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首页> 美国卫生研究院文献>Scientific Reports >Highly Dispersed NiO Nanoparticles Decorating graphene Nanosheets for Non-enzymatic Glucose Sensor and Biofuel Cell
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Highly Dispersed NiO Nanoparticles Decorating graphene Nanosheets for Non-enzymatic Glucose Sensor and Biofuel Cell

机译：用于非酶葡萄糖传感器和生物燃料电池的装饰石墨烯纳米片的高度分散的NiO纳米粒子

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摘要

Nickel oxide-decorated graphene nanosheet (NiO/GNS), as a novel non-enzymatic electrocatalyst for glucose oxidation reaction (GOR), was synthesized through a facile hydrothermal route followed by the heat treatment. The successful synthesis of NiO/GNS was characterized by a series of techniques including XRD, BET, SEM and TEM. Significantly, the NiO/GNS catalyst show excellent catalytic activity toward GOR, and was employed to develop a sensitive non-enzymatic glucose sensor. The developed glucose sensor could response to glucose in a wide range from 5 μM–4.2 mM with a low detection limit (LOD) of 5.0 μM (S/N = 3). Importantly, compared with bare NiO, the catalytic activity of NiO/GNS was much higher. The reason might be that the 2D structure of graphene could prevent the aggregation of NiO and facilitate the electron transfer at electrode interface. Moreover, the outstanding catalytic activity of NiO/GNS was further demonstrated by applying it to construct a biofuel cell using glucose as fuel, which exhibited high stability and current density.
机译：氧化镍修饰的石墨烯纳米片（NiO / GNS）是一种新型的用于葡萄糖氧化反应（GOR）的非酶电催化剂，通过水热法合成，然后进行热处理。 NiO / GNS的成功合成是通过包括XRD，BET，SEM和TEM在内的一系列技术来表征的。重要的是，NiO / GNS催化剂对GOR表现出优异的催化活性，并被用于开发灵敏的非酶葡萄糖传感器。研制的葡萄糖传感器可以在5 µM至4.2 µm的宽范围内对葡萄糖做出响应，检测限（LOD）为5.0 µM（S / N = 3）。重要的是，与裸露的NiO相比，NiO / GNS的催化活性要高得多。原因可能是石墨烯的二维结构可以防止NiO的聚集并促进电极界面处的电子转移。此外，通过将其应用于以葡萄糖为燃料的生物燃料电池中，NiO / GNS的出色催化活性得到了进一步证明，该生物燃料电池显示出高稳定性和电流密度。

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