A novel nanosensor for the detection of bisphenol A (BPA) in drinking water has been developed using functionalized multiwalled carbon nanotube (f-MWCNT)- and silver nanoparticles (AgNPs)-modified glassy carbon electrode (GCE). Functionalized and unfunctionalized MWCNT were characterized by Fourier transform infrared spectroscopy (FTIR) and Energy-Dispersive X-ray Analysis (EDAX). Morphological characterization of f-MWCNT and AgNPs/f-MWCNT was investigated by Transmission Electron Microscopy (TEM). The electrochemical behavior of the developed sensor toward BPA was examined by Cyclic Voltammetry (CV). The equivalent electrical circuit was demonstrated using Electrochemical Impedance Spectroscopy (EIS). Several important parameters controlling the performance of the sensor were investigated, such as the different numbers of deposited AgNPs layers, the effect of the scan rate, and the influence of the pH. Under optimized measurement conditions, the sensor showed a wide linear range response of BPA (70 nM–6000 nM) and a low limit of detection (LOD) of 40 nM. AgNPs/f-MWCNT/GCE sensor shows high stability, reproducibility, repeatability, and selectivity. The proposed procedure was successfully applied to detect BPA in drinking water with satisfactory recovery data results.

Graphic abstract

中文翻译：

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基于功能化多壁碳纳米管和银纳米粒子的新型经济高效纳米传感器的纳米工程，用于灵敏检测饮用水中的 BPA

使用功能化多壁碳纳米管 (f-MWCNT) 和银纳米粒子 (AgNPs) 修饰的玻璃碳电极 (GCE) 开发了一种用于检测饮用水中双酚 A (BPA) 的新型纳米传感器。功能化和未功能化的 MWCNT 通过傅里叶变换红外光谱 (FTIR) 和能量色散 X 射线分析 (EDAX) 进行表征。通过透射电子显微镜 (TEM) 研究了 f-MWCNT 和 AgNPs/f-MWCNT 的形态特征。通过循环伏安法 (CV) 检查开发的传感器对 BPA 的电化学行为。使用电化学阻抗谱 (EIS) 演示了等效电路。研究了控制传感器性能的几个重要参数，例如不同数量的沉积 AgNPs 层、扫描速率的影响和 pH 值的影响。在优化的测量条件下，传感器显示出 BPA (70 nM–6000 nM) 的宽线性范围响应和 40 nM 的检测下限 (LOD)。AgNPs/f-MWCNT/GCE 传感器显示出高稳定性、重现性、可重复性和选择性。所提出的程序已成功应用于检测饮用水中的 BPA，并获得了令人满意的回收数据结果。

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