Abstract The use of non-thermal plasma at atmospheric pressure has emerged as a technique for the substrate-free, gas-phase synthesis of graphene nanoflakes (GNFs). In this paper, a non-thermal plasma based on magnetically stabilized gliding arc discharge (MSGAD) was employed to prepare GNFs. The effects of the carbon-containing precursor, plasma gas, and arc current on the GNFs synthesis were investigated. The technique produced GNFs with sizes of 50–200 nm and 1–20 layers, spherical carbon nanoparticles with 10–40 nm diameters, and graphitic particles. The results showed that the formation of GNFs depended on the selection of proper process parameters, such as precursors with a high H/C ratio, an Ar-N2 plasma gas, a low arc current, a low precursor flow rate, and a suitable plasma gas flow rate. Correlations between the process parameters and the product morphology indicated that abundant H atoms and fewer polycyclic aromatic hydrocarbons were favorable for the formation of GNFs.

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使用基于磁稳定滑动电弧放电的非热等离子体合成石墨烯薄片

摘要 在大气压下使用非热等离子体已成为一种无基材气相合成石墨烯纳米薄片 (GNF) 的技术。在本文中，基于磁稳定滑动电弧放电 (MSGAD) 的非热等离子体用于制备 GNF。研究了含碳前驱体、等离子体气体和电弧电流对 GNFs 合成的影响。该技术产生了尺寸为 50-200 nm 和 1-20 层的 GNF、直径为 10-40 nm 的球形碳纳米颗粒和石墨颗粒。结果表明，GNF 的形成取决于适当工艺参数的选择，例如高 H/C 比的前驱体、Ar-N2 等离子体气体、低电弧电流、低前驱体流速和合适的等离子体气体流速。