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
收藏
页码：1175 / 1180
页数：6
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