Electrochemical Behavior of Single CuO Nanoparticles: Implications for the Assessment of their Environmental Fate.
Electrochemical Behavior of Single CuO Nanoparticles: Implications for the Assessment of their Environmental Fate.
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DOI：
10.1002/smll.201801765
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发表时间：
2018-07
期刊：
影响因子：
13.3
通讯作者：
G. Zampardi;J. Thöming;H. Naatz;Hatem M. A. Amin;S. Pokhrel;L. Mädler;R. Compton
中科院分区：
文献类型：
--
作者：
G. Zampardi;J. Thöming;H. Naatz;Hatem M. A. Amin;S. Pokhrel;L. Mädler;R. Compton
采用电极-粒子碰撞法和循环伏安法分别从单粒子和系综水平研究了氧化铜纳米粒子在中性水溶液中的电化学行为。Cl-和NO3-阴离子对纳米粒子上发生的电化学过程的影响进行了进一步评估。CuO纳米粒子的电活性被发现在两种类型的实验之间是不同的。在单颗粒尺度下，CuO纳米颗粒的还原在氯离子的存在下比在含硝酸根离子的溶液中进行到更高的程度。然而，在多粒子尺度的CuO还原进行到相同的程度，无论存在于溶液中的阴离子的类型。现实地评估环境命运的影响，因此一般的金属基纳米粒子的毒性，特别是铜基纳米粒子，进行了讨论。
The electrochemical behavior of copper oxide nanoparticles is investigated at both the single particle and at the ensemble level in neutral aqueous solutions through the electrode-particle collision method and cyclic voltammetry, respectively. The influence of Cl- and NO3- anions on the electrochemical processes occurring at the nanoparticles is further evaluated. The electroactivity of CuO nanoparticles is found to differ between the two types of experiments. At the single-particle scale, the reduction of the CuO nanoparticles proceeds to a higher extent in the presence of chloride ion than of nitrate ion containing solutions. However, at the multiparticle scale the CuO reduction proceeds to the same extent regardless of the type of anions present in solution. The implications for assessing realistically the environmental fate and therefore the toxicity of metal-based nanoparticles in general, and copper-based nanoparticles in particular, are discussed.