熱化學氣相沉積法合成單層碳奈米管

Synthesis of Single-Walled Carbon Nanotubes by Thermal Chemical Vapor Deposition

黃建良 ； 江日舜 ； 莊銓 ； 丁傑

《化工》 49卷1期 (2002/02) Pp. 60-66

https://doi.org/10.29803/CE.200202.0008

摘要

本研究利用沉積沉澱法製備高活性Co/MgO 載體觸媒, 在900°C 下以此觸媒進行熱化學氣相沉積反應, 將甲烷轉化為單層碳奈米管( SWNTs)。產物經HRTEM 與拉曼光譜儀雙重確認, 所合成SWNTs 之管徑分佈主要集中於1.4 到2.6 奈米之間, 平均管徑為2 奈米。這樣的平均管徑比已知的CVD技術所得者更大,而且管徑分佈範圍卻更狹窄集中。

關鍵字

熱化學氣相沉積 ； 單層碳奈米管(SWNTs) ； 載體觸媒

並列摘要

In this study, a highly active Co/MgO supported catalyst is prepared by deposition precipitation. Employing such a catalyst, a thermal chemical vapor deposition is then con-ducted at 900°C in order to convert methane into single-walled carbon nanotubes (SWNTs). Carefully verified with HRTEM and Raman spectroscopy, the major diameters of these SWNTs are between 1.4 and 2.6 nm and the average diameter is around 2 nm. This average diameter is larger than that from the other current CVD techniques and the region of diameter distribution is even narrower.

並列關鍵字

thermal chemical vapor deposition ； single-walled carbon nanotubes (SWNTs) ； supported catalysts