Study the effect of electrode material, its surface, and dielectric material on plasma and properties of plasma-activated water

In the present work, the significance of various components (ground electrode material and its surface (knurling pitch size), power electrode material and type, and dielectric material) of dielectric barrier discharge plasma device (DBD-PD) on plasma and plasma-activated water (PAW) properties are studied. The characterization of plasma is performed by studying voltage-current waveform and plasma discharge power. In addition, the characterization of PAW is performed by studying the physicochemical properties (PP) and reactive oxygennitrogen species (RONS) concentration. The results of plasma characterization and PAW properties reveals that introducing knurling to ground electrodes showed significant improve the physicochemical properties of PAW and RONS concentration. Moreover, the use of quartz over glass as dielectric layer provides a substantial enhancement in PAW properties. Furthermore, the use of wire as a power electrode compared to mesh and sheet also help in improving the PAW properties. Further, we observed that the ground and power electrodes made using copper enriches the RONS concentration and physicochemical properties of PAW compared to brass and stainless steel.