Controlled regulation of the transformation of carbon nanomaterials under H2 mixture atmosphere by arc plasma

Da Zhang, Zhipeng Xie, Kaiwen Zhang, Haoyu Wang, Tao Qu, Wenhui Ma, Bin Yang, Yongnian Dai, Feng Liang, Yong Lei, Takayuki Watanabe

研究成果: Contribution to journalArticle査読

抄録

Hydrogen plays a pivotal role in carbon nanomaterials synthesis by arc plasma. However, the effect of hydrogen on morphological regulation of carbon nanomaterials has received little attention. In this paper, carbon nanomaterials synthesized under mixed H2/Ar, H2/N2, and Ar/N2 atmospheres with different ratios were investigated in detail to tackle the issue. Graphene, carbon nanocages, polyhedral graphite particles, amorphous carbon nanoballs, and carbon nanohorns underwent structural transformation as hydrogen content reduced. As a result of varying hydrogen concentration, the number of C-H bond sites at the edge of graphene islands differed, leading to the structural transformation of carbon nanomaterials originating from the formation of various types of precursors. Meanwhile, X-ray photoelectron spectroscopy results revealed that hydrogen impeded nitrogen doping because it tended to bond with electronegative nitrogen. Moreover, morphology control capability followed the order of H2 > N2 > Ar during the preparation of carbon nanomaterials through arc plasma under a mixed atmosphere.

本文言語英語
論文番号116695
ジャーナルChemical Engineering Science
241
DOI
出版ステータス出版済み - 9 21 2021

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 化学工学(全般)
  • 産業および生産工学

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