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The fate of plasma-generated oxygen atoms in aqueous solutions: non-equilibrium atmospheric pressure plasmas as an efficient source of atomic O(aq)

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posted on 14.05.2018, 09:05 by J. Benedikt, M. Mokhtar Hefny, Alexander H. Shaw, Benjamin BuckleyBenjamin Buckley, Felipe IzaFelipe Iza, S. Schakermann, J.E. Bandow
Non-equilibrium radio-frequency driven atmospheric-pressure plasma in He/0.6%O2 gas mixture has been used to study the reaction mechanism of plasma-generated oxygen atoms in aqueous solutions. The effluent from the plasma source operated with standard and 18O-labeled O2 gas was used to treat water in the presence of phenol as a chemical probe. Comparing the mass spectrometry and gas chromatography-mass spectrometry data of the solutions treated with plasma under normal and labeled oxygen provides clear evidence that O(aq) originating from the gas phase enters the liquid and reacts directly with phenol, without any intermediate reactions. Additionally, the atmospheric-pressure plasma source demonstrates great potential to be an effective source of O(aq) atoms without the requirement for any precursors in the liquid phase.

Funding

This work was supported by financially by COST Action TD1208; JB acknowledges funding from the German Research Foundation (BE 4349/5-1); JEB acknowledges funding from the German Research Foundation (BA 4193/7-1) and the German federal state of North-Rhine Westphalia for the financial support for the mass spectrometer.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Physical Chemistry Chemical Physics

Citation

BENEDIKT, J. ...et al., 2018. The fate of plasma-generated oxygen atoms in aqueous solutions: non-equilibrium atmospheric pressure plasmas as an efficient source of atomic O(aq). Physical Chemistry Chemical Physics, 20, 12037-12042.

Publisher

Royal Society of Chemistry

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by-nc/4.0/

Acceptance date

26/02/2018

Publication date

2018-04-19

Notes

This is an Open Access Article. It is published by Royal Society of Chemistry under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC). Full details of this licence are available at: http://creativecommons.org/licenses/by-nc/4.0/

ISSN

1463-9076

Language

en

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