期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 55, 期 19, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac4fd5
关键词
nanosecond pulsed discharge; gas-liquid discharge; optical emission spectra; reactive species
资金
- National Natural Science Foundation of China [51977023, 51677019, 11965018]
- Fundamental Research Funds for the Central Universities [DUT18LK42]
This paper investigates the effect of adding shielding gas and tubes in nanosecond pulsed helium gas-liquid discharge. It is found that this can decrease the gas temperature and electron density, enhance the plasma volume and area of plasma-liquid interface, and most significantly improve the productions of cOH and H2O2.
In this paper, shielding gas (He) and shielding quartz tube (straight tube and conical tube) is added to nanosecond pulsed He gas-liquid discharge (G-LD) to limit the air diffusion into plasma, and for the purposes of enhancing the plasma volume and productions of cOH and H2O2. The plasma properties, including current-voltage waveforms, the temporal-resolved discharge images, optical emission spectra, gas temperature, electron density, and the cOH and H2O2 productions are analyzed and compared among different discharges generated under the cases of no shielding, shielding He gas, shielding straight tube, and shielding conical tube. The results show that adding extra shielding gas and tubes in the discharge reactor can decrease the gas temperature and electron density, but enhance the plasma volume and area of plasma-liquid interface in comparison with no shielding case. Besides, the addition of shielding gas has the most benefit for enhancing the productions of cOH and H2O2 produced by G-LD. Adding a shielding conical tube slows down the decrease extent of cOH and H2O2 productions caused by increasing discharge gap. When the discharge gap excesses 6 mm, adding a shielding conical quartz also has an obvious increase effect on the production of cOH and H2O2 in compared with no shielding case. While adding a shielding straight tube with small diameter has a little effect on H2O2 production, even a negative effect on cOH production.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据