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	Production of high quality single-walled carbon nanotubes in a nano-agglomerated fluidized bed reactor
	Qixiang Wang ; Guoqing Ning ; Fei Wei ; Guohua Luo
	2010-05-07 ; 2010-05-07
会议名称	Materials and Devices for Smart Systems Symposium (Mater. Res. Soc. Symposium Proceedings Vol.785) ; Materials and Devices for Smart Systems Symposium ; Boston, MA, USA ; INSPEC
关键词	Experimental/ carbon nanotubes catalysis catalysts chemical vapour deposition crystal microstructure dissociation fluidisation fluidised beds nanoparticles powders Raman spectra scanning electron microscopy transmission electron microscopy turbulence/ single-walled carbon nanotubes nanoagglomerated fluidized bed reactor catalytic chemical vapor deposition hydrocarbon decomposition catalysts nanoparticles carrier gas turbulent fluidization catalysts powders amorphous carbon microstructure high resolution transmission electron microscopy scanning electron microscopy Raman spectra 150 g 0.9 to 1.8 nm C Fe MgO/ A8120V Preparation of fullerenes and fullerene-related materials, intercalation compounds, and diamond A8120E Powder techniques, compaction and sintering A8115H Chemical vapour deposition A7865V Optical properties of fullerenes and related materials (thin films/low-dimensional structures) A7830G Infrared and Raman spectra in inorganic crystals A6148 Structure of fullerenes and fullerene-related materials A6146 Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials A8230L Decomposition reactions (pyrolysis, dissociation, and group ejection) A8265J Heterogeneous catalysis at surfaces and other surface reactions A6855 Thin film growth, structure, and epitaxy/ mass 1.5E-01 kg size 9.0E-10 to 1.8E-09 m/ C/el Fe/el MgO/sur Mg/sur O/sur MgO/bin Mg/bin O/bin
中文摘要	Single-walled carbon nanotubes (SWNTs) have attracted much attention due to their unique structural, mechanical, chemical, and electrical properties. Catalytic chemical vapor deposition (CCVD) through decomposition of hydrocarbons is one of the most challenging synthesis methods to produce SWNTs in large scale. In this paper, high quality SWNTs prepared in a nano-agglomerated fluidized bed reactor (NAFBR) was reported. The reactor is a vertical quartz tube with the inner diameter of about 50 mm. Catalysts nanoparticles used for the production of SWNTs were prepared with Fe metal nanoparticles carried on the surface of MgO. About 150 g catalysts powders were loaded on the gas distribution grid. The reaction temperature was controlled at not less than 1123 K. The carrier gas of argon was used to maintain turbulent fluidization of the catalysts powders in FBR. The hydrogen gas was used to reduce the catalysts and to synergize the growth of SWNTs with methane. The powder products were spherical agglomerates of SWNTs bundles tangling with the catalysts particles. By optimizing the process parameters of CCVD, the products of SWNTs with the diameter about 0.9-1.8 nm were prepared, without any multi-walled carbon nanotubes (MWNTs) or amorphous carbon. The microstructure of SWNTs products were characterized by the methods of high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), Raman spectra, etc. The NAFBR is a commercially viable (effective and continuous production at a low cost) process for the production of SWNTs.
会议录出版者	Mater. Res. Soc ; Warrendale, PA, USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/17139]
专题	清华大学
推荐引用方式 GB/T 7714	Qixiang Wang,Guoqing Ning,Fei Wei,et al. Production of high quality single-walled carbon nanotubes in a nano-agglomerated fluidized bed reactor[C]. 见:Materials and Devices for Smart Systems Symposium (Mater. Res. Soc. Symposium Proceedings Vol.785), Materials and Devices for Smart Systems Symposium, Boston, MA, USA, INSPEC.

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