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首页> 外文期刊>Chemistry: A European journal >Non-Thermal Plasma in Contact with Water: The Origin of Species
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Non-Thermal Plasma in Contact with Water: The Origin of Species

机译：与水接触的非热等离子体：物种起源

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Non-thermal atmospheric pressure plasma has attracted considerable attention in recent years due to its potential for biomedical applications. Determining the mechanism of the formation of reactive species in liquid treated with plasma is thus of paramount importance for both fundamental and applied research. In this work, the origin of reactive species in plasma-treated aqueous solutions was investigated by using spin-trapping, hydrogen and oxygen isotopic labelling and electron paramagnetic resonance (EPR) spectroscopy. The species originating from molecules in the liquid phase and those introduced with the feed gas were differentiated by EPR and (HNMR)-H-1 analysis of liquid samples. The effects of water vapour and oxygen admixtures in the feed gas were investigated. All the reactive species detected in the liquid samples were shown to be formed largely in the plasma gas phase. It is suggested that hydrogen peroxide (determined by UV/Vis analysis) is formed primarily in the plasma tube, whereas the radical species OOH, OH and H are proposed to originate from the region between the plasma nozzle and the liquid sample.
机译：非热大气压等离子体由于其在生物医学应用中的潜力，近年来引起了相当大的关注。因此，确定在用等离子体处理过的液体中反应性物质形成的机理对于基础研究和应用研究都至关重要。在这项工作中，通过使用自旋捕集，氢和氧同位素标记以及电子顺磁共振（EPR）光谱研究了等离子体处理的水溶液中反应性物种的起源。通过液体样品的EPR和（HNMR）-H-1分析，区分了液相分子和进料气中引入的分子。研究了进料气中水蒸气和氧气混合物的影响。显示在液体样品中检测到的所有反应性物种主要在等离子体气相中形成。建议过氧化氢（通过UV / Vis分析确定）主要在等离子管中形成，而自由基OOH，OH和H则建议从等离子喷嘴和液体样品之间的区域产生。

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