Details
| Original language | English |
|---|---|
| Pages (from-to) | 95-102 |
| Number of pages | 8 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 100 |
| Issue number | 1-3 |
| Early online date | 28 Nov 2006 |
| Publication status | Published - 23 Mar 2007 |
Abstract
The crystallization of silica-sodalite (SOD) in ethylene glycol solutions at 453 K has been investigated in the absence and presence of water, germanium dioxide and ammonium fluoride. In the systems studied, water at small amounts acts as an additional solvation agent to ethylene glycol, and does not significantly affect sodalite crystallization. At high contents that exceed the molar values equivalent to SiO2, water privileges a formation of the most dense crystalline silica phase, α-quartz. In contrast, presences of germanium and fluoride species favor the crystallization of silica-based materials having the SOD framework structure, which possesses a lower framework density than quartz. An interplaying relationship of these three species has been found and discussed.
Keywords
- Fluoride route, Germanosilicate zeolite, Pure-silica zeolite, Sodalite, Solvothermal synthesis, Water effect
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 100, No. 1-3, 23.03.2007, p. 95-102.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Solvothermal synthesis of germanosilicate-sodalite and silica-sodalite
T2 - Effects of water, germanium and fluoride
AU - Yang, Xiaobo
AU - Albrecht, Daniel
AU - Caro, Jürgen
PY - 2007/3/23
Y1 - 2007/3/23
N2 - The crystallization of silica-sodalite (SOD) in ethylene glycol solutions at 453 K has been investigated in the absence and presence of water, germanium dioxide and ammonium fluoride. In the systems studied, water at small amounts acts as an additional solvation agent to ethylene glycol, and does not significantly affect sodalite crystallization. At high contents that exceed the molar values equivalent to SiO2, water privileges a formation of the most dense crystalline silica phase, α-quartz. In contrast, presences of germanium and fluoride species favor the crystallization of silica-based materials having the SOD framework structure, which possesses a lower framework density than quartz. An interplaying relationship of these three species has been found and discussed.
AB - The crystallization of silica-sodalite (SOD) in ethylene glycol solutions at 453 K has been investigated in the absence and presence of water, germanium dioxide and ammonium fluoride. In the systems studied, water at small amounts acts as an additional solvation agent to ethylene glycol, and does not significantly affect sodalite crystallization. At high contents that exceed the molar values equivalent to SiO2, water privileges a formation of the most dense crystalline silica phase, α-quartz. In contrast, presences of germanium and fluoride species favor the crystallization of silica-based materials having the SOD framework structure, which possesses a lower framework density than quartz. An interplaying relationship of these three species has been found and discussed.
KW - Fluoride route
KW - Germanosilicate zeolite
KW - Pure-silica zeolite
KW - Sodalite
KW - Solvothermal synthesis
KW - Water effect
UR - http://www.scopus.com/inward/record.url?scp=33846849054&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2006.10.023
DO - 10.1016/j.micromeso.2006.10.023
M3 - Article
AN - SCOPUS:33846849054
VL - 100
SP - 95
EP - 102
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1-3
ER -