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Physicochemical cha...
Physicochemical characterization of silicalite-1 nanophase material
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- Ravishankar, Raman (author)
- Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium
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- Kirschhock, Christine (author)
- Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium
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- Schoeman, Brian J. (author)
- Luleå tekniska universitet
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- Vanoppen, Peter (author)
- Laboratorium Moleculaire Dynamica en Spectroscopie, K.U. Leuven, B-3001, Heverlee, Belgium
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- Grobet, Piet J. (author)
- Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium
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- Storck, Sebastian (author)
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
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- Maier, William F. (author)
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
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- Martens, Johan A. (author)
- Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium
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- De Schryver, Frans C. (author)
- Laboratorium Moleculaire Dynamica en Spectroscopie, K.U. Leuven, B-3001, Heverlee, Belgium
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- Jacobs, Pierre A. (author)
- Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, K.U. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium
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Luleå tekniska universitet Departement Interfasechemie, Centrum voor Oppervlaktechemie en Katalyse, KU. Leuven, Kard. Mercierlaan 92, B-3001 Heverlee, Belgium (creator_code:org_t)
- 1998-03-20
- 1998
- Swedish.
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In: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 102:15, s. 2633-2639
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- A silicalite-1 nanophase material with an elementary particle size of 18-100 nm is synthesized from clear solution and isolated and purified using supercentrifugation. The nanopowder is characterized in detail using scanning electron microscopy, high-resolution transmission electron microscopy, attenuated force microscopy, 29Si magic angle spinning NMR, 13C cross polarization magic angle spinning NMR, X-ray diffraction, dinitrogen physisorption, and thermogravimetric analysis and compared with micrometer-sized silicalite-1. The nanosized and micrometer-sized materials have many common properties including the refined structure and the nature and concentrations of tetrapropylammonium species incorporated during the synthesis. Unique properties of the nanophase are a splitting of the characteristic framework vibration at 550 cm-1 into a doublet at 555 and 570 cm-1, a high concentration of defect sites, and a strain in the crystallites along the "a" crystallographic direction. The nanophase exhibits a two-stage dinitrogen physisorption in the low-pressure region, ascribed to adsorptions in micropores created by the stacking of the nanoparticles in addition to adsorptions in the intracrystalline micropores.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- Chemical Technology
- Kemisk teknologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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Ravishankar, Ram ...
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Kirschhock, Chri ...
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Schoeman, Brian ...
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Vanoppen, Peter
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Grobet, Piet J.
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Storck, Sebastia ...
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Maier, William F ...
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Martens, Johan A ...
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De Schryver, Fra ...
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Jacobs, Pierre A ...
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Luleå University of Technology