Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Synthesis and Characterization of Amine-Functionalized Manganese Porphyrin Immobilized on Silica-Zirconium Ferrite and Evaluation of Its Catalytic Function in Cyclohexane Oxidation

Document Type : Research Article

Authors
Hamideh Khosravi
Rahmatollah Rahimi
Mahboubeh Rabbani
Ali Maleki
Department of Chemistry, Iran University of Science and Technology, Tehran, I.R. IRAN
Abstract
In this study, we have tried to provide a suitable catalyst for the oxidation of cyclohexane to obtain valuable products such as cyclohexanone and cyclohexanol. The magnetic ZrFe2O4/SiO2-NH-MnTCPP nanocomposite has been introduced as a heterogeneous catalyst for selective oxidation of cyclohexane to cyclohexanol with 100% selectivity and 36% conversion. Two methods have been used for this oxidation, reflux and solvothermal assisted by industrial microwave. The mesoporous ZrFe2O4 with nano cauliflowers structure was synthesized via the solvothermal route and to protect it in chemical media, a layer of SiO2 was deposited on the surface of nanoparticles via the wet method. Then, to modify with manganese tetrakis(4-carboxyphenyl) porphyrin (Mn-TCPP) was immobilized on nanocomposite to prepare ZrFe2O4/SiO2-NH-MnTCPP nanocatalyst. The characterization of all samples was done by Fourier Transform InfraRed (FT-IR) spectroscopy, X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Energy Dispersive X-ray spectroscopy (EDX), Vibrating Sample Magnetometer (VSM) and nitrogen adsorption and desorption isotherms (BET). The catalytic activity of this magnetic nanocomposite in oxidation of cyclohexane was also evaluated by the GC-Mass instrument. Significant advantages of this catalyst include remarkable activity, separation from the reaction medium by the external magnetic field, adequate heat and reaction stability, reusability up to 5 times, and the selectivity in the oxidation of cyclohexane to cyclohexanol with appropriate productivity.
Keywords
ZrFe2O4
Magnetic nanoparticles
Mesoporous
Core-shell
Manganese porphyrin
Oxidation
Cyclohexane

Subjects

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