Hydroxyl radicals and hydrogen peroxide formation at nonthermal plasma-water interface

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper investigated hydroxyl radicals and hydrogen peroxide formation under a needle-plate electrode con- figuration using positive-polarity dc discharges generated in air, nitrogen, and helium. The discharge mode in air and nitrogen was found to change above ultrapure water; initially, a nanosecond pulse discharge was observed, transitioning to a diffuse discharge due to the increasing conductivity of the water. The discharge in helium was a nanosecond pulse discharge and the repetition rate increased with increasing water conductivity. It was found that hydroxyl radicals contribute to 7%, 78%, and 70% of hydrogen peroxide formation when using the ultrapure water in air, nitrogen, and helium, respectively. It is suggested that hydroxyl radicals are formed by water reactions with energetic positive ions and the neutral particles, such as N + 2 ,He + ,O,H, and HO 2 . Part of hydrogen peroxide is directly formed from atoms and radical reactions with water in nitrogen and helium, while oxygen reactions are heavily involved for hydrogen peroxide formation in air. A fluorophotometry method, using terephthalic acid, was used to directly quantify the formation of hydroxyl radicals and compared with the tert-butanol method.
LanguageEnglish
Pages2084 - 2091
Number of pages8
JournalIEEE Transactions on Plasma Science
Volume44
Issue number10
DOIs
Publication statusPublished - 31 Oct 2016

Fingerprint

hydroxyl radicals
peroxides
hydrogen peroxide
helium
water
nitrogen
air
conductivity
neutral particles
pulses
positive ions
needles
repetition
polarity
acids
electrodes
oxygen
configurations
atoms

Keywords

  • hydroxyl radical
  • hydrogen peroxide
  • fluorophotometry
  • terephthalic acid
  • spectrophotometry
  • titanium

Cite this

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title = "Hydroxyl radicals and hydrogen peroxide formation at nonthermal plasma-water interface",
abstract = "This paper investigated hydroxyl radicals and hydrogen peroxide formation under a needle-plate electrode con- figuration using positive-polarity dc discharges generated in air, nitrogen, and helium. The discharge mode in air and nitrogen was found to change above ultrapure water; initially, a nanosecond pulse discharge was observed, transitioning to a diffuse discharge due to the increasing conductivity of the water. The discharge in helium was a nanosecond pulse discharge and the repetition rate increased with increasing water conductivity. It was found that hydroxyl radicals contribute to 7{\%}, 78{\%}, and 70{\%} of hydrogen peroxide formation when using the ultrapure water in air, nitrogen, and helium, respectively. It is suggested that hydroxyl radicals are formed by water reactions with energetic positive ions and the neutral particles, such as N + 2 ,He + ,O,H, and HO 2 . Part of hydrogen peroxide is directly formed from atoms and radical reactions with water in nitrogen and helium, while oxygen reactions are heavily involved for hydrogen peroxide formation in air. A fluorophotometry method, using terephthalic acid, was used to directly quantify the formation of hydroxyl radicals and compared with the tert-butanol method.",
keywords = "hydroxyl radical, hydrogen peroxide, fluorophotometry, terephthalic acid, spectrophotometry, titanium",
author = "Zhao, {Yi Yi} and Tao Wang and Wilson, {Mark P.} and MacGregor, {Scott J.} and Timoshkin, {Igor V.} and Ren, {Qing Chun}",
note = "(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.",
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Hydroxyl radicals and hydrogen peroxide formation at nonthermal plasma-water interface. / Zhao, Yi Yi; Wang, Tao; Wilson, Mark P.; MacGregor, Scott J.; Timoshkin, Igor V.; Ren, Qing Chun.

In: IEEE Transactions on Plasma Science, Vol. 44, No. 10, 31.10.2016, p. 2084 - 2091.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hydroxyl radicals and hydrogen peroxide formation at nonthermal plasma-water interface

AU - Zhao, Yi Yi

AU - Wang, Tao

AU - Wilson, Mark P.

AU - MacGregor, Scott J.

AU - Timoshkin, Igor V.

AU - Ren, Qing Chun

N1 - (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.

PY - 2016/10/31

Y1 - 2016/10/31

N2 - This paper investigated hydroxyl radicals and hydrogen peroxide formation under a needle-plate electrode con- figuration using positive-polarity dc discharges generated in air, nitrogen, and helium. The discharge mode in air and nitrogen was found to change above ultrapure water; initially, a nanosecond pulse discharge was observed, transitioning to a diffuse discharge due to the increasing conductivity of the water. The discharge in helium was a nanosecond pulse discharge and the repetition rate increased with increasing water conductivity. It was found that hydroxyl radicals contribute to 7%, 78%, and 70% of hydrogen peroxide formation when using the ultrapure water in air, nitrogen, and helium, respectively. It is suggested that hydroxyl radicals are formed by water reactions with energetic positive ions and the neutral particles, such as N + 2 ,He + ,O,H, and HO 2 . Part of hydrogen peroxide is directly formed from atoms and radical reactions with water in nitrogen and helium, while oxygen reactions are heavily involved for hydrogen peroxide formation in air. A fluorophotometry method, using terephthalic acid, was used to directly quantify the formation of hydroxyl radicals and compared with the tert-butanol method.

AB - This paper investigated hydroxyl radicals and hydrogen peroxide formation under a needle-plate electrode con- figuration using positive-polarity dc discharges generated in air, nitrogen, and helium. The discharge mode in air and nitrogen was found to change above ultrapure water; initially, a nanosecond pulse discharge was observed, transitioning to a diffuse discharge due to the increasing conductivity of the water. The discharge in helium was a nanosecond pulse discharge and the repetition rate increased with increasing water conductivity. It was found that hydroxyl radicals contribute to 7%, 78%, and 70% of hydrogen peroxide formation when using the ultrapure water in air, nitrogen, and helium, respectively. It is suggested that hydroxyl radicals are formed by water reactions with energetic positive ions and the neutral particles, such as N + 2 ,He + ,O,H, and HO 2 . Part of hydrogen peroxide is directly formed from atoms and radical reactions with water in nitrogen and helium, while oxygen reactions are heavily involved for hydrogen peroxide formation in air. A fluorophotometry method, using terephthalic acid, was used to directly quantify the formation of hydroxyl radicals and compared with the tert-butanol method.

KW - hydroxyl radical

KW - hydrogen peroxide

KW - fluorophotometry

KW - terephthalic acid

KW - spectrophotometry

KW - titanium

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