Magnetic properties of carbon coated Fe, Co and Ni nanoparticles

被引：34
|
作者：
Wu, Aibing [1 ]
Yang, Xuwei [1 ]
Yang, Hua [1 ]
机构：
[1] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 513卷
基金：
中国国家自然科学基金;
关键词：
Fe@C; Co@C; Ni@C; Magnetic properties; Nanoparticles; GRAPHITE-ENCAPSULATED NANOCRYSTALS; SOLID-STATE METATHESIS; RAMAN-SPECTROSCOPY; AMORPHOUS-CARBON; METAL-OXIDES; CARBIDE NANOPARTICLES; ELECTRON DIFFRACTION; NITRIDE; NICKEL; COBALT;
D O I：
10.1016/j.jallcom.2011.10.018
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Carbon coated Fe, Co and Ni nanoparticles (Fe@C, Co@C and Ni@C) have been fabricated by an efficient solid-state route using melamine as carbon source. The structure and morphology of Fe@C, Co@C and Ni@C nanoparticles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It is shown that the structure and morphology of Fe@C are different from those of Co@C and Ni@C. The crystallinity of carbon in Fe@C, Co@C and Ni@C nanoparticles was examined by Raman spectroscopy. The results indicate that the graphitization degree of carbon decreases in the order Fe@C > Co@C > Ni@C. Additionally, the reactions involved in the syntheses are speculated. The magnetic properties of Fe@C, Co@C and Ni@C nanoparticles were tested by VSM at room temperature. The variations of magnetic properties of Co@C and Ni@C with the increase of reactive temperatures are discussed respectively. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：193 / 201
页数：9
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