A novel large-scale plasma source: two discharge modes and their correlation to the production of aqueous reactive species

作者：Wang, Bingchuan; Liu, Dingxin^*; Zhang, Zhiquan; Li, Qiaosong; Liu, Zhijie; Guo, Li; Wang, Xiaohua; Kong, Michael G.

来源：Journal of Physics D: Applied Physics , 2017, 50(30): 305202.

DOI：10.1088/1361-6463/aa7a90

• surface dielectric barrier discharge
• jet array
• reactive species
• plasma-liquid interaction

In this paper, a novel large-scale plasma source is put forward, which can generate two modes of discharge, i.e. the surface dielectric barrier discharge and the plasma jet array, by just varying the helium gas flow rate. It is found that the discharge power changes a little with the increasing gas flow rate, but the densities of reactive species in the gas phase and in the treated water change a lot. In particular, the gaseous O-3 has its density decreasing while the aqueous O-3 has its concentration increasing with the increasing gas flow rate. In the plasma-treated water, the reactive nitrogen species such as nitrite and nitrate have their concentrations first increasing and then decreasing, while the reactive oxygen species such as H2O2, O-3 and OH have their concentrations increasing monotonically, implying that the plasma source is well-adaptive for different application requirements.

• 出版日期2017-8-2
• 单位西安交通大学; 电力设备电气绝缘国家重点实验室