Large-scale synthesis and characterization of super-bundle single-walled carbon nanotubes by water-assisted chemical vapor deposition

Yu Zhao, Jihoon Choi, Paul Kim, Weidong Fei, Cheol Jin Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A large-scale synthesis of water-assisted single-walled carbon nanotubes (SWCNTs) was investigated over Fe-Mo/MgO catalysts by catalytic chemical vapor deposition of ethylene. Introduction of water vapor into a reactor induced super-bundle SWCNTs (SB-SWCNTs) and dramatically improved the product yield of SWCNTs from 40 to 206 wt%. By adding water vapor, the average diameter of the SB-SWCNTs was increased from 1.5 to 3.0 nm and distribution of the diameter became wider. The Raman peak intensity ratio (IG/ID) of the SWCNTs, which indicates the crystallinity and defect degree of SWCNTs, showed an almost constant value of 8 regardless of water vapor concentration. The possible growth mechanism of SB-SWCNTs was discussed.

Original languageEnglish
Pages (from-to)30564-30569
Number of pages6
JournalRSC Advances
Volume5
Issue number39
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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