Preparative application of liquid-plasma interaction

本研究的目标是创造一种新型的反应介质，包括液态等离子体，以开发有机或无机物质的制备方法。到目前为止，人们一直想当然地认为，在这样一个极高能量条件下的反应注定不会有选择性。本研究利用气体等离子体与液体溶液之间的相互作用和溶液中诱导产生的活性物质来提高选择性，当等离子体持续作用于溶液表面时，辉光放电电解可以有效地将溶解在水溶液中的有机物分解为二氧化碳。推测羟基自由基在成矿作用中起着关键作用。当以全氟碳化物作为液体介质与气体等离子体接触时，观察到放电电极上有碳化物的沉淀或沉积。气相等离子体诱导液相氧化的机理研究(1)常压直流等离子体氧化降解苯酚(2)高活性氧化剂生成速率的测定(3)涉及羟基自由基的矿化途径(4)高压交流等离子体有机氧化(5)液-等离子体界面发射光谱的测量2.利用液相等离子体反应制备含碳物质(1)多氯甲烷或聚氯乙烯生成C_1~C_6卤代烃(2)碳在放电电极上的沉淀或沉积的表征(3)十氯卡宾作为中间超活性物种

The goal of the present research is the creation of a novel reaction medium involving liquid-phase plasma in order to develop the preparative method of organic or inorganic substances. Hitherto, it has been taken for granted that the reactions under such an extremely energetic condition should be destined to be unselective. In the present research, it was undertaken to utilize the interaction between gaseous plasma and liquid solution and reactive species inductively generated in the solution to improve the selectivity.Organic substances dissolved in aqueous solution were effectively decomposed to carbon dioxide when a plasma was sustained over the solution surface by means of glow discharge electrolysis. It was suggested that hydroxyl radical would play a crucial role in the mineralization. When perhalocarbons were used as liquid media in contact with gaseous plasmas, the formation of carbonaceous precipitate or deposit on the discharge electrode was observed.1. Mechanistic study of liquid-phase oxidation induced by gaseous plasma(1) Oxidative degradation of phenols by using an atmospheric pressure dc plasma(2) Iodometric determination of the generation rate of highly reactive oxidant(3) Mineralization pathway involving hydroxyl radical(4) Organic oxidation using high voltage ac plasma(5) Measurement of emission spectra from liquid-plasma interface2. Preparation of carbonaceous substances utilizing liquid-phase plasma reactions(1) Formation of C1〜C6 halocarbons from polychloromethanes or polychloroethylenes(2) Characterization of carbonaceous precipitate or deposit on the discharge electrode(3) Dechlorocarbene as intermediate super-reactive species