CaltechAUTHORS
  A Caltech Library Service

SAXS and USAXS Investigation on Nanometer-Scaled Precursors in Organic-Mediated Zeolite Crystallization from Gelating Systems

de Moor, Peter-Paul E. A. and Beelen, Theo P. M. and van Santen, Rutger A. and Tsuji, Katsuyuki and Davis, Mark E. (1999) SAXS and USAXS Investigation on Nanometer-Scaled Precursors in Organic-Mediated Zeolite Crystallization from Gelating Systems. Chemistry of Materials, 11 (1). pp. 36-43. ISSN 0897-4756. https://resolver.caltech.edu/CaltechAUTHORS:20171129-153606749

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20171129-153606749

Abstract

The formation of precursor particles in the crystallization of zeolites from gelating systems has been studied using X-ray scattering at small angles. The crystallization of Si−MFI using trimethylene-bis(N-hexyl, N-methyl-piperidinium) as the structure-directing agent shows the formation of two categories of precursors:  gel particles and nanometer-scaled primary units. The size of the primary units for the crystallization of Si−MFI is found to be 2.8 nm both for gelating and nongelating systems using different structure-directing agents. Zeolites Si−BEA and Si−MTW have been prepared using the same organic (trimethylene-bis(N-benzyl, N-methyl-piperidinium)) at different concentrations. Primary units with a size of 2.6 nm are found to be present in the synthesis of Si−BEA, while their size is 1.5 nm in the synthesis mixture directing to Si−MTW. Our data suggest that the nanometer-scaled primary units are specific for the zeolite topology formed.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1021/cm9807079DOIArticle
http://pubs.acs.org/doi/abs/10.1021/cm9807079PublisherArticle
ORCID:
AuthorORCID
Davis, Mark E.0000-0001-8294-1477
Additional Information:© 1999 American Chemical Society. Received March 25, 1998. Revised Manuscript Received October 14, 1998. Publication Date (Web): December 23, 1998. The SAXS/WAXS experiments were performed by an EPSRC grant at the Daresbury Synchrotron Radiation Source, where good help was provided by Dr. B. U. Komanschek. USAXS measurements were performed at the European Synchrotron Radiation Facility under Grants SC-138 and SC-202. We thank Dr. O. Diat for installing and perfectly aligning the Bonse-Hart setup. Dr. P. J. Kooyman of the National Centre for High Resolution Electron Microscopy, Delft University of Technology, Delft, The Netherlands, is acknowledged for performing the electron microscopy investigations. The work at CalTech was partially supported by the Chevron Research and Technology Company.
Funders:
Funding AgencyGrant Number
Engineering and Physical Sciences Research Council (EPSRC)UNSPECIFIED
European Synchrotron Radiation FacilitySC-138
European Synchrotron Radiation FacilitySC-202
Chevron Research and Technology CompanyUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20171129-153606749
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171129-153606749
Official Citation:SAXS and USAXS Investigation on Nanometer-Scaled Precursors in Organic-Mediated Zeolite Crystallization from Gelating Systems. Peter-Paul E. A. de Moor, Theo P. M. Beelen, Rutger A. van Santen, Katsuyuki Tsuji and Mark E. Davis. Chemistry of Materials 1999 11 (1), 36-43. DOI: 10.1021/cm9807079
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83576
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Nov 2017 23:41
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page