NDLI: hases of iron carbide nanoparticles : from a perspective of interfering with the carbon penetration of Fe @ Fe 3 O 4 by selectively adsorbed halide ions †

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hases of iron carbide nanoparticles : from a perspective of interfering with the carbon penetration of Fe @ Fe 3 O 4 by selectively adsorbed halide ions †

Content Provider	Semantic Scholar
Author	Yang, Ziyu Zhao, Tianshan Huang, Xiaoxiao Tang, Tianyu Ju, Yanmin Wang, Qian Hou, Yanglong Gaoc, Song
Copyright Year	2016
Abstract	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 (Fe2Chexagonal 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.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://pubs.rsc.org/en/content/articlepdf/2017/SC/C6SC01819J
Alternate Webpage(s)	https://pubs.rsc.org/en/content/articlepdf/2017/sc/c6sc01819j
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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