Amorphous carbon nanostructures from chlorination of ferrocene

作者：Urones Garrote E; Avila Brande D; Ayape Katcho N; Gomez Herrero A; Landa Canovas AR; Otero Diaz LC^*

来源：Carbon, 2005, 43(5): 978-985.

DOI：10.1016/j.carbon.2004.11.028

• carbon nanotubes
• graphitic carbon
• chemical treatment
• electron microscopy
• electron energy loss spectroscopy

The chlorination of ferrocene at different temperature conditions yields several carbon nanostructures, which were studied by means of transmission and scanning electron microscopies. Amorphous carbon nanotubes (alpha-CNTs) up to 10 mu m long with thick walls and similar to 15 nm of internal diameter were observed in a sample treated at 200 degrees C during 30 min. They consisted on similar to 90%, of carbon, while the remaining 10% consists on iron and chlorine. At this temperature, amorphous carbon bags and open-ended branches were also found. When chlorinating ferrocene at the same temperature but with longer reaction time (180 min), no alpha-CNTs were formed. At higher temperature (300 degrees C, 30 min), amorphous carbon bags were found, with lower content of residual chlorine and iron, and presenting thinner walls. In the sample treated at even higher temperature (900 degrees C, 30 min) the carbon nanobags (wall thickness similar to 12 nm) were almost spherical and more graphitic, and without impurities.

• 出版日期2005