Effect of Hydrogen Fluoride Addition and Synthesis Temperature on the Structure of Double-Walled Carbon Nanotubes Fluorinated by Molecular Fluorine

Yuliya V. Fedoseeva, Marc Dubois, Emmanuel Flahaut, Oleg Yu Vilkov, Andrey Chuvilin, Igor P. Asanov, Alexander V. Okotrub, Lyubov G. Bulusheva

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Double-walled carbon nanotubes (DWCNTs) have been fluorinated by pure molecular fluorine (F2) at room temperature or 200 °C and a mixture of F2 with hydrogen fluoride (HF) at 200 °C that resulted in products with compositions of CF0.12, CF0.39, and CF0.53 as determined by X-ray photoelectron spectroscopy. The differences in the structures of three kinds of fluorinated DWCNTs were revealed using transmission electron microscopy, Raman scattering, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. Quantum-chemical modeling of the NEXAFS F K-edge spectra detected a change in the fluorine pattern with the increase of the F2 treatment temperature. The presence of HF in fluorine gas was found to accelerate the fluorination process and cause a partial destruction of outer shells of the DWCNTs.

Original languageEnglish
Article number1700261
Number of pages6
JournalPhysica Status Solidi (B) Basic Research
Volume255
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • double-walled carbon nanotubes
  • fluorination
  • HF
  • NEXAFS
  • X-ray photoelectron spectroscopy
  • DENSITY
  • ENERGY
  • RAMAN-SPECTROSCOPY
  • GRAPHITE

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