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Preparation of Carbon Encapsulated Iron Nanoparticles with Very Thin Shells by DC Arc Discharge
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作者 崔屾 张丽爽 +5 位作者 崔兰 张帆 林奎 靳凤民 李玲 Sayyar Ali Shah 《Transactions of Tianjin University》 EI CAS 2015年第1期11-18,共8页
Carbon encapsulated iron nanoparticles (CEINPs) with very thin shells and good core-shell structures were prepared by DC arc discharge at argon intake temperature (AIT) of 800 ℃. The results of high resolution tr... Carbon encapsulated iron nanoparticles (CEINPs) with very thin shells and good core-shell structures were prepared by DC arc discharge at argon intake temperature (AIT) of 800 ℃. The results of high resolution transmission electron microscope (HRTEM), energy dispersive X-ray (EDX) spectroscope, X-ray diffraction (XRD), and X-ray photoelectron spectroscope (XPS) characterizations on the product B show that the thickness of the carbon shells of CEINPs in the product B is in the range of ca. 0.5-5.3 nm, i. e., which can be as thin as only two layers of graphite. The average diameter of the CEINPs is about 24. 7 nm. The total content of Fe element in the product B is 77.0 wt%. The saturation magnetization (Ms) and coercivity (Hc) of the product B are 107.4 emu/g and 143 Oe. resnectivelv. The formation of the CEINPs in the oroduct B is discussed briefly. 展开更多
关键词 carbon encapsulated iron nanoparticle dc arc discharge shell structure magnetic property
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