Poly 1,8-Diaminonaphtahlene/cysteine (poly 1,8-DAN/Cys) combined with carbon black (CB) nanoparticles are proposed as an excellent sensor for the detection of nitrite ions. To design the electrocatalyst, a simple approach consisting on drop-casting method was applied to disperse carbon black on the surface of glassy carbon electrode, followed by the immobilization of cysteine on the surface of CB nanoparticles. The electrochemical polymerization of 1,8-Diaminonaphthalene was conducted in acidic medium by using cyclic voltammetry. The prepared hybrid material was denoted poly 1,8-DAN /Cys/CB. Several methods were used to characterize the structural and electrochemical behavior of the reported hybrid material including Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), amperometry and differential pulse voltammetry (DPV). The prepared electrode displayed an outstanding electroactivity towards nitrite ions reflected by an enhancement in the intensity of the current and a decrease of the charge transfer resistance. Poly 1,8-DAN/Cys/CB displayed an excellent sensing performance towards the detection of nitrite with a very low detection limit of 0.25 µM. Two linear ranges of 1–40 µM and 20–210 µM when using amperometry and differential pulse voltammetry (DPV) were obtained respectively. This work highlights the simple preparation of a polymeric film rich in amine and thiol groups for nitrite detection.

聚 1,8-二氨基萘/半胱氨酸（聚 1,8-DAN/Cys）与炭黑 (CB) 纳米颗粒结合被提议作为检测亚硝酸根离子的优良传感器。为了设计电催化剂，采用滴铸法组成的简单方法将炭黑分散在玻碳电极表面，然后将半胱氨酸固定在 CB 纳米粒子表面。1,8-二氨基萘的电化学聚合采用循环伏安法在酸性介质中进行。制备的杂化材料表示为poly 1,8-DAN /Cys/CB。几种方法用于表征所报道的杂化材料的结构和电化学行为，包括傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM)、循环伏安法 (CV)、电化学阻抗谱（EIS）、电流法和差分脉冲伏安法（DPV）。制备的电极对亚硝酸根离子表现出优异的电活性，这反映在电流强度的增强和电荷转移电阻的降低。Poly 1,8-DAN/Cys/CB 在检测亚硝酸盐方面表现出优异的传感性能，检测限极低，仅为 0.25 µM。当使用电流法和差分脉冲伏安法 (DPV) 时，分别获得了 1–40 µM 和 20–210 µM 的两个线性范围。这项工作突出了一种用于亚硝酸盐检测的富含胺和硫醇基团的聚合物薄膜的简单制备。制备的电极对亚硝酸根离子表现出优异的电活性，这反映在电流强度的增强和电荷转移电阻的降低。Poly 1,8-DAN/Cys/CB 在检测亚硝酸盐方面表现出优异的传感性能，检测限极低，仅为 0.25 µM。当使用电流法和差分脉冲伏安法 (DPV) 时，分别获得了 1–40 µM 和 20–210 µM 的两个线性范围。这项工作突出了一种用于亚硝酸盐检测的富含胺和硫醇基团的聚合物薄膜的简单制备。制备的电极对亚硝酸根离子表现出优异的电活性，这反映在电流强度的增强和电荷转移电阻的降低。Poly 1,8-DAN/Cys/CB 在检测亚硝酸盐方面表现出优异的传感性能，检测限极低，仅为 0.25 µM。当使用电流法和差分脉冲伏安法 (DPV) 时，分别获得了 1–40 µM 和 20–210 µM 的两个线性范围。这项工作突出了一种用于亚硝酸盐检测的富含胺和硫醇基团的聚合物薄膜的简单制备。当使用电流法和差分脉冲伏安法 (DPV) 时，分别获得了 1–40 µM 和 20–210 µM 的两个线性范围。这项工作突出了一种用于亚硝酸盐检测的富含胺和硫醇基团的聚合物薄膜的简单制备。当使用电流法和差分脉冲伏安法 (DPV) 时，分别获得了 1–40 µM 和 20–210 µM 的两个线性范围。这项工作突出了一种用于亚硝酸盐检测的富含胺和硫醇基团的聚合物薄膜的简单制备。