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Enzyme-free hydrogen peroxide sensor based on Au@Ag@C core-double shell nanocomposites

机译：基于Au @ Ag @ C核-双壳纳米复合材料的无酶过氧化氢传感器

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摘要

The well-designed Au@Ag@C core-double shell nanocomposites were synthesized via a facile method, and were used to fabricate an enzyme-free amperometric hydrogen peroxide (H2O2) sensor. The size, shape, elementary composition and structure of the nanocomposites were characterized by transmission electron microscope (TEM), energy-dispersed spectrum (EDS) and X-ray diffraction (XRD). The outermost layer of the nanocomposites was amorphous carbon, the second layer was Ag and the core was Au. The Au@Ag@C core-double shell nanocomposites exhibit attractive activity for electrocatalytic reduction of H2O2 according to the electrochemical experiments. It also demonstrates the H2O2 sensor possess well performance with a wide linear range of 5.0 mu M to 4.75 mM and a limit of detection (LOD) as low as 0.14 mu M (S/N = 3). Furthermore, the interference from the common interfering species, such as glucose, ascorbic acid, dopamine and uric acid can be effectively avoided. In a word, the Au@Ag@C nanocomposites are promising candidates for enzyme-free H2O2 sensor. (C) 2015 Elsevier B.V. All rights reserved.
机译：设计良好的Au @ Ag @ C核-双壳纳米复合材料通过一种简便的方法合成，并用于制造无酶的电流型过氧化氢（H2O2）传感器。纳米复合材料的尺寸，形状，元素组成和结构通过透射电子显微镜（TEM），能量分散谱（EDS）和X射线衍射（XRD）表征。纳米复合材料的最外层是无定形碳，第二层是Ag，核心是Au。根据电化学实验，Au @ Ag @ C核-双壳纳米复合材料对H2O2的电催化还原表现出有吸引力的活性。它还表明H2O2传感器具有良好的性能，线性范围为5.0μM至4.75 mM，检出限（LOD）低至0.14μM（S / N = 3）。此外，可以有效避免来自常见干扰物质（例如葡萄糖，抗坏血酸，多巴胺和尿酸）的干扰。总之，Au @ Ag @ C纳米复合材料有望成为无酶H2O2传感器的候选材料。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2015年第30期|428-434|共7页
  • 作者

    Li Yancai; Zhang Yayun; Zhong Yanmei; Li Shunxing;

  • 作者单位

    Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China|Minnan Normal Univ, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China;

    Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China;

    Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China;

    Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China|Minnan Normal Univ, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Au@Ag@C core-double shell nanocomposites; Electrocatalytical reduction; Hydrogen peroxide; Enzyme-free sensor;

    机译：Au @ Ag @ C核-双壳纳米复合材料;电催化还原;过氧化氢;无酶传感器;

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