Accurate detection of highly toxic aromatic nitro compounds in the water medium is urgent for the protection of human health and eco system. In the present study, we report the graphene oxide/ magnesium oxide nanocomposite (GO/MgO-NC) has been proposed for electrochemical analysis of nitrobenzene (NBZ) in water samples. The GO/MgO-NC was characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscope, transmission electron microscopy, and energy dispersive X-ray analysis. Likewise, the electrochemical behaviour of NBZ was investigated through cyclic voltammetry and differential pulse voltammetry. The GO/MgO-NC electrode shows an excellent NBZ sensing properties compared to other electrodes. Under optimized conditions, the GO/MgO-NC/GCE can well measure the concentrations of NBZ in the range of 0.1–38.9 µM and 58.5–2333.5 µM with a low limit of detection of 0.01 µM. Besides, the GO/MgO-NC/GCE exhibits excellent selectivity, repeatability, reproducibility and stability. More importantly, the proposed GO/MgO-NC/GCE was further expanded to quantify NBZ in water samples with recoveries between 99.35–99.80%, providing an effective approach for the trace of NBZ in environmental medium.

准确检测水介质中剧毒芳香族硝基化合物对保护人类健康和生态系统至关重要。在本研究中，我们报告了氧化石墨烯/氧化镁纳米复合材料 (GO/MgO-NC) 已被提议用于水样中硝基苯 (NBZ) 的电化学分析。GO/MgO-NC 通过 X 射线衍射、拉曼光谱、扫描电子显微镜、透射电子显微镜和能量色散 X 射线分析表征。同样，通过循环伏安法和微分脉冲伏安法研究了 NBZ 的电化学行为。与其他电极相比，GO/MgO-NC 电极显示出优异的 NBZ 传感特性。在优化条件下，GO/MgO-NC/GCE 可以很好地测量 0.1–38.9 µM 和 58.5–2333 范围内的 NBZ 浓度。5 µM，检测下限为 0.01 µM。此外，GO/MgO-NC/GCE 表现出优异的选择性、重复性、重现性和稳定性。更重要的是，所提出的 GO/MgO-NC/GCE 进一步扩展到量化水样中的 NBZ，回收率在 99.35-99.80% 之间，为环境介质中 NBZ 的痕量提供了一种有效的方法。