Zhang Daojun, Zhang Xiaobei, Bu Yingping, Zhang Jingchao, Zhang Renchun
College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, China.
College of Chemistry, Zhengzhou University, 100 Science Road, Zhengzhou 450001, China.
Nanomaterials (Basel). 2022 Apr 19;12(9):1394. doi: 10.3390/nano12091394.
Nonenzymatic electrochemical detection of glucose is popular because of its low price, simple operation, high sensitivity, and good reproducibility. Co-Cu MOFs precursors were synthesized via the solvothermal way at first, and a series of porous spindle-like Cu-Co sulfide microparticles were obtained by secondary solvothermal sulfurization, which maintained the morphology of the MOFs precursors. Electrochemical studies exhibit that the as-synthesized Cu-Co sulfides own excellent nonenzymatic glucose detection performances. Compared with CuS, Co (II) ion-doped CuS can improve the conductivity and electrocatalytic activity of the materials. At a potential of 0.55 V, the as-prepared Co-CuS-2 modified electrode exhibits distinguished performance for glucose detection with wide linear ranges of 0.001-3.66 mM and high sensitivity of 1475.97 µA·mM·cm, which was much higher than that of CuS- and Co-CuS-1-modified electrodes. The constructed sulfide sensors derived from MOF precursors exhibit a low detection limit and excellent anti-interference ability for glucose detection.
非酶电化学葡萄糖检测因其价格低廉、操作简单、灵敏度高和重现性好而备受青睐。首先通过溶剂热法合成了Co-Cu MOFs前驱体，然后通过二次溶剂热硫化得到了一系列多孔纺锤状的Cu-Co硫化物微粒，其保留了MOFs前驱体的形貌。电化学研究表明，所合成的Cu-Co硫化物具有优异的非酶葡萄糖检测性能。与CuS相比，Co(II)离子掺杂的CuS可以提高材料的导电性和电催化活性。在0.55 V的电位下，所制备的Co-CuS-2修饰电极在葡萄糖检测方面表现出卓越的性能，线性范围宽达0.001-3.66 mM，灵敏度高达1475.97 μA·mM·cm，远高于CuS和Co-CuS-1修饰电极。由MOF前驱体衍生构建的硫化物传感器对葡萄糖检测具有低检测限和优异的抗干扰能力。
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