中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 21 No. 9 September 2011 |
confined arc plasma
（1. State Key Laboratory of Gansu Advanced New Nonferrous Metal Materials,
Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Science, Lanzhou University of Technology, Lanzhou 730050, China）
Abstract:Carbon encapsulated Fe nanoparticles were successfully prepared via confined arc plasma method. The composition, morphology, microstructure, specific surface area and particle size of the product were characterized via X-ray diffraction, transmission electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray spectrometry and Brunauer-Emmett-Teller N2 adsorption. The experiment results show that the carbon encapsulated Fe nanoparticles have clear core-shell structure. The core of the particles is body centered cubic Fe, and the shell is disorder carbons. The particles are in spherical or ellipsoidal shapes. The particle size of the nanocapsules ranges from 15 to 40 nm, with the average value of about 30 nm. The particle diameter of the core is 18 nm, the thickness of the shells is 6−8 nm, and the specific surface area is 24 m2/g.
Key words: carbon encapsulation; Fe nanoparticles; confined arc plasma
