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Plasma Medicine

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ISSN Print: 1947-5764

ISSN Online: 1947-5772

SJR: 0.216 SNIP: 0.263 CiteScore™:: 1.4 H-Index: 24

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Surface Dielectric Barrier Discharge in Closed-Volume Air

Volume 7, Issue 4, 2017, pp. 395-406
DOI: 10.1615/PlasmaMed.2018019459
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ABSTRACT

The postdischarge kinetics of reactive species produced by a surface dielectric barrier discharge (SDBD) ignited in closed-volume air for decomposition of organic molecules in aqueous solutions was investigated. A SDBD with surface of 6 cm2 was operated in a closed volume (0.5 L) of air at atmospheric pressure. The voltage across the plasma gap, the charge transferred through the plasma, and the dissipated power were computed from the charge-voltage diagram to values of 3900V, 0.2 μC, and 6W, respectively. The reactive species produced by the SDBD in a closed volume of air were active for decomposition of methylene blue molecules in small volumes of aqueous solution for a relatively long period of time after the discharge was cut off. The lifetime in gaseous phase of the species active for decomposition of organic molecules was approximately 11 minutes. However, SDBD operation in closed-volume air shortened the lifetime of polyimide dielectric of the discharge microelec-trode system due to the increased humidity and reactivity of the active species generated by plasma. Measurement of relative humidity revealed that the discharge enhanced water evaporation. Atomic force microscopy investigations of dielectric surface in the discharge region revealed drastic modifications of surface morphology with an important increase of surface roughness as the result of SDBD operation.

CITED BY
  1. Dascalu Adina, Besleaga Alexandra, Shimizu Kazuo, Sirghi Lucel, Activation of Water by Surface DBD Micro Plasma in Atmospheric Air, in Recent Advances in Technology Research and Education, 53, 2019. Crossref

  2. Dascalu A., Pohoata V., Shimizu K., Sirghi L., Molecular Species Generated by Surface Dielectric Barrier Discharge Micro-plasma in Small Chambers Enclosing Atmospheric Air and Water Samples, Plasma Chemistry and Plasma Processing, 41, 1, 2021. Crossref

  3. Liu Kun, Zuo Jie, Ran Congfu, Yang Minghao, Geng Wenqiang, Liu Shiting, (Ken) Ostrikov Kostya, Reduced electric field and gas temperature effects on chemical product dynamics in air surface dielectric barrier discharges: from macro-physical parameters to micro-chemical mechanisms, Physical Chemistry Chemical Physics, 24, 15, 2022. Crossref

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