A study on the influence of gas mixtures on the property of plasma‐activated water. Issue 2 (11th November 2019)

• Record Type: Journal Article
• Authors: Lai, Cheng‐Chun; Deng, Yong‐Xin; Liao, Ying‐Hao
• Is Part Of: Plasma processes and polymers. Volume 17:Issue 2(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-11
• Subjects: plasma jet -- plasma‐activated water -- reactive nitrogen species -- reactive oxygen species -- sterilization; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201900196
• Languages: English
• ISSNs: 1612-8850

Abstract

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 N O 2 −, while the maximum N O 3 − and H2 O2 are observed for [Ar + air/air] and (Ar/Ar), respectively. Overall, the antibacterial efficacy correlates well with N O 2 − concentration. Abstract : A combined effect of the working gas and chamber gas on the production of nitrate, nitrite, and hydrogen peroxide is presented. It is shown that nitrate, nitrite, and hydrogen peroxide dominate in [Ar + air/air], [Ar + air/Ar], and [Ar/Ar], respectively. Regardless of gas combination, a strong correlation between the antibacterial efficacy and the N O 2 − concentration is observed.