Effect of tungsten on the purification of few-walled carbon nanotubes synthesized by thermal chemical vapor deposition methods

Journal Article (Journal Article)

Few-walled carbon nanotubes (FWNTs) were synthesized by the methane chemical vapor deposition (CVD) method using binary catalysts Co/Mo and Co/W supported on MgO. It was found that Mo was not only a promoter for FWNT growth but also active in the formation of multiwalled carbon nanotubes (MWNTs) in our CVD process. W was found to be a better promoter since it was much less active in producing MWNT impurities. As a result, the raw FWNT materials prepared from W-containing catalysts were much more easily purified than those from Mo-containing catalysts. Scanning electron microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and transmission electron microscopy were used to characterize both raw materials and purified samples. © 2007 American Chemical Society.

Full Text

Duke Authors

Cited Authors

  • Qian, C; Qi, H; Liu, J

Published Date

  • January 11, 2007

Published In

Volume / Issue

  • 111 / 1

Start / End Page

  • 131 - 133

Electronic International Standard Serial Number (EISSN)

  • 1932-7455

International Standard Serial Number (ISSN)

  • 1932-7447

Digital Object Identifier (DOI)

  • 10.1021/jp064139t

Citation Source

  • Scopus