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Citation: BAO Hui-Qiang, HAN Pei-De, LI Tian-Bao, JIA Hu-Sheng, LIU Xu-Guang, XU Bing-She. Study on the Purification of Onion-like Fullerenes[J]. Acta Physico-Chimica Sinica, ;2005, 21(03): 296-299. doi: 10.3866/PKU.WHXB20050314 shu

Study on the Purification of Onion-like Fullerenes

1.
College of Materials Science and Engineering , Taiyuan University of Technology, Taiyuan　030024

Received Date: 12 July 2004
Available Online: 15 March 2005

Onion-like fullerenes(OLFs) with an external diameter between 15 nm and 35 nm were prepared by vacuum heat-treatment methods of graphite powers using Al as catalyst. Resultant OLFs were purified by removing impurities using CS₂ treatment and air oxidation method. HRTEM, XRD and TGA are applied to analysize samples before and after purification. The results indicate that CS₂ treatment can effectively remove metal catalyst particles. After the succeeding calcination at 610 ℃ for 200 min in air, most of amorphous carbon and graphite pieces are removed, the purity of the OLFs is above 50％(volume ratio).
- Onion-like fullerenes(OLFs); Vaccum heat-treatment; Oxidation; Purification; Structure
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