Synthesis, characterization and sorption studies of nitrogen–doped carbon nanotubes

A. O. Osikoya, D. Wankasi, R. M.K. Vala, C. W. Dikio, A. O. Afolabi, N. Ayawei, E. D. Dikio

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Abstract

Nitrogen doped carbon nanotubes were synthesized using cobalt and silver co-catalyst on magnesium oxide support. Their morphological features were studied using Raman spectroscopy, energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction spectroscopy. Equilibrium and thermodynamic batch sorption experiments were carried using concentration, time and temperature effects respectively. The morphological images showed amorphous multiwall nanotubes with crystalline regions that are attributable to the doping of carbon nanotube with nitrogen. The sorption studies indicated a rapid uptake of Cr3+ by the nitrogen doped carbon nanotubes which was mainly diffusion controlled. The thermodynamic study suggests relatively low temperature (low energy) favoured sorption which is exothermic with a physic-sorption mechanism.

Original languageEnglish
Pages (from-to)125-134
Number of pages10
JournalDigest Journal of Nanomaterials and Biostructures
Volume10
Issue number1
Publication statusPublished - Jan 1 2015

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All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Osikoya, A. O., Wankasi, D., Vala, R. M. K., Dikio, C. W., Afolabi, A. O., Ayawei, N., & Dikio, E. D. (2015). Synthesis, characterization and sorption studies of nitrogen–doped carbon nanotubes. Digest Journal of Nanomaterials and Biostructures, 10(1), 125-134.