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首页> 外文期刊>RSC Advances >Electrochemical sensor based on a three dimensional nanostructured MoS2 nanosphere-PANI/reduced graphene oxide composite for simultaneous detection of ascorbic acid, dopamine, and uric acid
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Electrochemical sensor based on a three dimensional nanostructured MoS2 nanosphere-PANI/reduced graphene oxide composite for simultaneous detection of ascorbic acid, dopamine, and uric acid

机译：基于三维纳米结构的MoS2纳米球-PANI /还原氧化石墨烯复合物的电化学传感器，用于同时检测抗坏血酸，多巴胺和尿酸

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A three dimensional (3D) nanostructured composite based on the self-assembly of MoS _(2) nanospheres and polyaniline (PANI) loaded on reduced graphene oxide (denoted by 3D MoS _(2) -PANI/rGO) was prepared via a feasible one-pot hydrothermal process. The 3D MoS _(2) -PANI/rGO nanocomposite not only exhibits good functionality and bioaffinity but also displays high electrochemical catalytic activity. As such, the developed 3D MoS _(2) -PANI/rGO nanocomposite can be employed as the sensing platform for simultaneously detecting small biomolecules, i.e. , ascorbic acid (AA), dopamine (DA), and uric acid (UA). The peak currents obtained from the differential pulse voltammetry (DPV) measurements depended linearly on the concentrations in the wide range from 50 μM to 8.0 mM, 5.0 to 500 μM, and 1.0 to 500 μM, giving low detection limits of 22.20, 0.70, and 0.36 μM for AA, DA, and UA, respectively. Furthermore, the 3D MoS _(2) -PANI/rGO-based electrochemical sensor also exhibited high selectivity, good reproducibility and stability toward small molecule detection. The present sensing strategy based on 3D MoS _(2) -PANI/rGO suggests a good reliability in the trace determination of electroactive biomolecules.
机译：通过可行的制备基于MoS _（2）纳米球和负载在还原氧化石墨烯上的聚苯胺（PANI）自组装的三维（3D）纳米结构复合材料（用3D MoS _（2）-PANI / rGO表示）。一锅水热法。 3D MoS _（2）-PANI / rGO纳米复合材料不仅表现出良好的功能性和生物亲和力，而且还表现出很高的电化学催化活性。这样，可以将开发的3D MoS_（2）-PANI / rGO纳米复合材料用作同时检测小生物分子即抗坏血酸（AA），多巴胺（DA）和尿酸（UA）的传感平台。从差分脉冲伏安法（DPV）测量获得的峰值电流线性范围取决于50μM至8.0 mM，5.0至500μM和1.0至500μM的浓度范围，从而使检测限较低，分别为22.20、0.70和AA，DA和UA分别为0.36μM。此外，基于3D MoS _（2）-PANI / rGO的电化学传感器还显示出高选择性，良好的重现性和对小分子检测的稳定性。当前基于3D MoS _（2）-PANI / rGO的传感策略表明，在电活性生物分子的痕量测定中具有良好的可靠性。

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