Solid-Phase Synthesis of Carbon-Encapsulated Magnetic Nanoparticles
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- 作者：Cheng Fa Wang ; Jian Nong Wang ; Zhao Min Sheng
- 刊名：Journal of Physical Chemistry C
- 出版年：2007
- 出版时间：May 3, 2007
- 年：2007
- 卷：111
- 期：17
- 页码：6303 - 6307
- 全文大小：323K
- 年卷期：v.111,no.17(May 3, 2007)
- ISSN：1932-7455
文摘
Carbon-encapsulated magnetic nanoparticles (CEMNPs) have wide applications. However, synthesis of suchparticles with superparamagnetic properties is still a great challenge. The present study reports a new methodfor the production of CEMNPs in the solid state. An Fe/C solid solution was first prepared by pyrolysis ofFe(CO)5 and C2H2. Heat treatment of this material at low temperatures (
600 
C) generated fine nanoparticles(~7 nm) with superparamagnetic properties, but treatment at high temperatures (>600 C) produced largernanoparticles (
30 nm) exhibiting permanent magnetic behavior. The advantages of the present solid-phaseapproach over previous gas-phase methods include good controllability of particle size and thus magneticproperties and suitability for large-scale production.
600 C) generated fine nanoparticles(~7 nm) with superparamagnetic properties, but treatment at high temperatures (>600 C) produced largernanoparticles (30 nm) exhibiting permanent magnetic behavior. The advantages of the present solid-phaseapproach over previous gas-phase methods include good controllability of particle size and thus magneticproperties and suitability for large-scale production.