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Facile synthesis of 3D porous nitrogen-doped graphene as an efficient electrocatalyst for adenine sensing

机译：适用于3D多孔氮掺杂石墨烯作为腺嘌呤感应的有效电催化的合成

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摘要

In this work, a simple, low-cost and eco-friendly strategy for fabricating the three-dimensional porous nitrogen-doped graphene (3D-N-GN) is demonstrated by combining the hydrothermal assembly and freeze-drying process without using any framework support. The desired features for 3D-N-GN, such as rich macroporosity, nitrogen-doping structure and high active surface area have been confirmed by scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemical techniques, respectively. In comparison with two-dimensional graphene (2D-GN) and nitrogen-doped graphene (2D-N-GN), 3D-N-GN makes a more negative shift in the oxidation peak potential of adenine together with a remarkable increase in the oxidation peak current, highlighting the importance of the nitrogen-doping and 3D construction of the graphene-based support for improving the electrocatalytic performance. It also indicates that 3D-N-GN can be used as an efficient electrocatalyst for adenine sensing. Furthermore, the sensing conditions are optimized and the resulting sensor displays excellent analytical performance in the detection of adenine at low concentrations ranging from 0.02 to 1.20 mu M, with a detection limit of 8 nM. Finally, this proposed method not only exhibits preferable reproducibility, stability and adequate sensitivity, but also demonstrates good efficiency in the detection of adenine in biological fluids.
机译：在这项工作中，通过在不使用任何框架支撑的情况下，通过组合水热组件和冷冻干燥过程来证明简单，低成本和生态友好的制造三维多孔氮掺杂石墨烯（3D-N-GN）的策略。通过扫描电子显微镜，X射线光电子能谱和电化学技术已经确认了3D-N-GN的所需特征，例如富巨孔，氮掺杂结构和高活性表面积。与二维石墨烯（2D-GN）和氮掺杂石墨烯（2D-N-GN）相比，3D-N-GN在腺嘌呤的氧化峰值电位中具有更负面的变化，以及氧化的显着增加峰值电流，突出氮气掺杂和3D构建基于石墨烯的载体的重要性，以改善电催化性能。它还表明3D-N-GN可用作腺嘌呤感测的有效电催化剂。此外，优化感测条件，得到的传感器在低浓度的检测中显示出优异的分析性能，在低浓度为0.02-1.20μm，检测限为8nm。最后，这种提出的方​​法不仅表现出优选的再现性，稳定性和足够的敏感性，而且还证明了在生物流体中检测腺嘌呤的良好效率。

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  • 来源
    《RSC Advances》 |2016年第37期|共9页
  • 作者

    Li Junhua; Jiang Jianbo; Feng Haibo; Xu Zhifeng; Tang Siping; Deng Peihong; Qian Dong;

  • 作者单位

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Hengyang Normal Univ Coll Chem &

    Mat Sci Hengyang 421008 Peoples R China;

    Hengyang Normal Univ Coll Chem &

    Mat Sci Hengyang 421008 Peoples R China;

    Hengyang Normal Univ Coll Chem &

    Mat Sci Hengyang 421008 Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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