Hydrothermal synthesis and characterisation of two novel large-pore framework vanadium silicates

被引：1

作者：

Brandao, P ^{[1
]}

Valente, A

Philippou, A

Ferreira, A

Anderson, MW

Rocha, J

机构：

[1] Univ Aveiro, Dept Chem, CICECO, P-3810193 Aveiro, Portugal

[2] UMIST, Dept Chem, Manchester M60 1QD, Lancs, England

[3] Univ Aveiro, ESTGA, CICECO, P-3810193 Aveiro, Portugal

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2003年 / 06期

关键词：

microporous materials; silicates; vanadium; catalysis; hydrothermal synthesis;

D O I：

10.1002/ejic.200390151

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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).

引用

页码：1175 / 1180

页数：6

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