| Autor: |
Kusyak, A. P., Kusyak, N. V., Oranska, O. I., Kulyk, T. V., Dzubenko, L. S., Palianytsia, B. B., Dudarko, O. A., Korniichuk, N. M., Petranovska, A. L., Gorbyk, P. P. |
| Předmět: |
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| Zdroj: |
Nanosistemi, Nanomateriali, Nanotehnologii; 2023, Vol. 21 Issue 2, p427-449, 23p |
| Abstrakt: |
The processes of carbonization of sucrose-containing coatings on the surface of single-domain magnetite and magnetosensitive nanocomposite (MNC) Fe3O4/Al2O3 are studied. The MNC with a carbon surface is synthesized by the method of low-temperature pyrolysis of carbohydrates. As revealed, the used heat-treatment mode does not lead to deterioration of the magnetic characteristics of magnetite under the condition of preliminary creation of a protective layer of alumina on its surface. Differential thermal analysis (DTA) in combination with differential thermogravimetric analysis (DTGA) and programmed temperature-desorption mass spectrometry show that the carbonization of sucrose under these conditions is complete. The shape and dimensions of the Fe3O4, Fe3O4/Al2O3 and Fe3O4/Al2O3/С MNCs are investigated by the TEM method. As established, the values of the specific saturation magnetization of MNCs are consistent with the corresponding changes in the mass fraction of magnetite in the Fe3O4/Al2O3 and Fe3O4/Al2O3/С structures. The results of TEM studies and magnetic measurements indicate the formation of the Fe3O4/Al2O3 and Fe3O4/Al2O3/С MNCs by the core–shell type. Methylene blue is used to study the adsorption activity of the Fe3O4/Al2O3/С MNC surface. The results of the work can be used in the development of new magnetically controlled adsorption materials for medical–biological purposes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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