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Updated: May 3, 2026

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
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A simple gas-solid route to functionalize ordered carbon.

Meherzad F Variava1, Tamara L Church, Agus Husin

  • 1Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, The University of Sydney , New South Wales, 2006, Australia.

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|February 6, 2014
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Summary
This summary is machine-generated.

Nitric oxide treatment offers a novel method for surface-functionalizing multiwalled carbon nanotubes (MWCNTs), enhancing their surface area by 20% with minimal graphitization loss.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Graphitic carbons react with nitric oxide (NO), forming nitrogen functionalities and undergoing oxidation.
  • Surface functionalization of multiwalled carbon nanotubes (MWCNTs) is crucial for advanced applications.
  • Existing methods for MWCNT modification can lead to significant material loss and graphitization changes.

Purpose of the Study:

  • To develop a facile method for surface-functionalizing MWCNTs using nitric oxide (NO).
  • To investigate the impact of NO treatment on the physical and chemical properties of MWCNTs.
  • To evaluate the performance of NO-treated MWCNTs as supports for nanoparticle deposition.

Main Methods:

  • Industrial MWCNTs were treated with nitric oxide (NO).
  • Physical properties (specific surface area - SBET) and chemical properties (nitrogen content) were analyzed.
  • Degree of graphitization and material loss were quantified.
  • Nickel (Ni) nanoparticles were deposited on untreated, acid-treated, and NO-treated MWCNTs for comparison.

Main Results:

  • NO treatment increased the specific surface area (SBET) of MWCNTs by approximately 20%.
  • The treatment resulted in minimal loss of material (~12 wt %) and preserved the degree of graphitization.
  • Nitrogen functional groups were successfully grafted onto the MWCNT surfaces (1.1 at.%).
  • MWCNTs treated with NO supported smaller Ni nanoparticles (dNi = 13.1 nm) compared to untreated MWCNTs (dNi = 18.3 nm).

Conclusions:

  • NO treatment presents a novel, efficient, and mild route for surface-functionalizing MWCNTs.
  • This method enhances MWCNT surface area and improves their suitability as supports for metal nanoparticles.
  • The NO treatment offers advantages over traditional gas-based activation techniques in terms of material loss and property preservation.