Analysis of the production mechanism of H 2 O 2 in water treated by helium DC plasma jets

作者：Zeyu Chen, Dingxin Liu, Chen Chen, Dehui Xu, Zhijie Liu, Wenjie Xia, Mingzhe Rong, Michael G. Kong · 发表于：Journal of Physics D Applied Physics · 年份：2018 · DOI：10.1088/1361-6463/aad0eb · 被引用次数：55 · 研究领域：Plasma Applications and Diagnostics、Electrohydrodynamics and Fluid Dynamics、Plasma Diagnostics and Applications

Abstract In this paper, helium plasma jets are used for water activation to explore the production mechanism of H 2 O 2 in the water. Either positive or negative DC voltage is used for the plasma excitation. It is found that the concentration of aqueous H 2 O 2 induced by the positive plasma jet is ~4 times larger than that by the negative plasma jet with similar average discharge current. Three production pathways of aqueous H 2 O 2 are considered important in literature, including the electrolysis, the dissolution of gaseous H 2 O 2 , and the combination of aqueous OH. However, the first two pathways are found to have similar contributions on H 2 O 2 production for the positive and negative plasma jets. It is deduced that the OH combination in the surface layer of the plasma-activated water is most responsible for the concentration difference of aqueous H 2 O 2 between the two plasma jets.