A robust CoxMg1-xO catalyst for predominantly growing (6, 5) single-walled carbon nanotubes

Maoshuai He*, Dong Li, Tao Yang, Danhong Shang, Alexander I. Chernov, Pavel V. Fedotov, Elena D. Obraztsova, Qing Liu, Hua Jiang, Esko Kauppinen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Chirality-controlled growth of single-walled carbon nanotubes (SWCNTs) by chemical vapor deposition (CVD) is one of the most challenging tasks in carbon nanotube synthesis field. During CVD growth, the catalyst plays crucial roles in governing SWCNT nucleation thermodynamics as well as growth kinetics. However, the performances of catalyst are generally sensitive to the metal loading amount in the catalyst and the reaction conditions, like the partial pressure of carbon source and the reaction time. In this work, we have systematically investigated a robust CoxMg1-xO solid solution, which can predominantly yield (6, 5) SWCNTs in a wide range of Co concentration, with a diversity of CO concentrations or a broad-ranging reaction time. Besides, the effect of reaction temperature on SWCNT chirality distribution is demonstrated, the mechanism of which is clarified with the assistance of environmental transmission electron microscopy. Finally, the chirality distribution of SWCNTs grown using CH4 as the carbon source is presented. The effects of carbon sources are discussed in view of SWCNT growth mode.

Original languageEnglish
Pages (from-to)389-395
Number of pages7
JournalCarbon
Volume153
DOIs
Publication statusPublished - 1 Nov 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbon source
  • CoMgO solid solution
  • Partial pressure
  • Single-walled carbon nanotube
  • Tube-metal interaction

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