Synthesis, Characterization of Magnetic Composites and Testing of Their Activity in Liquid-Phase Oxidation of Phenol with Oxygen

The development and improvement of methods for the synthesis environmentally friendly catalysts based on base metals is currently an urgent promising task modern catalysis. Catalysts nanoscale magnetite maghemite have fast adsorption–desorption kinetics high chemical activity. purpose this work to obtain magnetic composites, determine their physicochemical characteristics verify activity in process liquid-phase oxidation phenol with oxygen. Magnetic nanocomposites were obtained by co-deposition salts ferrous trivalent iron. synthesized composites studied X-ray diffractometry, energy dispersive fluorescence Mössbauer spectroscopy, IR-Fourier spectroscopy elemental analysis. To increase catalytic oxidative processes, surfaces modified using cobalt nitrate salt. Further, CoFe2O4 was stabilized adding polyethylenimine (PEI) as a surfactant. Preliminary studies oxygen, most typical environmental pollutant carried out Fe3O4, CoFe2O4, CoFe2O4/PEI catalysts. spectrum reaction product shows presence CH aromatic ring double C=C bonds, stretching vibrations C=O groups carbonyl compounds; band at 3059 cm−1 corresponds bonds 3424 hydroquinone compounds. 1678 intense 1646 refer group benzoquinone. Peaks 1366 1310 can be related C–H C–C quinone ring. Thus, it demonstrated that produced iron oxide are quite effective