NDLI: Development of direct gas injection system for atmospheric-pressure in-solution discharge plasma for plasma degradation and material syntheses

Content Provider	Royal Society of Chemistry (RSC)
Author	Yui, Hiroharu Kanno, Kenta Banno, Motohiro
Copyright Year	2016
Abstract	By applying a high pulsed voltage to a gap between two electrodes placed in a solution, an atmospheric-pressure in-solution glow (ASG) plasma is generated. The ASG plasma is applied in a new material processing method, called solution plasma processing (SPP). In order to accelerate the reaction and to add functions to the synthesized materials, it is important to alter the gas content in the ASG plasma. We developed a direct gas injection system for an ASG discharge cell. When O2, CO2, N2 and Ar gases were injected into the ASG plasma, emission bands due to the derivatives of the injected gases were observed in the emission spectra from the ASG plasma. The electron number density in the ASG plasma was increased by the O2, CO2, and N2 injections, probably due to the enhancements of the α and γ processes by the larger molecular weights than H2O. In addition, the first dielectric breakdown of the solution and the formation of the gas bubble processes gradually disappeared due to the gas injection. When O2 was injected, the amount of ·OH generation was increased. By the enhancement of the ·OH generation, the degradation speed of rhodamine B in the ASG plasma was increased by a factor of two. When Au nanoparticles were synthesized utilizing the ASG plasma, the zeta potential of the Au nanoparticles was increased by about 30% by the O2 injection. The plasma parameters and the reactivity of the ASG plasma can be altered more widely by changing the kind of injected gas and the flow rate.
Starting Page	16030
Ending Page	16036
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	6
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c5ra18836a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Water Rhodamine Oxygen Cell membrane ASG Zeta potential Electrical breakdown Number density Stellar-wind bubble
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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