材料科学
石墨烯
循环伏安法
硝基苯
微分脉冲伏安法
氧化物
镁
纳米复合材料
检出限
扫描电子显微镜
电化学
分析化学(期刊)
核化学
化学工程
电极
纳米技术
化学
复合材料
冶金
环境化学
色谱法
催化作用
物理化学
工程类
生物化学
作者
Thangavelu Kokulnathan,A. Irudaya Jothi,Shen‐Ming Chen,Ghzzai Almutairi,Faheem Ahmed,Nishat Arshi,Bandar AlOtaibi
标识
DOI:10.1016/j.jece.2021.106310
摘要
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.
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