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摘要: 以太西无烟煤为碳源，以稀土氧化物La2O3和过渡金属Ni为催化剂制备复合的煤基炭棒，采用直流电弧放电技术，成功实现了单壁纳米碳管绳的批量制备。用TEM和Raman光谱技术对纳米碳管绳产品进行了分析表征。结果表明：太西煤是制备单壁纳米碳管的合适碳源；电弧放电得到的煤基单壁纳米碳管的直径分布在2.01nm~1.80nm之间；双金属催化剂Ni-La在单壁纳米碳管的形成过程中存在协同作用，其催化活性优于其中的单一组分。Abstract: Single-walled carbon nanotube ropes (SWCNTRs) were successfully fabricated on a large scale from coal-based composite carbon electrodes using the arc discharge method. The SWCNTRs obtained were characterized by TEM and Raman spectroscopy. Results show that the Taixi coal used in the present work is a suitable carbon source for the synthesis of high purity SWCNTRs in the presence of catalysts such as La and Ni. The diameter distribution of the obtained SWCNTRs varies from 1.80 to 2.01nm and the bimetal La/Ni catalyst plays a synergetic role in the catalytic synthesis of SWCNTRs.
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Key words:
- Single-walled carbon nanotubes /
- Coal /
- Arc discharge /
- TEM /
- Raman
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