| Title: | The magnetic and colloidal properties of $CoFe_2O_4$ nanoparticles synthesized by co-precipitation |
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| Authors: | ID Gyergyek, Sašo (Author)
ID Drofenik, Mihael (Author)
ID Makovec, Darko (Author) |
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| Files: |  Acta_Chimica_Slovenica_2014_Gyergyek,_Drofenik,_Makovec_The_magnetic_and_colloidal_properties_of_CoFe2O4_nanoparticles_synthesized_by_co.pdf (279,23 KB)
MD5: 4CD2FE84F0567E81FD02DC2497FDF3DB
PID: 20.500.12556/dkum/bab3e4c8-1afe-4374-886e-53d67e216664
 https://journals.matheo.si/index.php/ACSi/article/view/982
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| Language: | English |
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| Work type: | Scientific work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Magnetic $CoFe_2O_4$ nanoparticles were synthesized by co-precipitation at 80 °C. This co-precipitation was achieved by the rapid addition of a strong base to an aqueous solution of cations. The investigation of the samples that were quenched at different times after the addition of the base, using transmission electron microscopy (TEM) coupled with energy-dispersive X-ray spectroscopy (EDXS) and X-ray powder diffractometry, revealed the formation of a Co-deficient amorphous phase and $Co(OH)_2$, which rapidly reacted to form small $CoFe_2O_4$ nanoparticles. The nanoparticles grew with the time of aging at elevated temperature. The colloidal suspensions of the nanoparticles were prepared in both an aqueous medium and in a non-polar organic medium, with the adsorption of citric acid and ricinoleic acid on the nanoparticles, respectively. The measurements of the room-temperature magnetization revealed the ferrimagnetic state of the $CoFe_2O_4$ nanoparticles, while their suspensions displayed superparamagnetic behaviour. |
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| Keywords: | cobalt ferrite, nanoparticles, co-precipitation, colloidal suspensions, magnetic properties |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2014 |
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| Number of pages: | str. 488-496 |
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| Numbering: | Letn. 61, št. 3 |
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| PID: | 20.500.12556/DKUM-67758  |
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| ISSN: | 1318-0207 |
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| UDC: | 546.732:620.3 |
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| ISSN on article: | 1318-0207 |
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| COBISS.SI-ID: | 28006183 |
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| NUK URN: | URN:SI:UM:DK:RGJT7DDJ |
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| Publication date in DKUM: | 30.08.2017 |
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| Views: | 3013 |
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| Downloads: | 128 |
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| Metadata: |    |
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| Categories: | Misc.
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