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首页> 外文期刊>Chemosphere >Extraordinary catalysis induced by titanium foil cathode plasma for degradation of water pollutant
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Extraordinary catalysis induced by titanium foil cathode plasma for degradation of water pollutant

机译：钛箔阴极等离子体诱导的非常规催化降解水污染物。

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The present paper reports a rapid and cost-effective bifunctional approach to the degradation of organic pollutants in the aqueous solution. This in situ hybrid induced photocatalytic method involves the advanced oxidation process, and photocatalytic process induced by ultraviolet radiated from the plasma discharge to improve the degradation efficiency. This powerful plasma allows the organic molecules to be cleaved either in the plasma zone or on the plasma/solution interface through hydrogen abstraction and electron transfer. Four parallel metal foil electrodes (i.e. Ta, Cu, Ti and Au coated Ti), used as cathodes in the two-electrode system, were evaluated in terms of their degradable performance to organic pollutants. It was found that the degradation rates are dependent on the electrical conduction of metal cathodes. During the discharge process, the Ti-based foil produces TiO2 particles, which then act as catalyst in the electrolyte and perform the photocatalytic process along with the plasma discharge process to degrade organic pollutants. It is of particular interest that gold nanoparticles, generated from Au coated Ti foil film during electrode discharging, are less than 5 nm in size and further enhance the TiO2 photocatalytic activity. In fact, this bifunctional plasma discharge process to the degradation of water pollutant provides an insight into more applications such as chemical conversion, water purification and dust pollution. (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文报道了一种快速且经济高效的双功能方法，用于降解水溶液中的有机污染物。这种原位杂化诱导的光催化方法涉及先进的氧化过程，以及由等离子体放电辐射的紫外线诱导的光催化过程，以提高降解效率。这种强大的等离子体使有机分子可以通过氢提取和电子转移在等离子体区或在等离子体/溶液界面裂解。在两个电极系统中用作阴极的四个平行金属箔电极（即Ta，Cu，Ti和Au涂层的Ti）被评估为可降解为有机污染物的性能。发现降解速率取决于金属阴极的导电。在放电过程中，Ti基箔产生TiO2颗粒，然后在电解质中充当催化剂，并与等离子体放电过程一起执行光催化过程，以降解有机污染物。特别令人感兴趣的是，在电极放电过程中，由Au涂层的Ti箔膜产生的金纳米粒子的尺寸小于5 nm，并进一步增强了TiO2的光催化活性。实际上，这种双功能等离子体放电过程可降解水污染物，从而为更多应用提供了见识，例如化学转化，水净化和粉尘污染。 （C）2018 Elsevier Ltd.保留所有权利。

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