A novel electrochemical sensor based on zinc oxide/nitrogen doped porous carbons (ZnO/NPC) modified electrode has been constructed for detecting 4-aminophenol (4-AP). The ZnO/NPC material was synthesized by one-step carbonization of MOF-5-NH2. The modified glassy carbon electrode (ZnO/NPC/GCE) holds excellent electrocatalytic activity toward 4-AP, with a sensitivity of about 31.02 μA/μM/cm2. Under optimal conditions, its oxidation peak current increases linearly with the increasing concentration of 4-AP (from 5 to 120 μmol/L), and the detection limits is 0.014 μmol/L (S/N = 3). Furthermore, favorable selectivity, superior reproducibility and outstanding stability have been achieved. The ZnO/NPC/GCE has been applied in detecting 4-AP in industrial waste water and achieved positive results with the recovery of 4-AP ranging from 94.02% to 107.7%, which confirms that this sensor is a reliable platform for the detection of 4-AP in waste water.

中文翻译：

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基于MOF衍生的纳米多孔碳的灵敏传感器，用于4-氨基苯酚的电化学检测。

建立了一种基于氧化锌/氮掺杂多孔碳（ZnO / NPC）修饰电极的新型电化学传感器，用于检测4-氨基苯酚（4-AP）。ZnO / NPC材料是通过MOF-5-NH2的一步碳化来合成的。修饰的玻碳电极（ZnO / NPC / GCE）对4-AP具有出色的电催化活性，灵敏度约为31.02μA/μM/ cm2。在最佳条件下，其氧化峰电流随4-AP浓度的增加（从5到120μmol/ L）线性增加，检测极限为0.014μmol/ L（S / N = 3）。此外，获得了有利的选择性，优异的可重复性和出色的稳定性。ZnO / NPC / GCE已用于工业废水中4-AP的检测，并获得了积极的结果，4-AP的回收率为94.02％至107.7％，