Open AccessFerromagnetic Property and Synthesis of Onion-Like Fullerenes by Chemical Vapor Deposition Using Fe and Co Catalysts Supported on NaCl
Author(s) -
Yongzhen Yang,
Xuguang Liu,
Yanxing Han,
Wenfang Ren,
Bingshe Xu
Publication year - 2010
Publication title -
journal of nanomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 66
eISSN - 1687-4129
pISSN - 1687-4110
DOI - 10.1155/2011/720937
Subject(s) - materials science , raman spectroscopy , transmission electron microscopy , catalysis , fullerene , nanoparticle , carbon fibers , chemical engineering , metal , ferromagnetism , scanning electron microscope , high resolution transmission electron microscopy , analytical chemistry (journal) , nanotechnology , composite number , composite material , metallurgy , organic chemistry , chemistry , physics , engineering , optics , quantum mechanics
Metal-encapsulating onion-like fullerenes (M@OLFs) were synthesized by CVD at relatively low temperature (420C∘) using Fe and Co nanoparticles impregnated into NaCl as catalyst. The morphology and structure of the products were characterized by field emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. The results show that Fe@OLFs and Co@OLFs with stacked graphitic fragments were prepared using Fe/NaCl or Co/NaCl as catalysts; after Co@OLFs were immersed in concentrated HCl for 48 hours, Co nanoparticles encapsulated by carbon shells were not removed, meaning that carbon shells can protect the encapsulated Co cores against environmental degradation. The coercivity value (750.23 Oe) of Co@OLFs showed an obvious magnetic property
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