高纯度纳米碳管的低温合成

The synthesis of high purity carbon nanotubes at low temperature

以甲醇为碳源,在负载于CaO上的Co催化剂的催化作用下,利用微波等离子体化学气相沉积法低温合成了较高纯度的纳米碳管.经分析认为,等离子体中因甲醇裂解产生的氧离子及含氧基团对无定形碳具有很强的选择性刻蚀能力,为低温合成纳米碳管时提高其纯度创造了条件.

The synthesis of carbon nanotubes (CNTs) at low temperature has been received a great deal of attention. In this paper, using CH 3OH as carbon source, under the catalytic effect of cobalt supported on CaO, CNTs were synthesized by microwave plasma chemical vapor deposition at the temperature of 510 ℃. No carbonaceous particles were found attached on the CNTs in SEM and TEM images. Because of its strong selective etching ability, oxygen ions directly decomposed from CH 3OH plays an important role in the synthesis of pure CNTs.