The characterization of radio-frequency discharge using electrolyte solution as one electrode at atmospheric pressure

Abstract

Atmospheric pressure discharges driven by radio-frequency source were generated using electrolyte solution as one electrode. The electron density calculated from the Stark broadening of Hβ (486.1 nm) was in the order of 1015 cm−3 and showed a parabolic shape with the pH value of the solution. The simulated gas temperature increased from 950 to 2750 K as the input power increased from 12 to 40 W. We found that the plasma exposure was accompanied with the acidification of the solution electrode; it was ascribed to the dissolution of nitrogen-related compounds, such as HNO2, HNO3 and NxOy which originate from the oxidation of nitrogen in air. Also, solute atom line emission was observed in the plasma zone and evaporation was demonstrated to play an important role in the solute transport.

A review of plasma–liquid interactions for nanomaterial synthesis

“…Ultraviolet (UV) light is usually observed in the plasma-liquid system [79,80]. Therefore, the high energy of UV photons can be transferred to water molecules, producing potential reducing/oxidizing species, →…”

Optical diagnostic of bipolar electrical discharges in HCl, KCl, and KOH solutions

“…Chen et al found a Boltzmann correlation between the increase of the plasma temperature and the increase of the Na emission line. 27 Therefore, it may be assumed that the generation of the atomic potassium in the KCl and KOH solutions determined the increase of the electron temperature ( Fig. 11).…”

Spectroscopic Characterization of Miniaturized Atmospheric-Pressure dc Glow Discharge Generated in Contact with Flowing Small Size Liquid Cathode

“…Recently, APGD plasmas with various liquid electrodes have been studied at different currents and distances from the liquid electrode [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], while the other plasma generation parameters were faintly investigated. Nevertheless, the phenomena of glow discharge generated at atmospheric pressure are still poorly understood.…”