Synthesis of nano onion-like fullerenes by using Fe/Al_2O_3 as catalyst by chemical vapor deposition  

作　　者：LIU XuGuang1,2,WANG CunJing1,2,YANG YongZhen1,3,GUO XingMei1,2,WEN HaiRong1,2 & XU BingShe1,3 1 Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Tech-nology,Taiyuan 030024,China 2 College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China 3 College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China 

出　　处：《Chinese Science Bulletin》2009年第1期137-141,共5页

基　　金：Supported by National Natural Science Foundation of China (Grant Nos.20471041,20676086 and 20673072)

摘　　要：Nano-carbon materials were synthesized by the catalytic decomposition of acetylene at 400℃ by using Fe/Al2O3 as catalyst. The product was refluxed in 36% concentrated HCl at 60℃ for 48 h in order to re-move the catalyst support. The samples were examined by scanning and high resolution transmission electron microscopy,energy dispersive spectroscopy and X-ray diffraction. The results show that nano onion-like fullerenes encapsulating a Fe3C core were obtained. These had a structure of stacked graphitic fragments,with diameters ranging from 15―50 nm. When the product was further heat-treated at 1100℃ for 2 h,nano onion-like fullerenes with a clear concentric graphitic layer structure were obtained. The growth mechanism of nano onion-like fullerenes encapsulating metal cores is suggested to follow a vapor-solid growth model.Nano-carbon materials were synthesized by the catalytic decomposition of acetylene at 400℃ by using Fe/Al2O3 as catalyst. The product was refluxed in 36% concentrated HCI at 60℃ for 48 h in order to remove the catalyst support. The samples were examined by scanning and high resolution transmission electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The results show that nano onion-like fullerenes encapsulating a Fe3C core were obtained. These had a structure of stacked graphitic fragments, with diameters ranging from 15-50 nm. When the product was further heattreated at 1100℃ for 2 h, nano onion-like fullerenes with a clear concentric graphitic layer structure were obtained. The growth mechanism of nano onion-like fullerenes encapsulating metal cores is suggested to follow a vapor-solid growth model.

关 键 词：纳米碳材料 化学蒸发沉积作用 合成 增长机制 

分 类 号：O643.3[理学—物理化学]