RESEARCH ARTICLE


Synthesis and Characterization of Polyhedral Graphite Particles



Wen Qian, Qianwang Chen*, Fangyu Cao, Changle Chen
Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science & Technology of China, Hefei 230026, P.R. China


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© 2008 Qian et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science & Technology of China, Hefei 230026, P.R. China; E-mail: cqw@ustc.edu.cn


Abstract

Hollow polyhedral graphite particles with 200∼400 nm in diameter have been synthesized by heating oxalic acid, ferrocene and metallic magnesium at 580 °C, typically forming diamond-like octahedral structure. Combined with SEM, TEM, SAED patterns, and Raman spectroscopy, it was shown that the surface of graphite polyhedrons is composed of approximately 30-40 graphene shells; the four- or six- fold symmetric diffraction spots disclosed the nature of octahedral graphite particles; the edge of the graphite polyhedrons exists sp3-hybridized bonding, which would act as dangling bonds and localized defects in the polyhedron.

Keywords: Nanostructures, chemical synthesis, crystal structure and symmetry.