无定形纳米碳管的合成、表征及其纯化后的电化学性能

以焦粉制备的碳棒为碳源，以镍为催化剂，在负压条件下，于乙炔和氦气气氛中，采用电弧法合成了无定形纳米碳管（ACNT）。利用扫描电镜、透射电镜，X-射线衍射仪和拉曼光谱对产物进行表征。采用微波辅助硝酸纯化法对制备的ACNT进行纯化，并进一步在空气中纯化。用纯化后的纳米碳管修饰碳糊电极，利用循环伏安法测试了电极的电化学性能。结果表明，电极具有良好的电化学稳定性，ACNT管壁上的羟基基团被氧化而减少，导致无定形纳米碳管／碳糊电极电子传递速度减慢。

The Synthesis of Amorphous Carbon Nanotubes and its Electrochemical Performance

Amorphous carbon nanotubes (ACNTs) were firstly synthesized with carbon rod as anode from coke powder using Ni as catalyst in He and C2H2 medium at negative pressure by the arc discharge. ACNTs were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction and Raman spectrum. ACNTs were purified via microwave-assisted nitric acid oxidation and air oxidation to obtain the purified CNTs. The electrochemical performance of the purified CNTs/carbon paste elec...