alexa Catalytic Performance of Carbon Nanotubes Supported 12-
ISSN: 2157-7048

Journal of Chemical Engineering & Process Technology
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Research Article

Catalytic Performance of Carbon Nanotubes Supported 12-Tungstosilicic Acid in the Electrooxidation of Cyclohexane to Cyclohexanone and Cyclohexanol

Al-Mayouf AM, Saleh MSA, Aouissi A* and Al-Suhybani AA
Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
Corresponding Author : Ahmed Aouissi
Prof in Physical Chemistry
Chemistry Department, College of Science
King Saud University, Riyadh11451, Saudi Arabia
Tel: +96614675958
Fax: +96614675992
E-mail: [email protected]
Received December 23, 2013; Accepted January 16, 2014; Published January 20, 2014
Citation: Al-Mayouf AM, Saleh MSA, Aouissi A, Al-Suhybani AA (2014) Catalytic Performance of Carbon Nanotubes Supported 12-Tungstosilicic Acid in the Electrooxidation of Cyclohexane to Cyclohexanone and Cyclohexanol. J Chem Eng Process Technol 5:183. doi:10.4172/2157-7048.1000183
Copyright: © 2014 Al-Mayouf AM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Carbon nanotubes-supported 12-tungsto-silicic materials (referred as CNT- SiW12-x, where x is the loading of H4SiW12O40, abbreviated as SiW12 were prepared and characterized by means of FTIR, XRD, and polarography. The prepared catalysts and attached onto glassy carbon (GC) electrodes by using polyvinylidene difluoride (PVDF) as binder. The resulting carbon supported SiW12 modified electrodes were investigated by cyclic voltammetry (CV) and tested for the electrooxidation of cyclohexane to cyclohexanone (K) and cyclohexanol (A). It has been found that the cyclohexanone, cyclohexanol and cyclohexyl hydroperoxide (CyOOH) are formed as major products of the reaction. Exchanged electronic charge and reaction time had an obvious influence on the catalytic performance of the catalyst. Short reaction time and low exchanged electronic charge favor the formation of cyclohexanol. High exchanged electronic charge and long reaction time favor the electrooxidation of cyclohexanol to cyclohexanone. The optimum condition for the formation of the cyclohexanone, which is needed for the production of the ε-caprolactam, is high exchanged electronic charges.

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