电弧法制备洋葱状富勒烯的工艺研究

The preparation of nano-onion-like fullerencs by arc discharge

运用纳米Bi2O3微粒作催化剂,在电弧放电条件下,进行了纳米洋葱状富勒烯大量合成的研究。并用透射电镜对产物的形貌、结构进行了观察与分析。结果表明:纳米洋葱状富勒烯的石墨化程度很高,且直径均匀(约为25nm),结构较完善;同时伴有单核纳米洋葱状富勒烯向多核纳米洋葱状富勒烯的转变。为洋葱状富勒烯的宏量制备提供了有利线索。

The synthesis of nano-onion-like fullerenes on a large scale by the arc discharge method was investigated using Bi2O3 as catalyst. Transmission electron microscopy was used to characterize the morphologies and microstructures of the product. Results indicated that the nano-onion-like fullerenes were perfectly structured and highly graphitized, with uniform external diameter of about 25 nm. Two kinds of nano-onion-like fullerenes were obtained: 1) Single-nuclei onion-like fullerenes; 2) Multiple-nuclei onion-like fullerenes. The investigation pointed to a possible routine for large scale synthesis of onion-like fullerenes.