An electrochemical sensor for the determination of p-nitrophenol (p-NP) was developed based on a molecularly imprinted polymer (MIP) on graphene oxide (GO). The sensor was prepared via precipitation polymerization of aniline and ammonium persulfate as the host molecule and initiator. The morphologies and electrochemical behavior of the imprinted sensor were characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), X-ray diffraction (XRD), field emission electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS) and cyclic voltammetry techniques. The electrochemical investigations were conducted by screening the effects of pH, p-NP concentration and scan rate. Under the optimized experimental conditions, the oxidation peak current varies linearly with p-NP concentration, in the range 6 × 10⁻⁵–14 × 10⁻⁵ mol/L with a detection limits of 2 × 10⁻⁵ mol/L (correlation coefficient of 0.991). The electrochemical sensor was also used to detect p-NP in tap water, where it shows the excellent recoveries. Moreover, the sensor probe revealed an excellent selectivity for p-NP compared to other phenol derivatives. This proposed sensor was used successfully for determination of spiked p-nitrophenol in water samples.

基于氧化石墨烯（GO）上的分子印迹聚合物（MIP），开发了一种用于测定对硝基苯酚（p- NP）的电化学传感器。传感器是通过苯胺和过硫酸铵作为主体分子和引发剂的沉淀聚合反应制备的。通过傅立叶变换红外光谱（FTIR），热重分析（TGA），X射线衍射（XRD），场发射电子显微镜（FE-SEM），能量色散X射线对印迹传感器的形貌和电化学行为进行表征光谱学（EDS）和循环伏安法技术。通过筛选pH，p的影响进行电化学研究-NP浓度和扫描速率。在优化的实验条件下，氧化峰电流随p- NP浓度线性变化，范围为6×10 ^-5 –14×10 ^-5  mol / L，检出限为2×10 ^-5  mol / L（相关系数为0.991）。电化学传感器还用于检测自来水中的p- NP，显示出优异的回收率。此外，与其他酚衍生物相比，传感器探针显示出对p -NP的极佳选择性。该传感器可成功用于水样中对硝基苯酚的加标测定。