Investigation of Plasma-Organic Materials Interaction in Aqueous Solution with Atmospheric Pressure Plasmas
Investigation of Plasma-Organic Materials Interaction in Aqueous Solution with Atmospheric Pressure Plasmas
复制标题
大气压等离子体水溶液中等离子体-有机材料相互作用的研究
DOI：
10.1088/1742-6596/518/1/012019
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
A. Miyazaki and Y. Setsuhara
中科院分区：
文献类型：
--
作者：
K. Takenaka;A. Miyazaki and Y. Setsuhara
研究了大气压等离子体与水溶液中有机物的相互作用。研究了气液界面等离子体暴露降解亚甲基蓝的过程。在等离子体的光发射光谱中，除了强的He发射线之外，还存在由于水解离形成的O和OH自由基的发射。使用UV-Vis光谱法测量MB水溶液在等离子体暴露期间的吸光度变化。吸收峰强度随着等离子体暴露时间的延长而降低，10 min后发生完全脱色。由于发现等离子体暴露会降低水的pH值，因此使用具有不同pH值的溶液研究了pH值变化对MB降解的影响。然而，改变pH值被认为对甲基溴降解没有影响。结果表明，MB的降解发生由于MB和自由基之间的相互作用，通过血浆/液体界面。
An investigation was carried out into the interaction of an atmospheric pressure plasma with an organic material in an aqueous solution. The degradation of methylene blue (MB) by plasma exposure through the gas/liquid interface was studied. In the optical emission spectrum of the plasma, in addition to strong He emission lines, emissions due to O and OH radicals formed by dissociation of water were present. The change in the absorbance of a MB aqueous solution during plasma exposure was measured using UV-Vis spectroscopy. The absorption peak intensity decreased with plasma exposure time and complete decolorization occurred after 10 min. Since plasma exposure was found to decrease the pH of water, the effect of changes in pH on MB degradation in the absence of a plasma was investigated using solutions with different pH values. However, varying the pH was found to have no influence on MB degradation. The results indicated that MB degradation occurred due to interactions between MB and radicals across the plasma/liquid interface.