Large Scale CVD Synthesis of Single-Walled Carbon Nanotubes
Large Scale CVD Synthesis of Single-Walled Carbon Nanotubes
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DOI：
10.1021/jp990957s
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发表时间：
1999-07
影响因子：
3.3
通讯作者：
A. Cassell;J. Raymakers;J. Kong;H. Dai
中科院分区：
文献类型：
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作者：
A. Cassell;J. Raymakers;J. Kong;H. Dai
大量高质量单壁碳纳米管（SWNT）的合成是通过优化用于甲烷的化学气相沉积（CVD）的催化剂材料的化学组成和纹理特性来实现的。通过系统地改变催化金属化合物和载体材料，得到一系列催化剂。优化的催化剂由负载在新型二氧化硅-氧化铝多组分材料上的Fe/Mo双金属物种组成。高SWNT产率催化剂在升高的温度下表现出高表面积和大的中孔体积。使用优化的催化剂材料，克量的单壁碳纳米管材料已在100.5小时内合成。纳米管材料由单个和成束的SWNT组成，其没有缺陷和无定形碳涂层。这项工作代表了通过简单的CVD路线获得千克级完美的单壁碳纳米管材料的一步。
The synthesis of bulk amounts of high quality single-walled carbon nanotubes (SWNTs) is accomplished by optimizing the chemical compositions and textural properties of the catalyst material used in the chemical vapor deposition (CVD) of methane. A series of catalysts are derived by systematically varying the catalytic metal compounds and support materials. The optimized catalysts consist of Fe/Mo bimetallic species supported on a novel silica−alumina multicomponent material. The high SWNT yielding catalyst exhibits high surface-area and large mesopore volume at elevated temperatures. Gram quantities of SWNT materials have been synthesized in ∼0.5 h using the optimized catalyst material. The nanotube material consists of individual and bundled SWNTs that are free of defects and amorphous carbon coating. This work represents a step forward toward obtaining kilogram scale perfect SWNT materials via simple CVD routes.