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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (8): 1236-1240. 上一篇    下一篇

研究论文

预还原催化剂LaNiO3, La4Ni3O10, La3Ni2O7和La2NiO4 催化分解CH4制碳纳米管 的研究

李贺;梁奇;唐水花;高利珍;陈召勇;张伯兰;于作龙   

  1. 中国科学院成都有机化学研究所.成都(610041)
  • 发布日期:2001-08-15

A study on production of carbon nanotubes by decomposition of CH4 over the pre-reduced catalysts LaNiO3, La4Ni3O10, La3Ni2O7 and La2NiO4

Li He;Liang Qi;Tang Shuihua;Gao Lizhen;Chen Zhaoyong;Zhang Bolan;Yu Zuolong   

  1. Chengdu Inst Organ Chem, CAS.Chengdu(610041)
  • Published:2001-08-15

PDF

638

被引次数

19

通过预还原的LaNiO3,La4Ni3O10,La3Ni2O7和La2NiO4催化分解CH4可以制备大量高度石墨化的碳纳米管。还原前后的催化剂的结构和组分通过X射线衍射(XRD)测定。所制得的碳纳米管由扫描电镜(TEM)、X射线光电子能谱(XPS)表征。碳纳米管在空气在的热氧化性由热重实验(TG)测定。实验结果表明不同催化剂前驱中的La/Ni比会影响碳纳米管的管径分布和石墨化程度。La/Ni比越小，碳纳米管的管径越大，石墨化程度越高。

关键词: 预还原, 催化剂, 复氧化物, 镧化合物, 镍化合物, 分解, 甲烷, 碳纳米管, 石墨化, 纳米相材料

Carbon nanotubes of narrow size distribution can be mass produced in the catalytic decomposition of CH4 over pre-reduced LaNiO3, La4Ni3O10, La3Ni2O7 and La2NiO4. The structure and component of the fresh and reduced LaNiO3, La4Ni3O10, La3Ni2O7 and La2NiO4 were determined by X- ray diffraction (XRD). The carbon nanotubes obtained were characterized by means of transmission electron microscopy (TEM), X- ray photoelectron spectroscopy (XPS). Thermal oxidation of carbon nanotubes in air was performed by thermogravimetric experiment (TG). The results reveral that a lower La/Ni ratio of the catalysts sould lead to a wider diameter distribution and a higher degree of graphitic nature.

Key words: PREREDUCTION, CATALYST, DOUBLE OXIDE, LANTHANUM COMPOUNDS, NICKEL COMPOUNDS, DECOMPOSITION, METHANE, GRAPHITIZATION, NANOPHASE MATERIALS

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