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Fe-encapsulating carbon nano onionlike fullerenes from heavy oil residue

Published online by Cambridge University Press:  31 January 2011

Yongzhen Yang ,
Xuguang Liu  and
Bingshe Xu
Yongzhen Yang
Affiliation:
Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Xuguang Liu
Affiliation:
Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China; and College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Bingshe Xu*
Affiliation:
Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China; and College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Fe-encapsulating carbon nano onionlike fullerenes (NOLFs) were obtained by chemical vapor deposition (CVD) using heavy oil residue as carbon source and ferrocene as catalyst precursor in an argon flow of 150 mL/min at 900 °C for 30 min. Field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD), and Raman spectroscopy were used to characterize morphology and microstructure of the products. The results show that Fe-encapsulating NOLFs collected at the outlet zone of quartz tube had core/shell structures with sizes ranging from 3 to 6 nm and outer shells composed of poorly crystallized graphitic layers. Their growth followed particle self-assembling growth mechanism, and all atoms in the graphite sheets primarily arose from Fe-carbide nanoparticles.

Keywords

Chemical vapor deposition (CVD) (deposition)NanostructureTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 5 , May 2008 , pp. 1393 - 1397
Copyright
Copyright © Materials Research Society 2008

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References

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