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首页> 外文期刊>Chemistry: A European journal >Chemically Reduced Graphene Oxide for the Assessment of Food Quality: How the Electrochemical Platform Should Be Tailored to the Application
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Chemically Reduced Graphene Oxide for the Assessment of Food Quality: How the Electrochemical Platform Should Be Tailored to the Application

机译：化学减少的石墨烯氧化物用于评估食品质量：如何对应用程序量身定制的电化学平台

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摘要

Graphene platforms have been drawing considerable attention in electrochemistry for the detection of various electroactive probes. Depending on the chemical composition and properties of the probe, graphene materials with diverse structural features may be required to achieve an optimal electrochemical performance. This work comprises a comparative study on three chemically modified graphenes, obtained from the same starting material and with different oxygen functionalities and structural defects (graphene oxide (GO), chemically reduced graphene oxide (CRGO), and thermally reduced graphene oxide (TRGO)) towards the electrochemical detection of quinine, an important flavoring agent present in tonic-based beverages. In general, the reduced graphenes, namely CRGO and TRGO, showed enhanced performance in terms of calibration sensitivity and selectivity, due to the improved heterogeneous electron-transfer rates on their surfaces. In particular, CRGO provided the best overall electrochemical performance, which can be attributed to its higher density of structural defects and reduced amount of oxygen functionalities. For this reason, CRGO was employed for the electrochemical detection of quinine in commercial tonic drink samples, showing high sensitivity and selectivity, and therefore representing a valid low-cost alternative to more complicated and time consuming traditional analytical methods.
机译：石墨烯平台在电化学中汲取了相当大的关注，用于检测各种电活性探针。根据探针的化学成分和性质，可能需要具有不同结构特征的石墨烯材料来实现最佳的电化学性能。该工作包括对三种化学修饰的石墨烯的比较研究，该化学改性的石墨烯和不同的氧官能团和结构缺陷（石墨烯（GO），化学还原的氧化石墨烯（CRGO），以及热还原石墨烯（TRGO））朝向奎宁的电化学检测，滋补饮料中存在的重要调味剂。通常，由于其表面上改善的异质电子传递速率，减少的石墨烯，即CRGO和TRGO，在校准灵敏度和选择性方面表现出增强的性能。特别地，CRGO提供了最佳的整体电化学性能，其可归因于其较高的结构缺陷密度和减少量的氧函数。因此，使用CRGO用于商业滋补饮料样品中奎宁的电化学检测，显示出高灵敏度和选择性，因此表示有效的低成本替代方案，以更复杂和耗时的传统分析方法。

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  • 来源
    《Chemistry: A European journal》 |2017年第8期|共7页
  • 作者

    ChuEr Chng; Adriano Ambrosi; Chun Kiang Chua; Martin Pumera; Alessandra Bonanni;

  • 作者单位

    Division of Chemistry &

    Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 (Singapore);

    Division of Chemistry &

    Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 (Singapore);

    Division of Chemistry &

    Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 (Singapore);

    Division of Chemistry &

    Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 (Singapore);

    Division of Chemistry &

    Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 (Singapore);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    electrochemistry; food analysis; graphene; quinine;

    机译：电化学;食物分析;石墨烯;奎宁;

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