:45:11Z
2024-01-31T08:24:31Z

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Historique des modifications

Numéro de version	Lien	Date de modification
3	20.500.12210/105138	2024-02-12T08:47:05Z
2	20.500.12210/105138.2*	2024-01-31T08:20:08Z
1	20.500.12210/105138.1	2024-01-30T14:45:11Z

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Simultaneous adsorption of anionic and ...

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Simultaneous adsorption of anionic and ... BibTeX CSV Excel RIS

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Simultaneous adsorption of anionic and ...

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