Synthesis, Photoluminescence, and Magnetic Properties of Nitrogen-Doping Helical Carbon Nanotubes

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• 作者：Jianfeng Wen ; Yang Zhang ; Nujiang Tang ; Xiangang Wan ; Zhuhong Xiong ; Wei Zhong ; Zhenlin Wang ; Xinglong Wu ; Youwei Du
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：June 30, 2011
• 年：2011
• 卷：115
• 期：25
• 页码：12329-12334
• 全文大小：946K
• 年卷期：v.115,no.25(June 30, 2011)
• ISSN：1932-7455

文摘

Over Ni nanoparticles generated by means of a combined sol鈥揼el/reduction method, helical carbon nanotubes (HCNTs) were synthesized in acetylene pyrolysis at 425 掳C. By annealing the pristine HCNTs in NH₃ atmosphere, the N-doped HCNTs were obtained. The dependence of annealing temperature on the nitrogen content and doping type of the N-doped HCNTs was studied. The photoluminescence (PL) properties of the pristine HCNTs and N-doped HCNTs were examined systematically at room temperature (RT). The results demonstrated that the pristine HCNTs exhibit strong ultraviolet (UV) PL at 368 nm. By doping the pyridinic and graphitic N into the pristine HCNTs, the UV PL could be enhanced. Moreover, the magnetic properties of the pristine and N-doped HCNTs have been measured.