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首页> 外文期刊>International Journal of Electrochemical Science >Cu-Au/rGO Nanoparticle Based Electrochemical Sensor for 4- Chlorophenol Detection
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Cu-Au/rGO Nanoparticle Based Electrochemical Sensor for 4- Chlorophenol Detection

机译：基于Cu-Au / rGO纳米粒子的4-氯酚检测电化学传感器

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Copper, gold or gold/copper nanoparticles loaded on reduced graphene oxide (Cu/rGO, Au/rGO and Cu-Au/rGO) were synthesized as catalysts, using chemical and fractional reduction processes. Thesematerials were characterized by scanning electron microscopy, X-ray diffraction, transmission electronmicroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. A series ofsensitive 4-chlorophenol (4-CP) sensors were fabricated using electrodes modified with these threecatalysts. The impedance values of these devices were assessed using an alternating current impedancemethod, while the detection of 4-CP was investigated by cyclic voltammetry. The Cu-Au/rGO exhibitedthe best catalytic properties. Under optimized conditions (pH 6.5, scan rate 100 mV/s), a sensor basedon a glassy carbon electrode modified with this material exhibited a low 4-CP detection limit of 0.17μmol/L, and demonstrated good reproducibility and long-term stability. This sensor has high applicationvalue in on-line detection of chlorophenol pollutants in wastewater.
机译：使用化学和分步还原工艺合成了负载在还原氧化石墨烯（Cu / rGO，Au / rGO和Cu-Au / rGO）上的铜，金或金/铜纳米颗粒作为催化剂。这些材料通过扫描电子显微镜，X射线衍射，透射电子显微镜，傅立叶变换红外光谱和X射线光电子光谱来表征。使用这三种催化剂修饰的电极制备了一系列敏感的4-氯苯酚（4-CP）传感器。这些设备的阻抗值使用交流阻抗法评估，而4-CP的检测通过循环伏安法进行研究。 Cu-Au / rGO表现出最好的催化性能。在优化条件下（pH 6.5，扫描速率100 mV / s），基于用这种材料修饰的玻璃碳电极的传感器显示出低的4-CP检测极限（0.17μmol/ L），并具有良好的重现性和长期稳定性。该传感器在废水中氯酚污染物的在线检测中具有很高的应用价值。

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