Abstract
The synthesis and structural characterization of an amine-intercalated layered vanadium oxide and its silica-pillared derivative are described. The amine-intercalated vanadium oxide was prepared by reacting V 2O 5 with a mixture of alkylamine and a small amount of water at ambient temperature. The layer structure was examined by means of various analytical techniques, such as X-ray powder diffraction, thermal analysis, IR, UV–Vis and NMR spectroscopy, as well as elemental analysis. The alkylammonium ion-formed bilayers in the interlayer were ion-exchangeable with alkali ions. Moreover, ESR spectra showed that vanadium retained pentavalence through the intercalation reaction, although a small portion of vanadium was found to be reduced after the compound was stored in air for longer than 24 h. By reacting the amine-intercalated layer vanadia with a solution of tetraethyl orthosilicate, amine and acetone, followed by calcination, a silica-pillared derivative of microporous structure and high surface area was obtained.
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