Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (03): 296-299.doi: 10.3866/PKU.WHXB20050314

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Study on the Purification of Onion-like Fullerenes

BAO Hui-Qiang; HAN Pei-De; LI Tian-Bao; JIA Hu-Sheng; LIU Xu-Guang; XU Bing-She   

  1. College of Materials Science and Engineering , Taiyuan University of Technology, Taiyuan 030024
  • Received:2004-07-12 Revised:2004-10-25 Published:2005-03-15
  • Contact: XU Bing-She

Abstract: 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).

Key words: Onion-like fullerenes(OLFs), Vaccum heat-treatment, Oxidation, Purification, Structure