A new design of fully automatic system was built up to produce multiwalled carbon nanotube (MWCNT) using arc discharge technique in deionized water and extra pure graphite multiple electrodes (99.9% pure). The goal of the experimental research is to determine the yield of CNT in two different cases: (a) single plasma electrodes and (b) multiplasma electrodes, particularly 10 electrodes. The experiments were performed at constant parameters (75 A, 238 V). The obtained CNT was examined by scanning electron microscope (SEM), transmission electron microscope (HRTEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the produced CNT is of type MWCNT, with a diameter of 5 nm, when using multiplasma electrodes and 13 nm when using single plasma electrodes. The yield of MWCNT was found to be 320% higher in case of comparing multielectrodes to that of single plasma electrodes. Under the experimental test conditions, a yield of 0.6 g/hr soot containing 40% by mass nanotube was obtained in case of single plasma electrodes and above 60% in case of multiplasma electrodes.
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机译：利用去离子水和超纯石墨多电极（纯度为99.9％）中的电弧放电技术，建立了一种新型的全自动系统，以生产多壁碳纳米管（MWCNT）。实验研究的目的是确定两种不同情况下的CNT产量：（a）单等离子体电极和（b）多等离子体电极，尤其是10个电极。实验在恒定参数（75 A，238 V）下进行。通过扫描电子显微镜（SEM），透射电子显微镜（HRTEM），X射线衍射（XRD）和热重分析（TGA）检查获得的CNT。结果显示，所产生的CNT是MWCNT类型的，当使用多等离子体电极时直径为5nm，而当使用单等离子体电极时直径为13nm。如果将多电极与单等离子体电极进行比较，发现MWCNT的产率提高了320％。在实验测试条件下，对于单等离子体电极，获得的烟灰收率为0.6 g / hr，其中碳纳米管的含量为40％，对于多等离子体电极，为60％以上。
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