Synthesis of Fe3O4 Nanoparticles and their Magnetic Properties

Fe3O4 magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method using sodium citrate and oleic acid as modifiers. Phase composition and microstructure analysis indicate that the sodium citrate and oleic acid have been successfully grafted onto the surface of Fe3O4 MNPs. The magneti...

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Veröffentlicht in:Procedia engineering Jg. 27; S. 632 - 637
Hauptverfasser: Wei, Yan, Han, Bing, Hu, Xiaoyang, Lin, Yuanhua, Wang, Xinzhi, Deng, Xuliang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 2012
Schlagworte:
Fe3O4
magnetic nanoparticles
modification
Fe3O4
magnetic nanoparticles
modification
ISSN:1877-7058, 1877-7058
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Zusammenfassung:Fe3O4 magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method using sodium citrate and oleic acid as modifiers. Phase composition and microstructure analysis indicate that the sodium citrate and oleic acid have been successfully grafted onto the surface of Fe3O4 MNPs. The magnetic behaviors reveal that the modification can decrease the saturation magnetization of Fe3O4 MNPs due to the surface effect. Fe3O4 MNPs modified by sodiumcitrate and oleic acid show excellent dispersion capability, which should be ascribed to the great reduction of high surface energy and dipolar attraction of the nanoparticles.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2011.12.498