Hydrothermal synthesis and characterisation of two novel large-pore framework vanadium silicates
authors Brandao, P; Valente, A; Philippou, A; Ferreira, A; Anderson, MW; Rocha, J
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords microporous materials; silicates; vanadium; catalysis; hydrothermal synthesis
keywords MESOPOROUS MOLECULAR-SIEVES; OXIDE CATALYSTS; SPECTROSCOPY; REACTIVITY; OXIDATION; ETHANOL
abstract Two new large-pore sodium vanadium silicates, denoted AM-15 and AM-17 (Aveiro-Manchester, structures number 15 and 17) with framework composition Na6Si14V4O39 and Na4CaSi10V2O27, respectively, are reported. Electron paramagnetic resonance (EPR), Fourier transform infrared (FTIR) and diffuse reflectance ultraviolet-visible (DR UV/Vis) spectroscopy reveal that as-prepared AM-15 contains both V-IV and V-V in a square pyramidal and tetrahedral coordination, respectively, while AM-17 contains predominantly octahedral V-IV The thermal stability of AM-15 in air is modest (ca. 380 degreesC), while AM-17 is stable up to 450 degreesC. The acid-base and redox properties of AM-17 have been assessed by the conversion of isopropanol and ethanol oxidation, respectively. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003).
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2003
issue 6
beginning page 1175
ending page 1180
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000181813000017
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journal impact factor 2.507
5 year journal impact factor 2.381
category normalized journal impact factor percentile 70.000
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