Influence of plasma instability on gas-phase synthesis of N-graphene in dual-channel microwave plasma torch at atmospheric pressure
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| Year of publication | 2023 |
| Type | Conference abstract |
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| Description | The influence of plasma instability of on the gas-phase synthesis of nitrogen-doped graphene (N-graphene) was investigated using dual-channel microwave plasma torch at atmospheric pressure. Plasma plume instability was controlled by delivered microwave power and the interplay of Ar central channel flow rate and gas flow rates of precursors (C2H2 and N2) delivered into electrode’s secondary channel. The lateral size of N-graphene nanosheets increased and the number of defects in its structure decrease with delivered microwave power, however, concentration of nitrogen in the N-graphene structure decreased as well and was strongly depended on stability of plasma plume. Plasma was monitored by optical emission (OES) and Fourier transform infrared spectroscopy (FTIR). Graphene was analyzed by scanning electron microscopy (SEM), Raman, and X-ray photoelectron electron spectroscopy (XPS) and thermogravimetry (TGA). |
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