期刊
CHEMICAL SCIENCE
卷 8, 期 1, 页码 473-481出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sc01819j
关键词
-
资金
- NSFC [51590882, 81421004, 51125001, 51172005]
- Beijing Municipal Science and Technology Project [Z141100003814012]
- NSFC-RGC Joint Research Scheme [51361165201]
- Beijing Natural Science Foundation [2122022]
- Doctoral Program of the Ministry of Education of China [20120001110078]
- Opening Funds of National Laboratory of Molecular Science
Iron carbide nanoparticles (ICNPs) are considered to have great potential in new energy conversion, nanomagnets and biomedical applications due to their intrinsically peculiar magnetic and catalytic properties. However, the synthetic routes were greatly limited in morphology and phase controlled synthesis. In this article, we present a versatile solution chemistry route towards colloidal ICNPs (Fe-2-Chexagonal and monoclinic syngony, Fe5C2-monoclinic syngony and Fe3C-orthorhombic syngony) derived from body centered cubic Fe@Fe3O4 by introducing heteroatoms to restrain their phase transformation. We found that the phases of Fe2C NPs could be controlled by direct phase transformation in the drastic thermally driven procedure (defined as thermodynamical manner). Meanwhile, the selective adsorption of Cl ions weakened the bonding between Fe and C atoms, thus interfering with the penetration of C atoms to form lower carbon content Fe5C2 and Fe3C NPs. The kinetic mechanisms were evaluated using density functional theory (DFT) simulations focusing on the bonding energy between Fe-C and Fe-Cl atoms. All the obtained ICNPs exhibited typically soft ferromagnetic properties with the highest saturation magnetization value of 101.2 emu g(-1) and the highest Curie temperature of 497.8 K.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据