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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Large-scale production of single-wall carbon nanohorns with high purity
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Large-scale production of single-wall carbon nanohorns with high purity

机译：大规模生产高纯度的单壁碳纳米角

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To increase the practical daily capacity to produce single-wall carbon nanohorns (SWNHs) with high purity by CO2 laser ablation of graphite, we made a new three-chamber system composed of a target reservoir, a laser ablation chamber, and a collection chamber. The frequency of exchanging targets was reduced by increasing the target size (diameter, 10 cm; length, 50 cm), and the time taken to exchange targets was reduced by adding an automated exchange mechanism. Most of the SWNHs produced in the laser ablation chamber were immediately swept into the collection chamber by an Ar gas carrier. This avoided the problem of fluffy SWNHs blocking the laser beam irradiating the target and enabled the CO, laser to be operated continuously. The resulting SWNHs had a purity of 92-95% under the optimized conditions of laser power density (1530 kW/cm(2)) and target rotation speed (1 -3 rpm). This increase in purity represents a remarkable improvement on the previous level of 85-90%.- A practical production capacity of 1 kg/day was achieved, which is about 100 times greater than the daily capacity attained by the previous single-chamber system.
机译：为了提高通过CO2激光烧蚀石墨生产高纯度单壁碳纳米角（SWNHs）的实际日产能，我们制作了一个新的三腔系统，该系统由目标容器，激光烧蚀室和收集室组成。通过增加靶标尺寸（直径10 cm;长度，50 cm），可以减少靶标交换的频率，并且通过添加自动交换机制可以减少交换靶标的时间。激光烧蚀室中产生的大多数SWNHs立即被Ar气体载体吹扫到收集室中。这就避免了蓬松的SWNH挡住照射到目标的激光束的问题，并使CO激光器能够连续运行。在优化的激光功率密度（1530 kW / cm（2））和目标转速（1 -3 rpm）的条件下，所得SWNHs的纯度为92-95％。纯度的提高代表了以前水平的85-90％的显着提高。-实现了1千克/天的实际生产能力，这比以前的单腔系统的每日生产能力大了约100倍。

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