Study on hydrogen peroxide generation by water surface discharge

Yoshihara, Kazuki; Ruma,; Aoki, Nobuchika; Hosseini, S. H. R.; Sakugawa, Takashi; Akiyama, H.; Lukeš, Petr

doi:10.1109/ppc.2013.6627582

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…1) the discharge branching pattern on water changes as a function of water conductivity; 13,14) 2) the shape of the ground electrode immersed in water affects the surface discharge region on water. 15) On the other hand, the pulse current waveform is one of the indicators of plasma behavior.…”

Section: Introductionmentioning

confidence: 99%

Validation of the local thermodynamic equilibrium at a local current concentration area of positive pulsed surface discharge plasma on water

Furusato

Oura

Matsuda

et al. 2020

Jpn. J. Appl. Phys.

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Pulsed surface discharge on water has been given attention as a water purification technology and material synthesis method. The contribution of this study is to clarify the plasma state of a positive pulsed surface discharge on water. Although the pulse width of the current dramatically decreased with an applied voltage ranging from 10 to 20 kV under a conductivity of water of 1 mS cm−1 and a water depth of 2 mm, the plasma state in the vicinity of the needle electrode was a local thermodynamic equilibrium (LTE) state. Validation of the LTE was performed by the McWhirter criterion. On the other hand, the propagating discharge along the water surface was supposed to be in non-LTE state. Consequently, the pulsed surface discharge on water was in mixed states of LTE and non-LTE.

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Section: Introductionmentioning

confidence: 99%

Validation of the local thermodynamic equilibrium at a local current concentration area of positive pulsed surface discharge plasma on water

Furusato

Oura

Matsuda

et al. 2020

Jpn. J. Appl. Phys.

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Studies on a sinusoidally driven gas–liquid two-phase plasma discharge and its application to sterilization

et al. 2022

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Atmospheric pressure cold plasmas are widely used in the biomedical field as evidenced by developments in recent years. In this study, a quartz tube-guided gas–liquid two-phase discharge has been configured with a hollow needle-water structure. The power source for the device was sinusoidal, and switching between a gas–liquid miscible discharge and a pure gaseous discharge was simple. It was discovered that the gas–liquid discharge was beneficial in terms of reactant species generation and reaction efficiency in terms of processing water. The types of particles, the physicochemical properties, and the concentrations of reactive oxygen and nitrogen species in the discharge were studied spectroscopically. The discharge was discovered to have high levels of H2O2 and NO2−, and the activated water was proven to be effective at sterilizing samples that were contaminated with micro-organisms. Key experimental parameters including the driving voltage and the air flow rate were optimized to achieve the best sterilization conditions. The membrane potential changes in the treated bacteria were also studied to explore the causes of bacterial inactivation. The results showed that the device exhibited a strong bactericidal effect for the gas–liquid mixed phase discharge operating at 17 kV for 5 min with a gas flow rate of 0.3 SLM. In addition, the present device offers enhanced sterilization efficiency relative to the efficiency of conventional plasma sterilization equipment and, therefore, has a wide range of applications.

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Generation of Hydrogen Peroxide in Gas Bubbles Using Pulsed Plasma for Advanced Oxidation Processes

Saeki

Yasuda

2015

IEEE Trans. Plasma Sci.

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Study on hydrogen peroxide generation by water surface discharge

Cited by 3 publications

References 14 publications

Validation of the local thermodynamic equilibrium at a local current concentration area of positive pulsed surface discharge plasma on water

Validation of the local thermodynamic equilibrium at a local current concentration area of positive pulsed surface discharge plasma on water

Studies on a sinusoidally driven gas–liquid two-phase plasma discharge and its application to sterilization

Generation of Hydrogen Peroxide in Gas Bubbles Using Pulsed Plasma for Advanced Oxidation Processes

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