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High-yield production of quasi-aligned carbon nanotubes by catalytic decomposition of benzene

机译：苯催化分解高产准取向碳纳米管

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摘要

High-yield production of quasi-aligned carbon nanotube (CNT) bundles is presented. Benzene was used as the precursor for this catalytic process at a moderate temperature of 650 deg C over y -Al_2O_3-supported Fe-Ni alloy catalysts with different mole ratios. The maximum yield of high-quality CNTs per hour is even greater than 350 percent for the optimized catalyst. The products were characterized by thermal gravimetry/differential scanning calorimetry and high-resolution transmission electron microscopy. The results indicated that the products are well graphitized with tube diameters of about 20 nm. Three typical morphologies of the end parts of the CNTs were identified as the open end capped with an Fe-Ni catalyst, the open end without catalyst and the closed end, respectively. A hexagonal carbon-cluster-based growth for this synthesis is suggested.
机译：提出了准对准碳纳米管（CNT）束的高产量生产。在y -Al_2O_3负载的Fe-Ni合金催化剂（摩尔比不同）上，在650℃的中等温度下，苯用作该催化过程的前体。对于优化的催化剂，每小时高质量CNT的最大产量甚至超过350％。通过热重量分析/差示扫描量热法和高分辨率透射电子显微镜对产物进行表征。结果表明产物被很好地石墨化，管直径为约20nm。 CNT的末端部分的三种典型形态被鉴定为分别被Fe-Ni催化剂覆盖的开口端，没有催化剂的开口端和封闭端。建议用于该合成的六方碳簇基生长。

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