Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating.
Sachse A, Grau-Atienza A, Jardim EO, Linares N, Thommes M, Garcia-Martinez J (2017)
Publication Type: Journal article, Original article
Subtype: other
Publication year: 2017
Journal
Publisher: American Chemical Society
Book Volume: 17
Pages Range: 4289-4305-4305
Journal Issue: 8
Abstract
Novel insights into the surfactant-templating process leading to the formation of tailored intracryst. mesoporosity in USY zeolite are presented in the light of the changes in the textural, morphol., and chem. properties of this zeolite produced during its treatment in a basic soln. of cetyltrimethylammonium bromide (CTAB). The inability of analogous surfactants with bulkier heads to produce mesoporosity suggests that individual CTAB mols. can actually enter the zeolite through its microporosity. Once inside, the surfactant mols. 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 anal. of ultramicrotomed samples by transmission electron microscopy evidenced the formation of uniform intracryst. mesoporosity throughout the entire crystals. In order to investigate an alternative method, namely, the dissoln. and reassembly of zeolites, this was performed in USY leading to the formation of composite materials, which are distinctly different from the zeolite with intracryst. 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. [on SciFinder(R)]
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APA:
Sachse, A., Grau-Atienza, A., Jardim, E.O., Linares, N., Thommes, M., & Garcia-Martinez, J. (2017). Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating. Crystal Growth and Design, 17(8), 4289-4305-4305. https://doi.org/10.1021/acs.cgd.7b00619
MLA:
Sachse, Alexander, et al. "Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating." Crystal Growth and Design 17.8 (2017): 4289-4305-4305.
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