Zheng Shengbiao, Zhang Nini, Li Liang, Liu Tianna, Zhang Yuyang, Tang Jing, Guo Jiahao, Su Shao
College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China.
Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering, Research Center, Bengbu 233030, China.
Sensors (Basel). 2023 Aug 5;23(15):6957. doi: 10.3390/s23156957.
Herein, a three-dimensional flower-like cobalt-nickel bimetallic metal-organic framework (CoNi-MOF) coupled with two-dimensional graphene oxide (GO) nanocomposites was successfully synthesized for the selective and simultaneous electrochemical determination of catechol (CC) and hydroquinone (HQ). The three-dimensional flower-like structure of the CoNi-MOF/GO nanocomposite has a multilayer structure and a large surface area, which greatly improves its electrocatalytic activity towards CC and HQ. Differential pulse voltammetry (DPV) results showed that the peak-to-peak separation of CC (0.223 V) and HQ (0.120 V) was 103 mV at a CoNi-MOF/GO modified glassy carbon electrode (CoNi-MOF/GO/GCE), suggesting that the proposed modified electrode can selectively and simultaneously determine them. Under optimal conditions, the CoNi-MOF/GO/GCE showed an excellent analytical performance for the simultaneous determination of CC and HQ, including a wide linear range (0.1-100 μM), low detection limit (0.04 μM for HQ and 0.03 μM for CC) and high anti-interference ability. As expected, the developed modified electrode has been used to analyze CC and HQ in river water, with acceptable results.
在此，成功合成了一种三维花状钴镍双金属金属有机框架（CoNi-MOF）与二维氧化石墨烯（GO）的纳米复合材料，用于选择性同时电化学测定邻苯二酚（CC）和对苯二酚（HQ）。CoNi-MOF/GO纳米复合材料的三维花状结构具有多层结构和大表面积，极大地提高了其对CC和HQ的电催化活性。差分脉冲伏安法（DPV）结果表明，在CoNi-MOF/GO修饰玻碳电极（CoNi-MOF/GO/GCE）上，CC（0.223 V）和HQ（0.120 V）的峰峰分离为103 mV，表明所提出的修饰电极能够选择性同时测定它们。在最佳条件下，CoNi-MOF/GO/GCE对同时测定CC和HQ表现出优异的分析性能，包括宽线性范围（0.1 - 100 μM）、低检测限（HQ为0.04 μM，CC为0.03 μM）和高抗干扰能力。正如预期的那样，所制备的修饰电极已用于分析河水中的CC和HQ，结果令人满意。
