Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 15, Pages 7811-7817Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp311137t
Keywords
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Funding
- NSFC [21173114, 51232003, 21203092, 21173115]
- 973 Program [2013CB932902]
- National Science Fund for Talent Training in Basic Science [J1103310]
- Jiangsu Provincial Natural Science Foundation [BK2010304]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
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Nitrogen-doped carbon nanotubes (NCNTs) have been catalytically synthesized from five different nitrogen-containing aromatic precursors by injection chemical vapor deposition (CVD) in the temperature range of 550-850 degrees C. The doped nitrogen mainly exists as pyridinic or graphitic nitrogen with the total content of 2-9 at. % depending on the precursor and preparation condition. Over 60% carbon and nitrogen atoms could be converted to NCNTs products for all the precursors, indicating the high efficiency and potential for scale-up of the injection CVD method. The oxidation processes of the NCNTs products have been illustrated in detail with the in situ thermogravimetry-differential scanning calorimetry-mass spectrum coupling technique, and the results clearly indicate the successful incorporation of nitrogen into the nanotubes as supported by X-ray photoelectron spectroscopy. There is a dependent correlation between the pre-existing C-N bond in the precursor and the N incorporation in the corresponding NCNTs product. This suggests a general preparation strategy of NCNTs for scale-up and regulation of nitrogen content and status.
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