Issue 16, 2009
From the journal:

Physical Chemistry Chemical Physics

Accelerated generation of intracrystalline mesoporosity in zeolites by microwave-mediated desilication

Sònia Abellóa  and  Javier Pérez-Ramírez*ab  

* Corresponding authors

a Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, Tarragona, Spain
E-mail: jperez@iciq.es
Fax: +34 (0)977 920 224
Tel: +34 (0)977 920 236

b Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, Barcelona, Spain

Abstract

Microwave-mediated desilication was successfully used to fabricate hierarchically structured zeolites combining micro- and mesoporosity. The application of microwave radiation during alkaline treatment of commercial ZSM-5 samples in aqueous NaOH solution at 338 K spectacularly accelerates the development of intracrystalline mesoporosity compared to the standard treatment (conventional heating). This is attributed to the more efficient transfer of thermal heating to the zeolite solution, thus enhancing the rate of silicon extraction. Very short exposure times (3–5 min) resulted in hierarchical zeolites with mesopore surface areas up to 230 m2 g−1 and pores centred around 10 nm, while preserving the crystallinity of the parent sample. The benefits of this treatment can be extrapolated to other zeolite structures.

Graphical abstract: Accelerated generation of intracrystalline mesoporosity in zeolites by microwave-mediated desilication

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Article information

DOI
https://doi.org/10.1039/B819543A
Article type
Paper
Submitted
05 Nov 2008
Accepted
04 Feb 2009
First published
27 Feb 2009

Phys. Chem. Chem. Phys., 2009,11, 2959-2963

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Accelerated generation of intracrystalline mesoporosity in zeolites by microwave-mediated desilication

S. Abelló and J. Pérez-Ramírez, Phys. Chem. Chem. Phys., 2009, 11, 2959 DOI: 10.1039/B819543A

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