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首页> 外文期刊>Mikrochimica Acta: An International Journal for Physical and Chemical Methods of Analysis >A glassy carbon electrode modified with a composite consisting of reduced graphene oxide, zinc oxide and silver nanoparticles in a chitosan matrix for studying the direct electron transfer of glucose oxidase and for enzymatic sensing of glucose
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A glassy carbon electrode modified with a composite consisting of reduced graphene oxide, zinc oxide and silver nanoparticles in a chitosan matrix for studying the direct electron transfer of glucose oxidase and for enzymatic sensing of glucose

机译:在壳聚糖基质中修饰由还原性氧化石墨烯,氧化锌和银纳米颗粒组成的复合物的玻碳电极,用于研究葡萄糖氧化酶的直接电子转移和葡萄糖的酶促传感

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摘要

The authors describe the fabrication of a nanocomposite consisting of reduced graphene oxide, zinc oxide and silver nanoparticles by microwave-assisted synthesis. The composite was further reduced in-situ with hydrazine hydrate and then placed, along with the enzyme glucose oxidase, on a glassy carbon electrode. The synergistic effect of the materials employed in the nanocomposite result in excellent electrocatalytic activity. The Michaelis-Menten constant of the adsorbed GOx is 0.25 mM, implying a remarkable affinity of the GOx for glucose. The amperometric response of the modified GCE is linearly proportional to the concentration of glucose in 0.1 to 12.0 mM concentration range, and the detection limit is 10.6 A mu M. The biosensor is highly selective, well reproducible and stable.
机译:作者描述了通过微波辅助合成法制备由还原的氧化石墨烯,氧化锌和银纳米颗粒组成的纳米复合材料。用水合肼将复合物进一步原位还原,然后将其与葡萄糖氧化酶一起置于玻璃碳电极上。纳米复合材料中所用材料的协同作用导致优异的电催化活性。吸附的GOx的Michaelis-Menten常数为0.25 mM,这表明GOx对葡萄糖具有显着的亲和力。修饰的GCE的安培响应与浓度在0.1至12.0 mM的葡萄糖浓度成线性比例,检出限为10.6 AμM。该生物传感器具有高选择性,可重复性好和稳定的特点。

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