| INTERACTION-MEDIATED GROWTH OF CARBON NANOTUBES ON ACICULAR SILICA-COATED a-Fe CATALYST BY CHEMICAL VAPOR DEPOSITION BY CHEMICAL VAPOR DEPOSITION |
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| 作者姓名： | Qixiang Wang* Guoqing Ning Fei Wei and Guohua Luo |
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| 作者单位： | Qixiang Wang*，Guoqing Ning，Fei Wei and Guohua Luo Department of Chemical Engineering，Tsinghua University，Beijing 100084，P. R. China *Author to whom correspondence should be addressed. |
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| 摘 要： | 1. Introduction Carbon nanotubes (CNTs), a kind of the most advanced nanomaterials with novel properties and promising for many applications, have aroused great interest of the world in a number of research fields (Iijima, 1991; Baughman et al., 2002; Iijima & Ichihashi, 1993; Rao & Govindaraj, 2002; Rueckes et al., 2000; Adrian et al., 2001; Javey et al., 2003). Catalytic chemical vapor deposition (CCVD) is re-garded as the most suitable method for the preparation of microstructured CN…
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INTERACTION-MEDIATED GROWTH OF CARBON NANOTUBES ON ACICULAR SILICA-COATED a-Fe CATALYST BY CHEMICAL VAPOR DEPOSITION |
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| Qixiang Wang*,Guoqing Ning,Fei Wei and Guohua Luo.INTERACTION-MEDIATED GROWTH OF CARBON NANOTUBES ON ACICULAR SILICA-COATED a-Fe CATALYST BY CHEMICAL VAPOR DEPOSITION BY CHEMICAL VAPOR DEPOSITION[J].China Particuology,2003(6). |
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| Authors: | Qixiang Wang Guoqing Ning Fei Wei and Guohua Luo |
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| Institution: | Qixiang Wang*,Guoqing Ning,Fei Wei and Guohua Luo Department of Chemical Engineering,Tsinghua University,Beijing 100084,P. R. China *Author to whom correspondence should be addressed. |
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| Abstract: | Multi-walled carbon nanotubes (MWNTs) with 20 nm outer diameter were prepared by chemical vapor deposition of ethylene using ultrafine surface-modified acicular a-Fe catalyst particles. The growth mechanism of MWNTs on the larger catalyst particles are attributed to the interaction between the Fe nanoparticles with the surface-modified silica layer. This interaction-mediated growth mechanism is illustrated by studying the electronic, atomic and crystal properties of surface-modified catalysts and MWNTs products by characterization with X-ray diffraction (XRD), transmis-sion electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), thermal gravimetric analy-sis (TGA) and Raman spectra. |
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| Keywords: | carbon nanotubes surface modification growth mechanism |
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