Novel nanometer-level uniform amorphous carbon coating for boron powders by direct pyrolysis of coronene without solvent

Shu Jun Ye, Ming Hui Song, Hiroaki Kumakura

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A 3 nm coronene coating and a 4 nm amorphous carbon coating with a uniform shell-core encapsulation structure for nanosized boron (B) powders are formed by a simple process in which coronene is directly mixed with boron particles without a solvent and heated at 520°C for 1 h or at 630°C for 3 h in a vacuum-sealed silica tube. Coronene has a melting point lower than its decomposition temperature, which enables liquid coronene to cover B particles by liquid diffusion and penetration without the need for a solvent. The diffusion and penetration of coronene can extend to the boundaries of particles and to inside the agglomerated nanoparticles to form a complete shell-core encapsulated structure. As the temperature is increased, thermal decomposition of coronene on the B particles results in the formation of a uniform amorphous carbon coating layer. This novel and simple nanometer-level uniform amorphous carbon coating method can possibly be applied to many other powders; thus, it has potential applications in many fields at low cost.

Original languageEnglish
Article number045602
JournalNanotechnology
Volume26
Issue number4
DOIs
Publication statusPublished - 2015 Jan 30
Externally publishedYes

Keywords

  • Capacitors
  • Carbon coating
  • Coronene
  • Li-ion battery
  • MgB
  • Photocatalysts

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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