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PEI-M [M:Cu(II) and Co(II)] hydrogel catalyst for methyl orange degradation and epinephrine oxidation
(Çanakkale Onsekiz Mart Üniversitesi, 2015) Ghorbanloo, Massomeh; Demirci, Şahin; Şahiner, Nurettin
Here, we report the catalytic activity of catalyst derived from polyethylene imine-M (II) (PEI-M: Cu(II), and Co(II)) hydrogel composite in the presence of H2O2 as an oxidant. The PEI-Cu(II)/H2O2 heterogeneous composite was used in the degradation of an azo-dye, methyl orange (MO) in aqueous solution. In the presence of 63 mM H2O2, 100% of MO was removed in 80 min. The kinetics investigation of the processes demonstrated a pseudofirst-order kinetic model was applicable. Additionally, a pharmaceutical product, epinephrine (EP) was partially oxidized to adrenochrome by PEICo(II)/H2O2 hydrogel composite system. About 50% of conversion to adrenochrome was reached in less than 55 min again comply with the pseudo-first-order kinetic model. Both MO and EP oxidation reaction provided mild activation energies, 44.09, and 58.02 kj.mol-1 , respectively. Various parameters effecting MO and EP oxidation were investigated.