Synthesis of Monodisperse Magnetite Nanocrystals via Partially Reduced Precipitation Method

摘要

Ferromagnetic Fe₃O₄ nanocrystals with sphere-like morphology have been successfully synthesized by a partial reduction-precipitated crystallization method using ferric chloride as single iron source, hydroxylammonium chloride (HONH₃Cl) as reducing reagent, and ammonia as precipitating reagent. This synthesis is carried out in a reducing atmosphere in the absence of inert gas. The chemical composition and morphology of the sample were characterized by X-ray power diffraction (XRD), X-ray photoelectron spectra (XPS), and transmission electron microscopy (TEM). The experiment results clearly show that the synthesized sample mainly consists of a large quantity of spherical Fe₃O₄ nanoparticles with a size of about 5-11Â nm, and HONH₃Cl plays important roles in the formation of the products. Besides, the magnetic property of the sample has been investigated using a vibrating sample magnetometer (VSM) and the magnetization saturation value is approximately 43.5Â emu/g.View full textDownload full textKeywordsChemical precipitation approach, Hydroxylammonium chloride, Magnetite, Nanocrystal, Partial deoxidization, TEM, XPS, XRDRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10426911003587477