UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Structural investigations in pure-silica and Al-ZSM-12 with MTEA or TEA cations

Počkaj, M; Meden, A; Zabukovec Logar, N; Rangus, M; Mali, G; Lezcano-Gonzalez, I; Beale, AM; (2017) Structural investigations in pure-silica and Al-ZSM-12 with MTEA or TEA cations. Microporous and Mesoporous Materials , 263 pp. 236-242. 10.1016/j.micromeso.2017.12.015. Green open access

[img]
Preview
Text
manuscript_jul2017_AMBEdit_ILG.pdf - Accepted version

Download (1MB) | Preview

Abstract

Two different quaternary ammonium cations, methyltriethyl- (MTEA) and tetraethylammonium cations (TEA) were used as templates in the synthesis of pure-silica as well as aluminosilicate ZSM-12 (MTW-type) frameworks. The distribution of the template cations in the 12-membered rings channels in the 1-dimensional framework topology was studied; thus the as-prepared products were characterized by means of X-ray powder diffraction, Raman, transmission FTIR, solid-state NMR spectroscopy, thermogravimetric and elemental analyses and SEM. It was shown that in pure-silica (PS) ZSM-12, TEA cations are well ordered - a superstructure with three-times longer b edge (in comparison to unit cell of empty framework) along the channel is formed, which can be seen by virtue of a few additional peaks in the X-ray powder pattern. Herein we describe that its aluminosilicate counterpart with TEA also contains ordered TEA cations and is isostructural to PS-ZSM-12. Conversely, in both pure-silica and aluminosilicate ZSM-12 frameworks with MTEA, the cations are disordered and no superstructure is formed.

Type: Article
Title: Structural investigations in pure-silica and Al-ZSM-12 with MTEA or TEA cations
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.micromeso.2017.12.015
Publisher version: https://doi.org/10.1016/j.micromeso.2017.12.015
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: ZSM-12, TEA, MTEA, Superstructure, X-ray powder diffraction
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10047826
Downloads since deposit
38Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item