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Influence of synthesis parameters on vanadium-Silicalite-1 crystal growth prepared with fluoride-containing media (Articolo in rivista)
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- Influence of synthesis parameters on vanadium-Silicalite-1 crystal growth prepared with fluoride-containing media (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.jcrysgro.2005.11.107 (literal)
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Tavolaro, A.; Tavolaro, P.;Drioli, E. (2006)
Influence of synthesis parameters on vanadium-Silicalite-1 crystal growth prepared with fluoride-containing media
in Journal of crystal growth; elsevier B.V., Amsterdam (Paesi Bassi)
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- Tavolaro, A.; Tavolaro, P.;Drioli, E. (literal)
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- http://www.sciencedirect.com/science/article/pii/S0022024805014314 (literal)
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- Istituto per la tecnologia delle membrane;
Dipartimento di Biologia Cellulare, Università della Calabria;
Istituto per la tecnologia delle membrane (literal)
- Titolo
- Influence of synthesis parameters on vanadium-Silicalite-1 crystal growth prepared with fluoride-containing media (literal)
- Abstract
- Vanadium-silicalite-1 samples are readily prepared at 170 degrees C from fluoride-containing gels. The amounts of vanadium and fluoride salts were varied in gels of initial composition 10SiO(2):xVO(2):1.25TPABr:gamma MF:330H(2)O with the vanadium Source = VOSO4, V2O5, VO(acac)(2) and 0.05 <= x >= 3.0, M = NH4, Na, K and gamma = 1, 3, 5, 7, 10 and TPABr = tetrapropylammonium bromide. The influence of synthesis parameters (Na/Si, MF/Si, Si/V, the vanadium source) oil the preparation of well-formed crystals was systematically investigated. Sodium and potassium cations show different behaviours with respect to ammonium ions on the crystallization rates and crystal aspect ratios. Crystal morphologies are strongly influenced by the nature of the fluoride salt added to the reaction mixture. The vanadium incorporation in zeolite crystals increases regularly with the initial transition metal and fluoride content in the reaction batch. Moreover, the vanadium incorporation is similar for the various salts used. The kinetic data show that the vanadium fluoride amount not only influences the reaction rates, but also the induction periods. (literal)
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