Synthesis of fully dehydrated partially Cs(+)-exchanged zeolite Y (FAU, Si/Al=1.56), vertical bar Cs(45)Na(30) vertical bar [Si(117)Al(75)O(384)]-FAU and its single-crystal structure

Seo, Sung Man, Kim, Ghyung Hwa, Lee, Seok Hee, Bae, Jun-seok and Lim, Woo Taik (2009) Synthesis of fully dehydrated partially Cs(+)-exchanged zeolite Y (FAU, Si/Al=1.56), vertical bar Cs(45)Na(30) vertical bar [Si(117)Al(75)O(384)]-FAU and its single-crystal structure. Bulletin of the Korean Chemical Society, 30 6: 1285-1292. doi:10.5012/bkcs.2009.30.6.1285


Author Seo, Sung Man
Kim, Ghyung Hwa
Lee, Seok Hee
Bae, Jun-seok
Lim, Woo Taik
Title Synthesis of fully dehydrated partially Cs(+)-exchanged zeolite Y (FAU, Si/Al=1.56), vertical bar Cs(45)Na(30) vertical bar [Si(117)Al(75)O(384)]-FAU and its single-crystal structure
Formatted title
Synthesis of fully dehydrated partially Cs+-exchanged zeolite Y (FAU, Si/Al = 1.56), |Cs45Na30|[Si117Al75O384]-FAU and its single-crystal structure
Journal name Bulletin of the Korean Chemical Society   Check publisher's open access policy
ISSN 0253-2964
1225-0058
1229-5949
Publication date 2009-06-01
Year available 2009
Sub-type Article (original research)
DOI 10.5012/bkcs.2009.30.6.1285
Open Access Status DOI
Volume 30
Issue 6
Start page 1285
End page 1292
Total pages 8
Editor Yoon Sup Lee
Place of publication Seongbuk-gu, Seoul, Korea
Publisher Korean Chemical Society
Collection year 2010
Language eng
Subject 030306 Synthesis of Materials
850602 Energy Storage (excl. Hydrogen)
C1
Formatted abstract
Large single crystals of zeolite, |Na75|[Si117Al75O384]-FAU (Na-Y, Si/Al = 1.56), were synthesized from gels with composition of 3.58SiO2: 2.08NaAlO2: 7.59NaOH: 455H2O: 5.06TEA: 2.23TCl. One of these, a colorless single-crystal was ion exchanged by allowing aqueous 0.02 M CsOH to flow past the crystal at 293 K for 3 days, followed by dehydration at 673 K and 1 × 10-6 Torr for 2 days. The crystal structure of fully dehydrated partially Cs+-exchanged zeolite Y, |Cs45Na30|[Si117Al75O384]-FAU per unit cell (ɑ = 24.9080(10) Å) was determined by single-crystal X-ray diffraction technique in the cubic space group Fd 3 m at 294(1) K. The structure was refined using all intensities to the final error indices (using only the 877 reflections with Fo > 4σ(Fo)) R1 = 0.0966 (Based on F) and R2 = 0.2641 (Based on F2). About forty-five Cs+ ions per unit cell are found at six different crystallographic sites. The 2 Cs+ ions occupied at site I, at the centers of double 6-ring (D6Rs, Cs-O = 2.774(10) Å and O-Cs-O = 88.9(3) and 91.1(3)°). Two Cs+ ions are found at site I' in the sodalite cavity; the Cs+ ions were recessed 2.05 Å into the sodalite cavity from their 3-oxygen plane (Cs-O = 3.05(3) Å and O-Cs-O = 77.4(13)°). Site-II' positions (opposite single 6-rings in the sodalite cage) are occupied by 7 Cs+ ions, each of which extends 2.04 Å into the sodalite cage from its 3-oxygen plane (Cs-O = 3.067(11) Å and O-Cs-O = 80.1(3)°). The 26 Cs+ ions are nearly three-quarters filled at site II in the supercage, being recessed 2.34 Å into the supercage (Cs-O = 3.273(8) Å and O-Cs-O = 74.3(3)°). The 4 Cs+ ions are found at site III deep in the supercage (Cs-O = 3.321(19) and 3.08(3) Å), and 4 Cs+ ions at another site III' (Cs-O = 2.87(4) and 3.38(4) Å). About 30 Na+ ions per unit cell are found at one crystallographic site; The Na+ ions are located at site I' in the sodalite cavity opposite double 6-rings (Na-O = 2.578(11) Å and O-Na-O = 97.8(4)°).
Keyword Faujasite-type zeolite
Sodalite cavities
Single-crystal structure
Cesium
Sodium
X-ray
Confirmation
Temperature
Faujasite
Cations
Na-Y
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
ERA 2012 Admin Only
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 8 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 03 Sep 2009, 17:54:27 EST by Mr Andrew Martlew on behalf of School of Chemical Engineering