AbstractWell-dispersed composites of graphene and molybdenum disulfide were synthesized without using a mediator. The composites were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The electrochemical properties of a glassy carbon electrode (GCE) modified with the graphene/MoS2 composite were investigated by electrochemical impedance spectroscopy and cyclic voltammetry. Hydroquinone was selected as a model target to show the sensing capability of the modified GCE. The GCE, best operated at a working voltage of 0.10 V (vs. Ag/AgCl), exhibits excellent catalytic activity towards hydroquinone, with a linear response in the 0.5 to 300 μM concentration range and a 37 nM detection limit (at an S/N ratio of 3). The superior performance of the GCE is attributed to the synergistic effects of graphene and MoS2. Graphical abstractWell-dispersed graphene/MoS2 without non-covalent modification was prepared and used to fabricate an electrochemical sensor for the differential pulse voltammetric (DPV) detection of hydroquinone.

中文翻译：

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使用由石墨烯和二硫化钼组成的复合材料改性的玻璃碳电极对氢醌的电流检测

摘要 在不使用介体的情况下合成了石墨烯和二硫化钼的分散良好的复合材料。通过扫描电镜、透射电镜和X射线衍射对复合材料进行了表征。通过电化学阻抗谱和循环伏安法研究了石墨烯/二硫化钼复合材料修饰的玻璃碳电极（GCE）的电化学性能。选择对苯二酚作为模型目标，以显示改进的 GCE 的传感能力。GCE 的最佳工作电压为 0.10 V（相对于 Ag/AgCl），对氢醌表现出优异的催化活性，在 0.5 至 300 μM 浓度范围内具有线性响应，检测限为 37 nM（在 S/ 3)的N比。GCE 的优越性能归功于石墨烯和二硫化钼的协同作用。图形摘要制备了无非共价修饰的良好分散的石墨烯/二硫化钼，并用于制造电化学传感器，用于对苯二酚的差分脉冲伏安 (DPV) 检测。