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首页> 外文期刊>Journal of Materials Chemistry, B. materials for biology and medicine >Nitrogen doped graphene nanosheet supported platinum nanoparticles as high performance electrochemical homocysteine biosensors
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Nitrogen doped graphene nanosheet supported platinum nanoparticles as high performance electrochemical homocysteine biosensors

机译：氮掺杂石墨烯纳米片负载的铂纳米粒子作为高性能电化学高半胱氨酸生物传感器

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摘要

Functional carbon nanomaterials are significantly important for the development of high performance sensitive and selective electrochemical biosensors. In this study, graphene supported platinum nanoparticles (GN-PtNPs) and nitrogen doped graphene supported platinum nanoparticles (N-GNPtNPs) were synthesized by a simple chemical reduction method and explored as high performance nanocatalyst supports, as well as doped nanocatalyst supports, toward electrochemical oxidation of homocysteine (HCY) for the first the time. Our studies demonstrate that N-doped graphene supported PtNPs show higher electrocatalytic activity for HCY with an experimental detection limit of 200 pM. Moreover, N-doped graphene supported Pt was demonstrated to have excellent selectivity in the electrochemical oxidation of HCY i.e., the detection of HCY is successful in the presence of a 20-fold excess of ascorbic acid (AA). The practical application of N-doped graphene supported PtNP materials is effectively shown for the determination of HCY in both human blood serum and urine samples, by differential pulse voltammetry under optimized conditions. Our findings conclude that N-doped graphene supported PtNPs can be developed as a high performance and versatile nano-electrocatalyst for electrochemical biosensor applications.
机译：功能性碳纳米材料对于高性能敏感和选择性电化学生物传感器的开发非常重要。在这项研究中，通过简单的化学还原方法合成了石墨烯负载的铂纳米颗粒（GN-PtNPs）和氮掺杂的石墨烯负载的铂纳米颗粒（N-GNPtNPs），并将其作为高性能纳米催化剂载体以及掺杂的纳米催化剂载体用于电化学领域。高半胱氨酸（HCY）的首次氧化。我们的研究表明，N掺杂的石墨烯负载的PtNPs对HCY具有更高的电催化活性，实验检测限为200 pM。此外，已证明N掺杂的石墨烯负载的Pt在HCY的电化学氧化中具有优异的选择性，即，在20倍过量的抗坏血酸（AA）的存在下，HCY的检测是成功的。通过优化条件下的差分脉冲伏安法，有效地显示了N掺杂石墨烯负载的PtNP材料在实际测定人血清和尿液中的HCY的实际应用。我们的发现得出结论，N掺杂的石墨烯负载的PtNPs可以被开发为用于电化学生物传感器应用的高性能和多功能纳米电催化剂。

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