title: Preparation, characterization and catalytic activity of CoFe2O4 nanoparticles as a magnetically recoverable catalyst for selective oxidation of benzyl alcohol to benzaldehyde and reduction of organic dyes.
abstract: The CoFe2O4 nanoparticles (NPs) performance was studied in the oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) with hydrogen peroxide as an oxidant under solvent-free conditions. The influences of reaction conditions like the amount of catalyst, the molar ratio of H2O2:BzOH, reaction temperature and times on the oxidation of BzOH by using CoFe2O4 NPs were investigated in details. Under optimum conditions, excellent result, >99% conversation of BzOH to BzH as the only product, was obtained. The nanocatalyst was also used for the reduction of 4-nitrophenol (4-NP), Congo red (CR), Methylene blue (MB) in water at room temperature. The magnetic properties of the catalyst provided a convenient and easy route for the separation of the catalyst from the reaction mixture by an external bar magnet. No obvious loss of activity was observed when the spent catalyst reused in three consecutive runs.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Qom, Po. Box 37185-359, Qom, Islamic Republic of Iran. Electronic address: mahmoudnasr81@gmail.com.
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Nasrollahzadeh
authors.affiliation: Material Research School, NSTRI, Isfahan 81465-1589, Islamic Republic of Iran. Electronic address: mjmo123@yahoo.com.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Bagherzadeh
authors.affiliation: Pharmaceutical Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156, Islamic Republic of Iran; Young Researchers and Elite Club, Shahreza Branch, Islamic Azad University, Shahreza, Islamic Republic of Iran.
authors.forename: Hirbod
authors.initials: H
authors.lastname: Karimi
mesh_terms: D019905:Benzyl Alcohol / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D003035:Cobalt; D003224:Congo Red; D019905:Benzyl Alcohol; D008751:Methylene Blue
keywords: Benzaldehyde; Benzyl alcohol; CoFe(2)O(4) NPs; Organic dyes; Oxidation; Reduction