SYNTHESIS AND PROPERTIES OF MAGNETIC COMPOSITE Fe3O4 STABILIZED BY POLYMERS FOR CATALYTIC OXIDATION OF AROMATIC HYDROCARBONS

• DOI: 10.31788/rjc.2024.1749059
• Publication Date: 2024-11-26T05:21:36Z
• Authors: T.V. Shakiyeva; L.R. Sassykova; B.T. Dossumova; M. S. Ilmuratova; U.N. Dzhatkambayeva; S. Sendilvelan

The present study is aimed at creating catalytic systems based on magnetite (Fe3O4) stabilized by polymers (polyvinylpyrrolidone (PVP) and chitosan), for liquid-phase oxidation of organic compounds with gaseous oxygen in order to obtain oxygen-containing that can be used the production dyes, synthetic fibers, drugs, many other petrochemical products. Magnetic composites Fe3O4 PVP chitosan were synthesized coprecipitation method. prepared magnetic studied physicochemical analysis methods. It was found surface stabilization leads a decrease size nanocrystallites nanocomposites. sizes are less than ∼ 10 nm. Mössbauer spectra obtained Fe3O4, Fe3O4/PVP, Fe3O4/chitosan composite catalysts showed presence trivalent iron ions tetrahedral environment Fe2+ Fe3+ an octahedral environment, as well doublet spectrum. possibilities using magnetite-based heterogeneous para-xylene considered. Based IR final reaction samples, CH bonds aromatic ring C=C double bonds, valence vibrations C=O group carbonyl hydroxyl groups established. shown main products p-xylene p-toluyl aldehyde dibutyl phthalate, which widely basic synthesis. authors concluded Fe3O4/PVP composition produce compounds, particular, toluyl phthalate.