Synthesis and characterization of two novel large-pore crystalline vanadosilicates

被引：27

作者：

Brandao, P

Philippou, A

Hanif, N

Ribeiro-Claro, P

Ferreira, A

Anderson, MW

Rocha, J ^{[1
]}

机构：

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

[2] Univ Aveiro, ESTGA, P-3810193 Aveiro, Portugal

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

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 03期

关键词：

D O I：

10.1021/cm010613q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two novel large-pore sodium vanadosilicates (Aveiro-Manchester, structure numbers 13 and 14) containing stoichiometric amounts of vanadium (Si/V = 10 and 4, respectively) have been synthesized. Only one other example of a large-pore vanadosilicate (AM-6) is known. AM-13 and AM-14 were characterized by bulk chemical analysis (ICP); powder X-ray diffraction (XRD); scanning electron microscopy (SEM); thermogravimetric analysis (TGA); differential scanning calorimetry (DSC); N-2, n-hexane, benzene, and tripropylamine adsorption measurements; and Raman and diffuse reflectance ultraviolet-visible (DR UV-vis) spectroscopies. The acid-base and redox properties of these materials were assessed by 2-propanol conversion and ethanol oxidation, respectively. Both materials exhibit high selectivities to acetaldehyde, indicating that these two novel vanadosilicates are promising redox catalysts.:However, because the thermal stability of AM-14 is modest (ca. 350 degreesC), its potential use as a catalyst is limited.

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收藏

页码：1053 / 1057

页数：5

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