Fluidized-bed synthesis of sub-millimeter-long single walled carbon nanotube arrays
Fluidized-bed synthesis of sub-millimeter-long single walled carbon nanotube arrays
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DOI：
10.1016/j.carbon.2011.11.032
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发表时间：
2012-04-01
期刊：
影响因子：
10.9
通讯作者：
Noda, Suguru
中科院分区：
文献类型：
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作者：
Kim, Dong Young;Sugime, Hisashi;Noda, Suguru
将垂直排列单壁碳纳米管（SWCNT）阵列的快速生长方法应用于流化床，利用陶瓷珠作为催化剂载体，批量生产亚毫米长的SWCNT阵列。采用溅射法在Al2O3微球表面沉积Fe/ al2o催化剂，并以C2H2为原料，采用化学气相沉积（CVD）法在微球表面生长SWCNTs。扫描电镜和透射电镜显示，直径为2 ~ 4 nm的SWCNTs生长并形成高度为0.5 mm的垂直排列阵列。热重分析表明，SWCNTs的催化剂杂质含量低于1 wt.%。此外，它们的合成碳产率高达65 at。%的气体停留时间短于
The rapid growth method for vertically aligned, single walled carbon nanotube (SWCNT) arrays on flat substrates was applied to a fluidized-bed, using ceramic beads as catalyst supports as a means to mass produce sub-millimeter-long SWCNT arrays. Fe/Al2Ox catalysts were deposited on the surface of Al2O3 beads by sputtering and SWCNTs were grown on the beads by chemical vapor deposition (CVD) using C2H2 as a feedstock. Scanning electron microscopy and transmission electron microscopy showed that SWCNTs of 2-4 nm in diameter grew and formed vertically aligned arrays of 0.5 mm in height. Thermogravimetric analysis showed that the SWCNTs had a catalyst impurity level below 1 wt.%. Furthermore, they were synthesized at a carbon yield as high as 65 at.% with a gas residence time as short as