Synthesis of high quality single-walled carbon nanotubes on natural sepiolite and their use for phenol absorption

Jing Qi Nie, Qiang Zhang, Meng Qiang Zhao, Jia Qi Huang, Qian Wen, Yu Cui, Wei Zhong Qian, Fei Wei

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Natural sepiolite mineral was used as a catalyst and catalyst support for the efficient growth of single-walled carbon nanotubes (SWCNTs). With the introduction of hydrogen, uniform active metal nanoparticles can be formed in the fibrous structure of sepiolite ore. High-quality SWCNTs with few defects and a large aspect ratio (over 104) were synthesized. The structure of the CNTs was modified by controlling the catalyst composition with ion-exchange method and changing the growth conditions. The 1 wt.% Fe-based catalyst exhibited excellent activity for the growth of SWCNTs, while the Co/Mo-based catalyst preferred to grow small diameter SWCNTs. The reaction temperature showed a sensitive selectivity to the chirality and diameter distribution of the SWCNTs produced. Catalysts based on the sepiolite can also afford the effective growth of SWCNTs in a fluidized bed reactor. As-grown SWCNTs/calcined-sepiolite demonstrated excellent ability of phenol adsorption, with an adsorption capacity of 155.8 mg/g, which was much higher than that on natural sepiolite (12.7 mg/g).

Original languageEnglish (US)
Pages (from-to)1568-1580
Number of pages13
JournalCarbon
Volume49
Issue number5
DOIs
StatePublished - Apr 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science

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