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利用直流电弧等离子体方法,以Ho/Ni作为催化剂合成了单壁碳纳米管,借助扫描电子显微镜、拉曼光谱和热重分析方法对所合成的单壁碳纳米管的形貌、结构以及含量进行了表征。电镜观察以及热重分析表明,收集到的大量网状物中单壁碳纳米管含量较高;不同激发波长拉曼测量表明碳纳米管直径分布比较集中,在1.35nm~1.69nm范围,且直径为1.5nm的碳纳米管占多数;与Ce/Ni等作为催化剂合成的单壁碳纳米管的直径分布不同。研究结果表明,Ho/Ni对于合成单壁碳纳米管具有很好的催化效果且影响管径分布,元素Ho对单壁碳纳米管的形成起到了重要的作用。
Single-walled carbon nanotubes were synthesized by direct current arc plasma method with Ho / Ni as catalyst. The morphology, structure and content of single-walled carbon nanotubes synthesized by scanning electron microscopy, Raman spectroscopy and thermal gravimetric analysis Characterized. Electron microscopy and thermogravimetric analysis showed that a large amount of single-walled carbon nanotubes were collected in a large number of meshes. The Raman measurements at different excitation wavelengths showed that the diameter distribution of carbon nanotubes was concentrated in the range of 1.35 nm to 1.69 nm and the diameters 1.5nm carbon nanotubes accounted for the majority; and Ce / Ni as a catalyst for the synthesis of single-walled carbon nanotubes with different diameter distribution. The results show that Ho / Ni has a good catalytic effect on the synthesis of single-walled carbon nanotubes and affects the diameter distribution. The elemental Ho plays an important role in the formation of single-walled carbon nanotubes.