| Autor: |
Bordun, Ihor, Malovanyy, Myroslav, Nahurskyi, Nazar, Borysiuk, Anatoliy, Szymczykiewicz, Ewelina |
| Zdroj: |
Materials Science Forum; September 2024, Vol. 1127 Issue: 1 p83-92, 10p |
| Abstrakt: |
The porous structure and magnetic properties of nanostructured Fe3O4/C composites based on wheat straw were investigated in this work. The synthesis was carried out by a one- and two-step method using FeCl3 and ZnCl2 as activating agents. X-ray diffraction methods have shown the presence of an additional phase of magnetite Fe3O4 in both synthesized composites, along with the amorphous carbon phase. Magnetic measurements have shown that the composite synthesized in one step has better magnetic properties, in particular, a higher specific saturation magnetisation. However, the samples of the composite synthesized in two steps are characterised by a higher content of micropores and mesopores, which causes an increase in the specific surface area to 884 m2/g compared to 405 m2/g for the samples synthesized in one step. Based on the dependence of the coercive force on the particle diameter in Fe3O4 dispersions, it was found that the average size of the magnetite particles is ~25 nm for both synthesized magnetoresponsive composites. |
| Databáze: |
Supplemental Index |
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