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首页> 外文期刊>Advances in Environmental Technology >Cu decorated multiwalled carbon nanotubes: Application to electrocatalytic oxidation and determination of 4-nitrophenol in river water samples by square-wave voltammetry
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Cu decorated multiwalled carbon nanotubes: Application to electrocatalytic oxidation and determination of 4-nitrophenol in river water samples by square-wave voltammetry

机译：铜修饰的多壁碳纳米管：在方波伏安法用于河水中电催化氧化和测定4-硝基苯酚中的应用

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摘要

A simple and fast electrochemical method was described and evaluated for the determination of hazardous compound, 4-nitrophenol. In this work, trace amounts of 4- nitrophenol were determined by square – wave voltammetry. A glassy carbon electrode was modified with multi-walled carbon nanotubes and copper nanoparticles. A synergistic effect was observed between Cu nanoparticles and carbon nanotubes which resulted in enhanced oxidation peak current of 4-nitrophenol. The modified electrode showed more sensitivity towards 4-nitrophenol compared to unmodified one. A wide linear concentration range from 0.2 to 298.0 μM was obtained for 4-nitrophenol with a detection limit of 0.06 μM. Reproducibility and repeatability of the method were evaluated for determination of 4-nitrophenol (0.1 mM) as 3.47% and 2.30%, respectively (relative standard deviation, RSD %), which are acceptable. The method was applied to the analysis of 4- nitrophenol (22.2 μM) in spiked river water samples, successfully. Simplicity, sensitivity, selectivity and high efficiency of the proposed method can be used in routine analysis of trace amounts of 4-nitrophenol in polluted waters.
机译：描述了一种简单快速的电化学方法，并对测定危险化合物4-硝基苯酚的方法进行了评估。在这项工作中，通过方波伏安法测定了痕量的4-硝基苯酚。用多壁碳纳米管和铜纳米粒子对玻璃碳电极进行了改性。在铜纳米颗粒和碳纳米管之间观察到协同作用，导致4-硝基苯酚的氧化峰电流增加。与未修饰电极相比，修饰电极对4-硝基苯酚的敏感性更高。 4-硝基苯酚的线性浓度范围从0.2到298.0μM，检测极限为0.06μM。评价了该方法的重现性和可重复性，确定4-硝基苯酚（0.1 mM）的含量分别为3.47％和2.30％（相对标准偏差，RSD％），可以接受。该方法已成功应用于加标河水样品中的4-硝基苯酚（22.2μM）的分析。该方法简便，灵敏，选择性好，效率高，可用于污水中痕量4-硝基苯酚的常规分析。

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