Synthesis and magnetic properties of Fe3C-C core-shell nanoparticles

被引：42

作者：

Liu, Jun ^{[1
]}

Yu, Bowen ^{[1
]}

Zhang, Qiankun ^{[1
,2
]}

Hou, Lizhen ^{[3
]}

Huang, Qiulai ^{[1
]}

Song, Chunrui ^{[1
]}

Wang, Shiliang ^{[1
,3
]}

Wu, Yueqin ^{[3
]}

He, Yuehui ^{[1
]}

Zou, Jin ^{[3
]}

Huang, Han ^{[3
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Sch Phys & Elect, Changsha 410083, Peoples R China

[2] Hunan Normal Univ, Sch Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China

[3] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia

来源：

NANOTECHNOLOGY | 2015年 / 26卷 / 08期

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

core-shell nanoparticles; iron carbide; carbon; metal-organic chemical vapor deposition; IRON CARBIDE; CARBON; GROWTH; GRAPHITIZATION; NANOCAPSULES; PERFORMANCE; ANODE; FE;

D O I：

10.1088/0957-4484/26/8/085601

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fe3C-C core-shell nanoparticles were fabricated on a large scale by metal-organic chemical vapor deposition at 700 degrees C with ferric acetylacetonate as the precursor. Analysis results of x-ray diffraction, transmission electron microscope and Raman spectroscope showed that the Fe3C cores with an average diameter of similar to 35 nm were capsulated by the graphite-like C layers with the thickness of 2-5 nm. The comparative experiments revealed that considerable Fe3O4-Fe3C core-shell nanoparticles and C nanotubes were generated simultaneously at 600 and 800 degrees C, respectively. A formation mechanism was proposed for the as-synthesized core-shell nanostructures, based on the temperature-dependent catalytic activity of Fe3C nanoclusters and the coalescence process of Fe3C-C nanoclusters. The Fe3C-C core-shell nanoparticles exhibited a saturation magnetization of 23.6 emu g(-1) and a coercivity of 550 Oe at room temperature.

引用

页数：7

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