Synthesis of vanadium oxides 5 wt.%VO2�?�M𝑥O�? by sol�?�gel process and application in cyclohexene epoxidation

Bulletin of materials science

C Kappenstein¹  I Rekkab²  A Choukchou-Braham²  L Pirault-Roy¹  S Bedrane²  S El-Korso² 

[1] LACCO UMR 6503, Laboratoire de catalyse, Faculté des sciences Fondamentales et appliquées, 86022 Poitiers Cedex, France$$LACCO UMR 6503, Laboratoire de catalyse, Faculté des sciences Fondamentales et appliquées, 86022 Poitiers Cedex, FranceLACCO UMR 6503, Laboratoire de catalyse, Faculté des sciences Fondamentales et appliquées, 86022 Poitiers Cedex, France$$;Laboratoire de catalyse et synthèse en chimie organique. Faculté des sciences, Université A. Belkaid, B.P. 119 Tlemcen 1300, Algérie$$Laboratoire de catalyse et synthèse en chimie organique. Faculté des sciences, Université A. Belkaid, B.P. 119 Tlemcen 1300, AlgérieLaboratoire de catalyse et synthèse en chimie organique. Faculté des sciences, Université A. Belkaid, B.P. 119 Tlemcen 1300, Algérie$$

关键词: Vanadium oxide;    solâ€�?�gel;    epoxidation;    cyclohexene;    TBHP.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

A series of SiO₂, Al₂O₃ and TiO₂ mixed vanadium materials have been prepared from inorganic precursors via the solâ€�?�gel process and subsequently dried, calcined and reduced at elevated temperatures. Structural characterization of these materials was carried out by X-ray diffraction (XRD), N₂ adsorption at 77 K, thermal analysis (TGA/DTA), UV-vis diffused reflectance spectroscopy (DR UV-vis) and scanning electron microscopy (SEM) with energy dispersive X-ray (EDX). Their catalytic activities in the epoxidation of cyclohexene with TBHP as oxidant were also examined. Results of XRD and DR UV-visible diffused revealed that VO₂ species are predominant in all samples and no formation of V₂O₅ was detected. Experimental results indicated that the VO₂â€�?�SiO₂ catalysts performed excellently for the epoxidation of cyclohexene by tertiobutyl hydroperoxide.

【 授权许可】

Unknown