Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 10, Pages 3496-3505Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201503771
Keywords
plasma chemistry; EPR spectroscopy; isotopic labelling; radicals; reactive oxygen species
Categories
Funding
- Leverhulme Trust [RPG-2013-079]
- EPSRC [EP/H003797/1, EP/K018388/1]
- EPSRC [EP/H003797/1, EP/K018388/1, EP/H003797/2] Funding Source: UKRI
Ask authors/readers for more resources
Non-thermal atmospheric pressure plasma has attracted considerable attention in recent years due to its potential for biomedical applications. Determining the mechanism of the formation of reactive species in liquid treated with plasma is thus of paramount importance for both fundamental and applied research. In this work, the origin of reactive species in plasma-treated aqueous solutions was investigated by using spin-trapping, hydrogen and oxygen isotopic labelling and electron paramagnetic resonance (EPR) spectroscopy. The species originating from molecules in the liquid phase and those introduced with the feed gas were differentiated by EPR and (HNMR)-H-1 analysis of liquid samples. The effects of water vapour and oxygen admixtures in the feed gas were investigated. All the reactive species detected in the liquid samples were shown to be formed largely in the plasma gas phase. It is suggested that hydrogen peroxide (determined by UV/Vis analysis) is formed primarily in the plasma tube, whereas the radical species OOH, OH and H are proposed to originate from the region between the plasma nozzle and the liquid sample.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available