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首页> 外文期刊>Electrocatalysis >Nitrite Reduction Enhancement on Semiconducting Electrode Decorated with Copper(II) Aspirinate Complex
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Nitrite Reduction Enhancement on Semiconducting Electrode Decorated with Copper(II) Aspirinate Complex

机译：阿司匹林铜（II）修饰的半导体电极上亚硝酸盐还原的增强

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摘要

The present work seeks to describe a new approach characterized by copper(II) aspirinate complex deposited onto nanotube TiO2 electrodes as mediator of electron transfer during nitrite reduction, aiming at achieving a faster removal of nitrite to nitrogen species oxides. Thin films of copper aspirinate ([Cu-2(asp)(4)]) on the Ti/TiO2 nanotube surface are easily obtained following multi-scans (100 cycles) recorded for the Ti/TiO2 electrode in 0.1 mol L-1 NaCl, pH 4, containing 5.0 x 10(-4) mol L-1 of the copper coordination compound. The complex showed high adherence while the cyclic voltammograms presented redox peaks at -0.15/+0.15 V, which was attributed to the reduction of Cu(II) to Cu(I). Following 5 min of treatment using photoelectrocatalysis on Ti/TiO2-[(Cu)(2)Asp(4)] electrode, a total removal of nitrite was observed, which was found to be at least four times faster compared to Ti/TiO2 electrode. Concomitantly, we also observed a relatively good conversion to nitrogen-containing gaseous species (56 %) besides the formation of 42 % of ammonia. The results, in effect, also indicate that nitrate and nitrite are not detectable in the treated solution up to levels of 0.5 mg L-1. The method under consideration has successfully accounted for the maximum limit of nitrite recommended in drinking water which has been set to 1 mg L-1.
机译：本工作试图描述一种新方法，其特征在于将亚硝酸铜（II）络合物沉积在纳米管TiO2电极上，作为亚硝酸盐还原过程中电子转移的介体，旨在实现将亚硝酸盐更快地去除为氮氧化物。通过在0.1 mol L-1 NaCl中记录Ti / TiO2电极的多次扫描（100次循环），可以轻松获得Ti / TiO2纳米管表面上的阿司匹林铜（[Cu-2（asp）（4）]）薄膜。 ，pH 4，包含5.0 x 10（-4）mol L-1的铜配位化合物。该配合物表现出高粘附性，而循环伏安图显示了在-0.15 / + 0.15 V的氧化还原峰，这归因于Cu（II）还原为Cu（I）。在Ti / TiO2-[（Cu）（2）Asp（4）]电极上使用光电催化处理5分钟后，观察到亚硝酸盐的总去除量，发现它至少比Ti / TiO2电极快四倍。同时，除了42％的氨形成，我们还观察到了相对较好的向含氮气体物质（56％）的转化。实际上，结果还表明在浓度为0.5 mg L-1的处理过的溶液中无法检测到硝酸盐和亚硝酸盐。所考虑的方法已成功解决了饮用水中建议的亚硝酸盐最大限量（设定为1 mg L-1）。

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