Synthesis of cobalt oxide aerogels and nanocomposite systems containing single-walled carbon nanotubes

Simerjeet K. Gill, Andrew M. Shobe, Louisa J. Hope-Weeks

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The synthesis and characterization of porous nanostructured cobalt oxide (Co3O4) aerogels using epoxide addition method is described. Cobalt-containing monoliths were obtained by sol-gel processing of an alcoholic cobalt chloride solution with propylene oxide as the gelation agent. The alcogels were dried by supercritical CO2 fluid extraction to obtain the highly porous amorphous cobalt (II) aerogels. To enhance and control the structural properties of the aerogels, single-walled carbon nanotubes (SWCNT) were incorporated into the cobalt (II) aerogel network to form a homogenous composite material. The resulting materials were characterized using powder X-ray diffraction and nitrogen adsorption/desorption analysis. The detailed microstructure of aerogel networks was investigated using scanning and transmission electron microscopy, which showed significant structural changes induced by the incorporation of SWCNT to the cobalt aerogel. Annealing of the aerogel materials at 600°C yields a highly crystalline well-faceted Co 3O4 network.

Original languageEnglish
Pages (from-to)132-138
Number of pages7
JournalScanning
Volume31
Issue number3
DOIs
StatePublished - May 2009

Keywords

  • Aerogel
  • Cobalt oxide
  • Nanocomposite
  • Single-walled carbon nanotubes
  • Sol-gel

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