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Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers
Published on: May 13, 2013
Nitrogen-doped carbon nanotubes from amine flames
Lingmin Liao1, Pengfei Fang, Chunxu Pan
1Department of Physics and Center for Electron Microscopy, Wuhan University, Wuhan 430072, China.
Synthesizing nitrogen-doped carbon nanotubes (N-CNTs) from liquid amine flames yields predominantly
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Conventional nitrogen-doped carbon nanotubes (N-CNTs) often exhibit 'pyridine-like' nitrogen structures.
- Chemical vapor deposition (CVD) is a common synthesis method for N-CNTs.
Purpose of the Study:
- To develop a novel flame-based synthesis method for N-CNTs using liquid amines.
- To characterize the structure and properties of N-CNTs synthesized via this new approach.
- To investigate the influence of fuel structure and reaction conditions on N-doping.
Main Methods:
- Flame synthesis using liquid amines (isopropylamine, n-propylamine, n-butylamine).
- Characterization using scanning/transmission electron microscopy, Raman spectroscopy, FTIR, and XPS.
- Growth mechanism simulation and discussion.
Main Results:
- N-CNTs synthesized were dominantly 'graphite-like' in structure, differing from CVD-derived N-CNTs.
- Amine fuel structure and nitrogen content influenced N-CNT quality and doping levels.
- Flame temperature affected the proportion of 'graphite-like' nitrogen, suggesting controllable doping.
Conclusions:
- Flame synthesis using liquid amines is a viable method for producing N-CNTs with a unique 'graphite-like' structure.
- Amine fuel choice and flame temperature offer pathways for controlled nitrogen doping in N-CNTs.
- This method presents an alternative to conventional N-CNT synthesis techniques.
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