The Energetics of Surfactant‐Templating of Zeolites

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Title: The Energetics of Surfactant‐Templating of Zeolites
Authors: Linares Pérez, Noemí | Jardim, Erika de Oliveira | Sachse, Alexander | Serrano, Elena | Garcia-Martinez, Javier
Research Group/s: Laboratorio de Nanotecnología Molecular (NANOMOL)
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica
Keywords: Apparent activation energy | Kinetics | Mesoporous zeolites | Surfactant-templating | Synchrotron characterization
Knowledge Area: Química Inorgánica
Issue Date: 9-Jul-2018
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Citation: Angewandte Chemie International Edition. 2018, 57(28): 8724-8728. doi:10.1002/anie.201803759
Abstract: Mesoporosity can be conveniently introduced into zeolites by treating them in basic surfactant solutions. The apparent activation energy involved in the formation of mesopores in USY by surfactant‐templating was determined using a combination of in situ synchrotron X‐ray diffraction and ex situ gas adsorption. Additionally, techniques such as pH measurement and thermogravimetry/differential thermal analysis were employed to determine OH− evolution and cetyltrimethylammonium ion (CTA+) uptake during the development of mesoporosity, thereby providing information about the different steps involved. The combination of both in situ and ex situ techniques has allowed determination of the apparent activation energies of the different processes involved in the mesostructuring of USY zeolites for the first time. Apparent activation energies are of the same order of magnitude (30–65 kJ mol−1) as those involved in the crystallization of zeolites. Hence, important mechanistic insight into the surfactant‐templating method was obtained.
Sponsor: This work was supported by the Spanish MINECO (PCIN-2013-164) and the EC through the ERA-NET CAPITA(AEI/FEDER, project WAVES, EP7-NMP-266543) and the ALBA Synchrotron (refs. 2016021622 and 2016021729). E.S. thanks the Spanish MINECO and AEI/FEDER, UE (CTQ2015-74494-JIN). E.S. and N.L. acknowledge the University of Alicante support (UATALENTO16-03 and UATALENTO17-05, respectively).
ISSN: 1433-7851 (Print) | 1521-3773 (Online)
DOI: 10.1002/anie.201803759
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Peer Review: si
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Appears in Collections:INV - NANOMOL - Artículos de Revistas

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