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

摘要

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]