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Preparation of N-Doped Long Bamboo-Like Carbon Nanotubes and Their Growth Mechanism

Articles

Journal/Conference:

CHINESE JOURNAL OF INORGANIC CHEMISTRY

Language:

English

Author:

Li Ling; Lin Kui; Cui Lan; Chen XiaoPing; Zhang LiShuang; Shah Sayyar Ali; Cui Shen

Experts:

Zhang Fan; Wang Hui

Year:

2014

Volume:

30

Issue:

5

Pages:

1097-1103

Keywords:

arc-discharge; N-doped; long bamboo-like carbon nanotubes; coevaporation; growth mechanism

N-doped long bamboo-like carbon nanotubes(NDLBLCNTs) were prepared by DC arc-discharge with the coevaporation of anode and stainless steel sheet (SSS). The morphology, structure, and composition of the products were characterized by using scanning electron microscope (SEM), field emission high resolution transmission electron microscope (HRTEM), energy dispersive X-ray (EDX) spectrometer, electron energy loss spectroscopy (EELS), and transmission electron microscope (TEM). The results show that the lengths of the NDLBLCNTs are between 640 nm and 835 nm, the inner diameters are in the range of 23 similar to 35 nm, and the outer diameters are in the range of 28 similar to 47 nm. In each of the inner cavities formed at the “bamboo joints” there is a black nanoparticle. Both the diameters of such black nanoparticles and the content of NDLBLCNTs in the product are related with the melted and evaporated area of the SSS. The temperature gradient between the SSS and the center of arc discharge zone is about 87.5 similar to 94.4 degrees C.mm(-1). The coevaporation of the SSS together with the anode is the sufficient and necessary condition for the formation NDLBLCNTs. The growth mechanism of the NDLBLCNTs is discussed briefly.