Synthesis and characterization of ET(P)S-4 and ET(P)S-10

Phosphorus containing ET(P)S-4 and ET(P)S-10 were synthesized from gels of composition xNa 2O–0.6KF–0.2TiO 2–(1.28 − 4 y) xHCl– yP 2O 5–1.49SiO 2–39.5H 2O at 190 °C for 3 days. The XRD patterns are almost identical to the corresponding ETS samples. The presence of phosphorus in the initial gel influ...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2005, Vol.80 (1), p.263-268
Main Authors: Pavel, C.C., Vuono, D., De Luca, P., Bilba, N., B.Nagy, J., Nastro, A.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
ETS-10
ETS-4
Exact sciences and technology
General and physical chemistry
Hydrothermal crystallization
Isomorphous substitution
NMR analyses
Porous materials
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Summary:Phosphorus containing ET(P)S-4 and ET(P)S-10 were synthesized from gels of composition xNa 2O–0.6KF–0.2TiO 2–(1.28 − 4 y) xHCl– yP 2O 5–1.49SiO 2–39.5H 2O at 190 °C for 3 days. The XRD patterns are almost identical to the corresponding ETS samples. The presence of phosphorus in the initial gel influences the kinetic parameters of the crystallization process, the morphology and the size of the crystals. The 31P-NMR of the samples show that part of the phosphorus is attached at the siliceous surface as dihydrogenophosphate SiOP O(OH) 2 groups and cannot be introduced in a tetrahedral or octahedral framework position.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2004.12.021