纳米金属微粒催化制备的洋葱状富勒烯的结构表征

王晓敏; 许并社; 刘旭光; 市野濑英喜

纳米金属微粒催化制备的洋葱状富勒烯的结构表征

太原理工大学材料科学与工程学院,山西太原 030024; 2.东京大学工学部材料系,日本东京 113-0033

详细信息

通讯作者:
许并社

中图分类号: TB383, TQ127.1
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出版历程
- 收稿日期: 2004-05-09
- 录用日期: 2004-09-20
- 修回日期: 2004-07-12
- 刊出日期: 2004-09-20

纳米金属微粒催化制备的洋葱状富勒烯的结构表征

College of Materials Science and Engineering,Taiyuan University of Technology, Taiyuan 030024,China; 2.Department of Materials Science,The University of Tokyo, Tokyo 113-0033,Japan

More Information

Corresponding author: XU Bing-she

摘要

摘要: 采用金属Cu，Al微粒/石墨混合材料，用直流电弧放电方法制备了洋葱状富勒烯。对两种产物进行了XRD、SEM、HRTEM和Raman结构表征。结果表明：两种纳米金属微粒均可催化得到洋葱状富勒烯；所得产物中有单纯洋葱状富勒烯和内包纳米金属微粒洋葱状富勒烯，且石墨化程度都很高；纳米金属微粒尺寸大小不同决定洋葱状富勒烯的直径分布不均匀，从而造成其拉曼谱峰相对于石墨特征峰1582cm-1发生了频移；用汽-液-固（VLS）生长模型描述了洋葱状富勒烯生长机理，解释了汽态碳原子通过在液态催化剂中扩散和析出，逐渐长大成形的现象。
- 洋葱状富勒烯 /
- 纳米金属微粒 /
- 结构表征 /
- VLS生长模型
Abstract: Onion-like Fullerenes (OFs) were synthesized by an arc-discharge technique, with different metal nanoparticles as catalysts. The microstructure of the products was characterized and analysed by XRD, SEM, HRTEM and Raman spectroscopy. Results indicated that two kinds of OFs can be prepared in the presence of metal nanoparticle catalysts: 1) individual OFs and 2) OFs encapsulating metal nanoparticles. The structure of OFs with a high degree of graphitization were shown to be similar to graphite. The diameters of OFs were unevenly distributed because of the effect of the size of the metal nanoparticles, which caused Raman spectra showing a frequency shift. A vapour-liquid-solid growth model was used to explain some experimental phenomena during OF formation.
- Onion-like Fullerenes(OFs) /
- Metal nanoparticles /
- Characterization /
- VLS growth model