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  Highly microporous monodisperse silica spheres synthesized by the Stöber process

Bazula, P., Arnal, P., Galeano Nunez, D. C., Zibrowius, B., Schmidt, W., & Schüth, F. (2014). Highly microporous monodisperse silica spheres synthesized by the Stöber process. Microporous and Mesoporous Materials, 200, 317-325. doi:10.1016/j.micromeso.2014.07.051.

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 Creators:
Bazula, Piotr1, 2, Author              
Arnal, Pablo2, 3, Author              
Galeano Nunez, Diana Carolina2, 4, Author              
Zibrowius, Bodo5, Author              
Schmidt, W.6, Author              
Schüth, Ferdi2, Author              
Affiliations:
1BASF Construction Solutions GmbH, D-83308 Trostberg, Germany., ou_persistent22              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
3Centro de Tecnología de Recursos Minerales y Cerámica, Camino Centenario y 506, CC 49 (B1897ZCA), M.B. Gonnet, La Plata, Argentina., ou_persistent22              
4BASF SE, Carl-Bosch-Straße 38, D-67056 Ludwigshafen, Germany., ou_persistent22              
5Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445623              
6Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445618              

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Free keywords: Silica; Spheres; High specific surface area; Thermal stability
 Abstract: Silica spheres that are prepared by the Stöber process are usually considered non-porous. Here we report on a slightly modified synthesis protocol that allows preparation of microporous Stöber particles. Successive treatment with water and alcohol at room temperature results in substantial reorganization of the silica within the Stöber particles. Hydrolysis of alkoxy groups as well as condensation and re-esterification of silanol groups upon re-immersion in alcohol are crucial for that process. As the result of the silica reorganization, micropore channels are formed within the particles. After a final washing with water to remove all alkoxy groups from the particles, pure microporous silica spheres are obtained. The total pore volumes of these materials are comparable to those of zeolitic materials.

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Language(s): eng - English
 Dates: 2014-08-092014
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.micromeso.2014.07.051
 Degree: -

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Title: Microporous and Mesoporous Materials
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 200 Sequence Number: - Start / End Page: 317 - 325 Identifier: ISSN: 1387-1811
CoNE: https://pure.mpg.de/cone/journals/resource/954926228401