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  Multidiagnostic analysis of silicate speciation in clear solutions/sols for zeolite synthesis

Castro, M., Haouas, M., Taulelle, F., Lim, I., Breynaert, E., Brabants, G., et al. (2014). Multidiagnostic analysis of silicate speciation in clear solutions/sols for zeolite synthesis. Microporous and Mesoporous Materials, 189, 158-162. doi:10.1016/j.micromeso.2013.08.027.

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 Creators:
Castro, Maria1, Author              
Haouas , M.2, Author
Taulelle, F.2, Author
Lim, Ivy1, Author              
Breynaert , E.3, Author
Brabants, G.3, Author
Kirschhock, C.E.A.3, Author
Schmidt, W.4, Author              
Affiliations:
1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
2Institut Lavoisier de Versailles, University of Versailles, France, ou_persistent22              
3Center for Surface Chemistry and Catalysis, KU Leuven, Belgium, ou_persistent22              
4Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445618              

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Free keywords: Zeolite beta; Nanoparticles; Nuclear magnetic resonance; Mass spectrometry; Small angle X-ray scattering
 Abstract: The formation of zeolites in presence of tetraalkylammonium cations from so-called clear solutions using silicon alkoxides is a highly complex process which challenges experimental chemistry. Most clear solutions are better described as clear sols as they contain nanosized silicate particles, which are formed during hydrolysis of the Si source before self-assembly into the zeolite framework. This process spans multiple time- and length-scales and only a combination of different analysis methods allows revelation of molecular level zeolite formation mechanisms. On the example of the early stages of the formation of zeolite beta from clear solutions/sols the different windows of observation of liquid-state 29Si and 27Al nuclear magnetic resonance (NMR) spectroscopy, small angle X-ray scattering (SAXS), dynamic light scattering (DLS) and mass spectrometry (MS) are demonstrated. Each diagnostic means by itself needs to be carefully assessed for its window of temporal and spatial resolution which can be achieved by exploiting the overlapping information available from their combination.

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Language(s): eng - English
 Dates: 2013-09-032014-05-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.micromeso.2013.08.027
 Degree: -

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Title: Microporous and Mesoporous Materials
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 189 Sequence Number: - Start / End Page: 158 - 162 Identifier: ISSN: 1387-1811
CoNE: https://pure.mpg.de/cone/journals/resource/954926228401