Cobalt Oxide Nanoparticles Supported on γ-Alumina as Catalysts in The Selective Oxidation of Alcohols in Aqueous Phase

Bahman Abbaszadeh, Amin Ebadi ^* and Shahab Eslami

Department of Chemistry, Kazerun Branch, Islamic Azad University,Kazerun, Iran.

Corresponding Author E-mail : ebadiamin88@yahoo.com

DOI : http://dx.doi.org/10.13005/bbra/2105

ABSTRACT: In this work, cobalt oxide nanoparticles supported on γ-alumina were prepared and were well characterized by scanning electron micrograph (SEM) and X-ray diffraction patterns. These were employed as catalysts for the oxidation of alcohols to aldehydes or ketones with tert-butylhydroperoxide (TBHP) and hydrogen peroxide (H₂O₂) as the oxidant in the liquid phase. For these cobalt oxide nanoparticles supported on γ-alumina, acetonitrile as the solvent was employed. The research results showed that oxidant and the catalyst type influenced the conversion percent of alcohols oxidation. TBHP was found to be better oxidant than H₂O₂ since higher conversion percent of alcohols were observed when TBHP was employed. The catalytic activity of 10%Co₃O₄/nano-γ-alumina was superior to that of 5% and 15% Co₃O₄/nano-γ-alumina catalysts. Under the optimum reaction conditions, the catalytic system of 10%Co₃O₄ nanoparticles supported on γ-alumina gave about 82.3% conversion percent of cyclohexanol.

KEYWORDS: Oxidation; γ-Alumina; Nanoparticles; Co₃O_4; Alcohols

[ HTML Full Text]