Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating

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Título: Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating
Autor/es: Sachse, Alexander | Grau-Atienza, Aida | Jardim, Erika de Oliveira | Linares Pérez, Noemí | Thommes, Matthias | Garcia-Martinez, Javier
Grupo/s de investigación o GITE: Laboratorio de Nanotecnología Molecular (NANOMOL)
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Inorgánica
Palabras clave: Intracrystalline mesoporosity | Zeolites | Surfactant-templating
Área/s de conocimiento: Química Inorgánica
Fecha de publicación: 17-jul-2017
Editor: American Chemical Society
Cita bibliográfica: Crystal Growth & Design. 2017, 17(8): 4289-4305. doi:10.1021/acs.cgd.7b00619
Resumen: Novel insights into the surfactant-templating process leading to the formation of tailored intracrystalline mesoporosity in USY zeolite are presented in the light of the changes in the textural, morphological, and chemical properties of this zeolite produced during its treatment in a basic solution of cetyltrimethylammonium bromide (CTAB). The inability of analogous surfactants with bulkier heads to produce mesoporosity suggests that individual CTAB molecules can actually enter the zeolite through its microporosity. Once inside, the surfactant molecules self-assemble to produce the micelles responsible for the formation of mesoporosity causing the expansion of the zeolite crystals, as evidenced by He pycnometry measurements. The analysis of ultramicrotomed samples by transmission electron microscopy evidenced the formation of uniform intracrystalline mesoporosity throughout the entire crystals. In order to investigate an alternative method, namely, the dissolution and reassembly of zeolites, this was performed in USY leading to the formation of composite materials, which are distinctly different from the zeolite with intracrystalline mesoporosity obtained by surfactant-templating. Finally, it was proved that the presence of mesoporosity in the initial zeolite is not needed for the surfactant-templating to occur. This was verified by surfactant-templating of a NaY zeolite, which does not present the large mesopores found in USY.
Patrocinador/es: Authors acknowledge the CAPITA project WAVES (EP7-NMP-266543) and Rive Technology for financial support.
URI: http://hdl.handle.net/10045/69076
ISSN: 1528-7483 (Print) | 1528-7505 (Online)
DOI: 10.1021/acs.cgd.7b00619
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2017 American Chemical Society
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1021/acs.cgd.7b00619
Aparece en las colecciones:INV - NANOMOL - Artículos de Revistas

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