Structure and Properties of Nanosized Composites Based on Fe3O4 and Humic Acids

Nanocrystalline composite materials based on magnetite Fe 3 O 4 and humic acids (HA) were synthesized and characterized. Investigation of these materials by EPR, fluorescence spectroscopy, electron microscopy, and XRD analysis showed that the surface of magnetite nanoparticles was densely covered wi...

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Bibliographic Details
Published in:Russian journal of physical chemistry. B 2018, Vol.12 (1), p.172-178
Main Authors: Kokorin, A. I., Kulyabko, L. S., Degtyarev, E. N., Kovarskii, A. L., Patsaeva, S. V., Dzhardimalieva, G. I., Yurishcheva, A. A., Kydralieva, K. A.
Format: Article
Language:English
Subjects:
Chemical Physics of Nanomaterials
Chemical reactions
Chemistry
Chemistry and Materials Science
Composite materials
Ferromagnetism
Fluorescence
Humic acids
Hydroxyl groups
Iron oxides
Magnetite
Nanoparticles
Physical Chemistry
Spectrum analysis
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Summary:Nanocrystalline composite materials based on magnetite Fe 3 O 4 and humic acids (HA) were synthesized and characterized. Investigation of these materials by EPR, fluorescence spectroscopy, electron microscopy, and XRD analysis showed that the surface of magnetite nanoparticles was densely covered with HA molecules, the size of the Fe 3 O 4 nucleus decreasing when the HA : Fe 3 O 4 ratio increased. An EPR study showed that the structure of the ferromagnetic magnetite nanoparticles changed at increased HA contents. The IR and fluorescence spectroscopy data suggest active participation of carboxyl and hydroxyl groups of HA in the adsorption of HAs on the Fe 3 O 4 surface. The main types of interaction of Fe 3 O 4 with HA were considered, and a scheme of possible chemical reactions was proposed.
ISSN:1990-7931
1990-7923
DOI:10.1134/S1990793118010207