Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Unveiling the elusive role of tetraethyl orthosilicate hydrolysis in ionic-liquid-templated zeolite synthesis

Authors
Li, X.Li, T. -h.Zhou, W.Li, Y. -p.Sit, P. H. -L.Wu, Z.Curnow, O. J.Wu, K. C. -W.Choi, J.Yip, A. C. K.
Issue Date
3월-2022
Publisher
ELSEVIER SCI LTD
Keywords
Ionic liquids; TON; MFI; TEOS$hydrolysis; Zeolites
Citation
MATERIALS TODAY CHEMISTRY, v.23
Indexed
SCIE
SCOPUS
Journal Title
MATERIALS TODAY CHEMISTRY
Volume
23
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/141915
DOI
10.1016/j.mtchem.2021.100658
ISSN
2468-5194
Abstract
Despite previous reports showing that crystallization kinetics affects zeolite phase selectivity because zeolites are metastable species in their synthesis solution rather than thermodynamic end points, the critical kinetics-controlling parameter is yet to be determined. This work elucidated the effect of tet-raethyl orthosilicate (TEOS) hydrolysis before hydrothermal treatment on the final zeolite phase selec-tivity in the ionic liquid-templated synthesis of 10-membered ring zeolites (MFI-or TON-type zeolites). The results showed that the dissolved silica concentration in the synthesis solution, which is controlled by varying the TEOS hydrolysis temperature and addition rate, induced heterogeneous nuclear growth. Specifically, in 1-butyl-3-methylimidazolium ([BMIM]Br)-directed syntheses, the high and low concen-trations of dissolved silica species led to MFI and TON zeolite formation, respectively. The experimental results are supported by silica polymerization modeling using the Reaction Ensemble Monte Carlo method and theoretical calculations on composite building unit formation. The results are valuable for understanding the nucleation mechanism in zeolite crystallization. (c) 2021 Elsevier Ltd. All rights reserved.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Choi, Jung kyu photo

Choi, Jung kyu
공과대학 (화공생명공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE