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首页> 外文期刊>International Journal of Electrochemical Science >A Novel Photoelectrochemical Glucose Sensor Based on Graphene-CdS Nanocomposites Decorated with CoOx Nanosheets
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A Novel Photoelectrochemical Glucose Sensor Based on Graphene-CdS Nanocomposites Decorated with CoOx Nanosheets

机译：基于CoO x 纳米片修饰的石墨烯-CdS纳米复合材料的新型光电化学葡萄糖传感器

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摘要

In this work, visible light driven enzyme-free glucose PEC sensor was developed by electrochemicallydeposited CoO x nanosheets on graphene-CdS nanocomposites modified electrode to achieve both theelectrocatalytic and photoelectrocatalytic oxidation of glucose at the resultant CoO x /graphene-CdSnanocomposites modified electrode. Scanning electron microscopy, electrochemical impedancespectroscopy and cyclic voltammetry were used to characterize the morphology and electrochemicalproperties of the resultant CoO x /graphene-CdS nanocomposites. The CV results demonstrated thatdecoration of CoO x nanosheets largely enhanced the photoelectrocatalytic activity of graphene-CdScomposites toward glucose oxidation in alkaline solution. The glucose detection sensitivity undervisible light irradiation is dramatically improved compared to dark condition. Good performance wasobtained for the CoO x /graphene-CdS nanocomposites based glucose sensor. The feasibility of thepresent method was confirmed by good recovery results for glucose detection in human urine samples.
机译：在这项工作中，通过在石墨烯-CdS纳米复合材料修饰的电极上电化学沉积CoO x纳米片，开发了可见光驱动的无酶葡萄糖PEC传感器，以在所得的CoO x /石墨烯-CdSn纳米复合材料修饰电极上实现葡萄糖的电催化和光电催化氧化。使用扫描电子显微镜，电化学阻抗谱和循环伏安法表征所得的CoO x /石墨烯-CdS纳米复合材料的形貌和电化学性能。 CV结果表明，CoO x纳米片的装饰大大增强了石墨烯-CdS复合材料对碱性溶液中葡萄糖氧化的光电催化活性。与黑暗条件相比，可见光照射下的葡萄糖检测灵敏度大大提高。基于CoO x /石墨烯-CdS纳米复合材料的葡萄糖传感器获得了良好的性能。本方法的可行性被人尿样中葡萄糖检测的良好回收结果所证实。

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