期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 321, 期 20, 页码 3515-3519出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2009.06.060
关键词
Core-shell structured; Iron nanoparticle; Borohydride; Montmorillonite; Ferromagnetic
资金
- GIGCAS [IS-1090]
- National Natural Science Foundation of China [40672036]
- Knowledge Innovation Program of the Chinese Academy of Sciences [Kzcx2-yw-112]
- National Science Fund for Distinguished Young Scholars [40725006]
Iron nanoparticles have been successfully synthesized using sodium borohydride solution reduction of ferric trichloride hexahydrate in the presence of montmorillonite as an effective protective reagent and support as well. A combination of characterizations reveals the well disperse of these obtained iron nanoparticles supported on the external surface of clay with roughly spherical morphology and mean diameter of 55 nm. The particles are oxidation resistant well with iron core-iron oxide shell structure. The shell thickness of 3 nm remains almost invariable under ambient conditions. Discernable hysteresis loop reveals ferromagnetic behavior of the iron nanoparticles, which make them easy for magnetic separation and potential in some practical applications. (C) 2009 Elsevier B.V. All rights reserved.
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