A study on the influence of gas mixtures on the property of plasma-activated water

Cheng Chun Lai, Yong Xin Deng, Ying Hao Liao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The present study applying a plasma jet to activate water in a controllable environment is aimed to investigate the effect of a combination of (working/chamber gas) on the properties of plasma-activated water. After 10 min of activation, results reveal that a significant decrease in solution pH is observed with the presence of N2. Hydrogen peroxide appears to be the major species for most gas mixtures, except [Ar + air/Ar] and [Ar + air/air], where nitrite and nitrate dominate. A gas mixture of [Ar + air/Ar] produces the maximum concentration of NO- 2, while the maximum NO- 3 and H2O2 are observed for [Ar + air/air] and (Ar/Ar), respectively. Overall, the antibacterial efficacy correlates well with NO- 2 concentration.

Original languageEnglish
Article number1900196
JournalPlasma Processes and Polymers
Volume17
Issue number2
DOIs
StatePublished - Feb 2020

Keywords

  • plasma jet
  • plasma-activated water
  • reactive nitrogen species
  • reactive oxygen species
  • sterilization

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