Carbon Nanosheets Synthesis in a Gliding Arc Reactor: On the Reaction Routes and Process Parameters

Xintong Ma, Sirui Li (Corresponding author), Rohit Chaudhary, Volker Hessel, Fausto Gallucci

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Non-thermal plasma is a promising technology for high purity nanomaterial synthesis in a fast, flexible and controllable process. Gliding arc discharge, as one of the most efficient non-thermal plasmas, has been widely used in gas treatment but rarely studied for the nanomaterial synthesis. In this study, a comparison study for carbon nanosheets synthesis including toluene dissociation and graphite exfoliation was investigated in a 2D gliding arc reactor at atmospheric pressure. The effects of gas flow rate, precursor concentration and power input on the structures of carbon nanosheets produced through the two synthesis routes were explored and compared. Amorphous carbon nanosheets were produced in both approaches with a few crystalline structures formation in the case of toluene dissociation. The thickness of carbon nanosheets synthesized from graphite exfoliation was less than 3 nm, which was thinner and more uniform than that from toluene dissociation. The flow rate of carrier gas has direct influence on the morphology of carbon nanomaterials in the case of toluene dissociation. Carbon spheres were also produced along with nanosheets when the flow rate decreased from 2 to 0.5 L/min. However, in the case of graphite exfoliation, only carbon nanosheets were observed regardless of the change in flow rate of the carrier gas. The generated chemical species and plasma gas temperatures were measured and estimated for the mechanism study, respectively.

Original languageEnglish
Pages (from-to)191-209
Number of pages19
JournalPlasma Chemistry and Plasma Processing
Volume41
Issue number1
Early online date27 Aug 2020
DOIs
Publication statusPublished - Jan 2021

Keywords

  • Carbon nanosheets synthesis
  • Gliding arc discharge
  • Graphite exfoliation
  • Non-thermal plasma
  • Toluene dissociation

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