![](https://d3ilqtpdwi981i.cloudfront.net/Yc9BSgFrw5FdHBZuEFnnksz2Yz4=/425x550/smart/https://bepress-attached-resources.s3.amazonaws.com/uploads/81/c8/ee/81c8ee2b-a6c1-4015-b5f3-2daccd211bf5/thumbnail_BPFile%20object.jpg)
Surface functionalization of multi-walled carbon nanotubes (MWCNTs) was carried out using a gas phase treatment in a Universal Temperature Program (UTP) reactor by flowing SO 3 gas onto the CNTs while being heated at different temperatures. The functionalized nanotubes were characterized using X-ray Fluorescence (XRF), Fourier Transform Infrared Spectroscopy (FT-IR) and Raman spectroscopy. The amount of oxyen and sulfur containing groups was determined by acid-base titration. The titration results were in good agreement with elemental analysis using X-ray fluorescence. FTIR analysis showed the presence of oxygen and sulfur containing groups, S=O, C-S, C=O and-COOH. Raman spectroscopy confirmed that oxygen and sulfur containing acidic groups covalently attached to the sidewall of the MWCNTs.
- carbon nanotubes,
- characterization,
- functionalization,
- sulphur-based surface
Available at: http://works.bepress.com/jean-philippe_tessonnier/6/