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<p>In this work, MWCNTs were synthesized using the experimental pulsed electric arc discharge with a spinning anode (PEADSA) method. The configuration of the spinning anode such as the angular velocity and geometry was controlled by changing the electric discharge frequency and the discharge time. The catalytic mixture was rich in elemental sulfur containing 93.84/2.56/1.43/0.69/1.48 of C/Ni/Fe/Co/S and reduced H<sub>2</sub> pressure was used. The catalytic mixture was placed in the reactor in 16 alternating cavities (eight filled and eight empty). Two types of MWCNTs were synthesized depending on the electrode. Mainly MWCNTs with an average diameter of 60 ± 8 nm and length of 2.5 ± 0.7 µm were observed at the anode. On the other hand, MWCNTs of diameter of 58 ± 6 nm and length of 4.1 ± 1.2 µm were seen at the cathode. It was found that the nanotubes were decorated with CS<sub>2</sub> having round shapes with an average size of 20 ± 4 nm due to the S and C atoms interacting to create topological defects in the carbon nanostructures. Raman spectroscopy and electron scanning and transmission microscopy were used for nanostructures characterization. The PEADSA method represents a promising alternative for different MWCNTs structures in applications as semiconducting material.</p>

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MWCNT synthesized by the PEADSA method decorated with CS2 for energy storage systems

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • David Saucedo-Jimenez,
  • José Luis Jiménez-Pérez,
  • Alejandro González-Cisneros,
  • Carlos Couder-Castañeda,
  • José Luis Luna-Sánchez,
  • Diego Alfredo Padilla-Pérez

摘要

In this work, MWCNTs were synthesized using the experimental pulsed electric arc discharge with a spinning anode (PEADSA) method. The configuration of the spinning anode such as the angular velocity and geometry was controlled by changing the electric discharge frequency and the discharge time. The catalytic mixture was rich in elemental sulfur containing 93.84/2.56/1.43/0.69/1.48 of C/Ni/Fe/Co/S and reduced H2 pressure was used. The catalytic mixture was placed in the reactor in 16 alternating cavities (eight filled and eight empty). Two types of MWCNTs were synthesized depending on the electrode. Mainly MWCNTs with an average diameter of 60 ± 8 nm and length of 2.5 ± 0.7 µm were observed at the anode. On the other hand, MWCNTs of diameter of 58 ± 6 nm and length of 4.1 ± 1.2 µm were seen at the cathode. It was found that the nanotubes were decorated with CS2 having round shapes with an average size of 20 ± 4 nm due to the S and C atoms interacting to create topological defects in the carbon nanostructures. Raman spectroscopy and electron scanning and transmission microscopy were used for nanostructures characterization. The PEADSA method represents a promising alternative for different MWCNTs structures in applications as semiconducting material.