Mononitrotoluenes (MNTs) can cause methemoglobinemia, liver/kidney damage, and skin/eye/throat irritation. Monitoring of MNTs in real and laboratory samples is necessary to maintain levels below permissible limits. Herein, silver oxide quantum dots (Ag₂O QDs) were synthesized using a chemical method and were well characterized using transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and UV–visible spectroscopy. The characterized QDs were coated on a gold (Au) electrode using a binder (Nafion). This modified electrode was evaluated and standardized for redox-based sensing against 2-nitrotoluene. Cyclic voltammetry (CV) was optimized for electrochemical determination of 2-nitrotoluene. The effects of various factors like scan rate, solution pH, analyte concentration, and possible interferants were also evaluated for sensing performance of 2-nitrotoluene. The fabricated sensor displayed a high sensitivity of 100 μA cm⁻²ppm⁻¹ with a limit of detection of 4.3 ppm and a linear range of 5–40 ppm. The proposed technique was reliable for monitoring real as well as laboratory samples of 2-nitrotoluene.

单硝基甲苯（MNT）可能导致高铁血红蛋白血症，肝/肾损害以及皮肤/眼睛/喉咙刺激。必须对真实和实验室样品中的MNT进行监测，以将其水平保持在允许的限值以下。此处，氧化银量子点（Ag ₂O QDs）是使用化学方法合成的，并使用透射电子显微镜（TEM），傅立叶变换红外（FTIR）光谱，X射线衍射（XRD）和紫外可见光谱进行了很好的表征。使用粘合剂（Nafion）将已表征的QD涂覆在金（Au）电极上。对该修饰电极进行了评估，并针对2-硝基甲苯进行了基于氧化还原的传感标准化。优化了循环伏安法（CV），用于电化学测定2-硝基甲苯。还针对2-硝基甲苯的传感性能评估了各种因素的影响，如扫描速率，溶液pH，分析物浓度和可能的干扰物。制成的传感器显示出100μAcm ^-2 ppm ^-1的高灵敏度检测限为4.3 ppm，线性范围为5–40 ppm。所提出的技术对于监测2-硝基甲苯的真实和实验室样品是可靠的。