Title :

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

Author(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]

Journal title :

Journal of Physical Chemistry B

Abbreviated title :

J. Phys. Chem. B

Volume number :

110

Pages :

20369-20378

Publication date :

2006-09-23

ISSN :

1520-6106

HAL domain(s) :

Chimie

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

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

Research team(s) :

Modélisation et spectroscopies (MODSPEC)

Submission date :

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