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Three-dimensional N-doped carbon nanotube@carbon foam hybrid: an effective carrier of enzymes for glucose biosensors

机译：三维N-掺杂碳纳米管/碳泡沫杂交：葡萄糖生物传感器的酶有效载体

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摘要

Development of efficient, reliable, and cost-effective biosensors for accurate and convenient detection of glucose is highly desirable in the food industry, biotechnology, and clinical diagnosis. Carbon nanotube (CNT)-based enzyme biosensors have received considerable attention due to their excellent performance. However, the performance of these sensors is limited by the drawbacks of CNTs such as low electron transfer rate and catalytic area, and poor conductivity. Herein, three-dimensional (3D) nitrogen-doped CNTs (N-CNTs) supported by a carbon foam (N-CNT@CF) hybrid is fabricated as the carrier matrix to load glucose oxidase (GOD) for constructing high-performance glucose biosensors. A one-step chemical vapor deposition method is employed for the preparation of a N-CNT@CF hybrid, where N-CNTs are densely grown on the skeleton of carbon foam using iron as a catalyst. FT-IR spectroscopy shows that the N-CNT@CF is an effective carrier of GOD without enzyme denaturation. Combined with the extraordinary properties of 3D N-CNT@CF including large active surface area, high conductivity and fast mass transport dynamics, the GOD/N-CNT@CF biosensor achieves a large linear range (0.05-15.55 mM, R = 0.996) and a low detection limit (5.0 mu M, S/N = 3) for the detection of glucose. Furthermore, the glucose biosensor exhibited high selectivity, good repeatability and stability.
机译：在食品工业，生物技术和临床诊断中，高效地开发高效，可靠和经济高效的生物传感器，非常适合葡萄糖。基于碳纳米管（CNT）的酶生物传感器由于其优异的性能而受到相当大的关注。然而，这些传感器的性能受到CNT的缺点的限制，例如低电子转移率和催化区域，导电性差。这里，由碳泡沫（N-CNT @ CF）杂交物支持的三维（3D）氮掺杂的CNT（N-CNT）作为负载葡萄糖氧化酶（GOD）来制造用于构建高性能葡萄糖生物传感器的载体基质。使用一步化学气相沉积方法用于制备N-CNT @ CF杂种，其中使用铁作为催化剂在碳泡沫的骨架上密度生长N-CNT。 FT-IR光谱表明，N-CNT @ CF是未经酶变性的上帝的有效载体。结合3D N-CNT @ CF的非凡特性，包括大型有源表面积，高导电性和快速传输动力学，GOD / N-CNT @ CF生物传感器达到大线性范围（0.05-15.55 mm，r = 0.996）和检测葡萄糖的低检测极限（5.0μm，s / n = 3）。此外，葡萄糖生物传感器表现出高选择性，良好的重复性和稳定性。

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  • 来源
    《RSC Advances》 |2017年第43期|共9页
  • 作者

    Fan Pinchao; Liu Lijuan; Guo Qiaohui; Wang Junli; Yang Jinhua; Guan Xiaoyu; Chen Shuiliang; Hou Haoqing;

  • 作者单位

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

    Jiangxi Normal Univ Dept Chem &

    Chem Engn Nanchang 330022 Jiangxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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