Structural and Compositional Regulation of Nitrogen-Doped Carbon Nanotubes with Nitrogen-Containing Aromatic Precursors

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• 作者：Guoqiang Jian ; Yu Zhao ; Qiang Wu ; Lijun Yang ; Xizhang Wang ; Zheng Hu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：April 18, 2013
• 年：2013
• 卷：117
• 期：15
• 页码：7811-7817
• 全文大小：432K
• 年卷期：v.117,no.15(April 18, 2013)
• ISSN：1932-7455

文摘

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鈥?50 掳C. The doped nitrogen mainly exists as pyridinic or graphitic nitrogen with the total content of 2鈥? 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鈥揹ifferential scanning calorimetry鈥搈ass 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鈥揘 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.