Titre :

Alkaline treatment of iron-containing MFI zeolites. Influence on mesoporosity development and iron speciation

Auteur(s) :

Groen, Johan C. [Auteur]
Maldonado, Lluís [Auteur]
Berrier, Elise [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Bruckner, Angelika [Auteur]
Moulijn, Jacob A. [Auteur]
Perez-Ramirez, Javier [Auteur]

Titre de la revue :

Journal of Physical Chemistry B

Nom court de la revue :

J. Phys. Chem. B

Numéro :

110

Pagination :

20369-20378

Date de publication :

2006-09-23

ISSN :

1520-6106

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

The effects of alkaline treatment on the mesoporosity development and iron speciation in Fe−MFI zeolites have been investigated. To this end, a variety of samples derived from different synthetic routes and having distinct ...
Lire la suite >The effects of alkaline treatment on the mesoporosity development and iron speciation in Fe−MFI zeolites have been investigated. To this end, a variety of samples derived from different synthetic routes and having distinct Si/Al ratios and Fe content were treated in NaOH solutions and characterized by N2 adsorption, SEM, TEM, UV/vis spectroscopy, and EPR. The alkaline treatment induces a significant intracrystalline mesoporosity development by framework silicon extraction and promotes disintegration of oligomeric iron species. Iron in framework positions has shown to provoke mesopore formation, whereas nonframework iron species suppresses silicon leaching and lowers the extent of extra porosity.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Modélisation et spectroscopies (MODSPEC)

Date de dépôt :

2023-05-30T18:24:32Z
2024-04-26T11:08:26Z