| Diameter-Controlled Growth of Carbon Nanotubes Through Pyrolysis of Acetylene Using Rare Earth Alloy as Catalyst in Hydrogen |
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| 作者姓名： | 朱燕娟 陈玉莲 陈建 林天津 张春华 刘秋香 张海燕 |
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| 作者单位： | Department of Applied Physics，Guangdong University of Technology，Guangzhou 510090，China，Department of Applied Physics，Guangdong University of Technology，Guangzhou 510090，China，Instrumentation Analysis and Research Center，Zhongshan University，Guangzhou 510275，China，Department of Applied Physics，Guangdong University of Technology，Guangzhou 510090，China，Department of Applied Physics，Guangdong University of Technology，Guangzhou 510090，China，Department of Applied Physics，Guangdong University of Technology，Guangzhou 510090，China，Faculty of (Materials) and Energy，Guangdong University of Technology，Guangzhou 510643，China |
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| 基金项目： | ProjectssupportedbytheNationalNaturalScienceFoundationofChina(5 0 3 72 0 13 )andtheGuangdongProvinceNaturalScience
FoundationofChina(2 0 0 10 0 2 6，0 0 40 0 9487) |
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| 摘 要： | Carbonnanotubes1] (CNTs)havenovelquasione dimensionhollowstructurewithsmalldensity ,largeratioofsurfacetovolume ,highmechanicalstrength ,goodconductivityandchemicalstability .CNTshavepotentialapplicationsinmakingcatalystcarrier ,fabricatingnanoelectronics ,manufacturinghigh densityenergystoragematerial ,constructinghigh strengthcompositematerial ,andpreparingelec tromagneticwaveabsorptionmaterial2～ 8] .InordertostudytheperformanceandapplicationofCNTs ,itisimportanttofindouthowtosynthesiz…
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| 关 键 词： | 催化高温分解 碳纳米管 参数控制 生长工艺 稀土元素合金 |
Diameter-Controlled Growth of Carbon Nanotubes Through Pyrolysis of Acetylene Using Rare Earth Alloy as Catalyst in Hydrogen |
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| Zhu Yanjuan.Diameter-Controlled Growth of Carbon Nanotubes Through Pyrolysis of Acetylene Using Rare Earth Alloy as Catalyst in Hydrogen[J].Journal of Rare Earths,2004,22(6):859-863. |
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| Authors: | Zhu Yanjuan |
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| Abstract: | High-purity carbon nanotubes(CNTs)were synthesized in hydrogen ambience by CVD method by using rare earth alloy MlM5-1.35(CoAlMn)1.35 as catalyst, acetylene as carbon source. The influence of hydrogen flow rate on the diameter, shape, purity, graphitization degree and output of carbon nanotubes was systematically studied by scanning selectronic microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD)and Raman technique. The results indicate that the size of MlM alloy particles changed from μm order into nm order during the process of hydrogen reduction. While no introducing hydrogen in the reaction of acetylene and catalyst, CNTs can also be synthesized on the catalyst. The CNTs are short and thick with average diameter of about 97.8 nm, and the wall of CNTs is also thick and rough. With increasing of hydrogen flow rate, the diameter of CNTs first decrease and then increase, while the output, purity, and graphitization degree first increase and then decrease. The optimized conditions are: CNTs reach its narrowest size with diameter of 49.1 nm when hydrogen flow rate is 50 ml·min-1. The purity, graphitization degree, and output of CNTs reach highest and largest when hydrogren flow rate is 75 ml·min-1. It has the most uniform tube size of 97.38 nm when hydrogen flow rate is 100 ml·min-1. |
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| Keywords: | catalytic pyrolysis CNTs controllable diameter rare earth |
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