Two-Dimensional Concentration Distribution of Hydrogen Peroxide Generated by Atmospheric-Pressure Plasma Jet Irradiation

Abstract

The two-dimensional concentration distribution of hydrogen peroxide (H₂O₂) generated by atmospheric-pressure argon (Ar) plasma jet irradiation was semiquantitatively determined using H₂O₂ test strips. An Ar plasma jet was generated with different applied voltages (5–10 kV) and Ar gas flow rates (3–10 L/min) and was irradiated onto the H₂O₂ test strips at different irradiation distances (2–40 mm) and irradiation times (5–30 s). The shape of the distribution of H₂O₂ concentration depended on the combination of the applied voltage, gas flow rate, and the irradiation distance and was classified into four types: circular, double-circular, ring-shaped, and double-ring-shaped. A circular distribution was observed for irradiation distances of ≥30 mm and a double-circular distribution was observed for irradiation distances of 10–20 mm. When the irradiation distance was ≤5 mm, a ring-shaped distribution was observed for applied voltages of ≤6 kV and a double-ring-shaped distribution was observed for applied voltages of ≥7 kV. [DOI: 10.1380/ejssnt.2015.474]