Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating
| العنوان: | Development of Intracrystalline Mesoporosity in Zeolites through Surfactant-Templating |
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| المؤلفون: | Matthias Thommes, Aida Grau-Atienza, Alexander Sachse, Erika de Oliveira Jardim, Noemi Linares, Javier Garcia-Martinez |
| المساهمون: | Universidad de Alicante. Departamento de Química Inorgánica, Laboratorio de Nanotecnología Molecular (NANOMOL) |
| المصدر: | Crystal Growth & Design. 17:4289-4305 |
| بيانات النشر: | American Chemical Society (ACS), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Materials science, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Micelle, chemistry.chemical_compound, Pulmonary surfactant, Bromide, Molecule, General Materials Science, Zeolite, Dissolution, Química Inorgánica, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Intracrystalline mesoporosity, 0104 chemical sciences, chemistry, Chemical engineering, Transmission electron microscopy, Basic solution, Zeolites, Surfactant-templating, 0210 nano-technology |
| الوصف: | 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. Authors acknowledge the CAPITA project WAVES (EP7-NMP-266543) and Rive Technology for financial support. |
| تدمد: | 1528-7505 1528-7483 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3886961e92e72e6eeabfceb12e4d9deTest https://doi.org/10.1021/acs.cgd.7b00619Test |
| حقوق: | RESTRICTED |
| رقم الانضمام: | edsair.doi.dedup.....a3886961e92e72e6eeabfceb12e4d9de |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15287505 15287483 |
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