Synthesis of dopamine-derived N-doped carbon nanotubes/Fe3O4 composites as enhanced electrochemical sensing platforms for hydrogen peroxide detection,Microchimica Acta

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Synthesis of dopamine-derived N-doped carbon nanotubes/Fe3O4 composites as enhanced electrochemical sensing platforms for hydrogen peroxide detection
Microchimica Acta ( IF 5.3 ) Pub Date : 2020-10-13 , DOI: 10.1007/s00604-020-04575-2
Yanan Zhao _{1,

2} , Danqun Huo ₁ , Liuyi Jiang ₁ , Shiying Zhou ₁ , Mei Yang ₁ , Changjun Hou _{1,

3}

Affiliation

A novel preparation of dopamine-derived N-doped carbon nanotubes/Fe3O4 composites (N-CNTs/Fe3O4 Cs) is demonstrated via facile hydrothermal route and calcination treatment. In this approach, dopamine was selected as N-containing precursor, which can promote Fe3O4 nanocrystal deposition uniformly on the surface of CNTs and effectively modulated the graphitic structure with doped pyridinic N and graphitic N to improve the electrochemical performance of carbon composites. More interestingly, the inhibited growth of the Fe3O4 crystal during calcination can be effectively avoided by soaking PDA-CNT/Fe3O4 Cs in a phosphate solution before calcination. The N-CNTs/Fe3O4 Cs have an enhanced electrocatalytic activity toward hydrogen peroxide with high sensitivity (316.27 mA M−1 cm−2) and wide linear range (0.006–2.057 mM). The N-CNTs/Fe3O4 Cs modified sensor was successfully applied to real-time detection of H2O2 released from living cancer cells, displaying a potential application in the study of oxidative stress-related diseases. This work demonstrates a rational way for high-performance electrocatalytic material synthesis and bioanalysis. Graphical abstract An enzyme-free biosensor of H2O2 was constructed on the basis of dopamine-derived N-doped carbon nanotubes/Fe3O4 composites (N-CNTs/Fe3O4 Cs), and it exhibited the enhanced electrocatalytic activity for H2O2 detection with high sensitivity, wide linear range, and outstanding reproducibility and stability. An enzyme-free biosensor of H2O2 was constructed on the basis of dopamine-derived N-doped carbon nanotubes/Fe3O4 composites (N-CNTs/Fe3O4 Cs), and it exhibited the enhanced electrocatalytic activity for H2O2 detection with high sensitivity, wide linear range, and outstanding reproducibility and stability.

中文翻译：

多巴胺衍生的 N 掺杂碳纳米管/Fe3O4 复合材料的合成作为用于过氧化氢检测的增强电化学传感平台

通过简便的水热途径和煅烧处理证明了多巴胺衍生的 N 掺杂碳纳米管/Fe3O4 复合材料（N-CNTs/Fe3O4 Cs）的新制备方法。在该方法中，选择多巴胺作为含氮前驱体，可以促进 Fe3O4 纳米晶在 CNT 表面均匀沉积，并通过掺杂吡啶 N 和石墨 N 有效调节石墨结构，以提高碳复合材料的电化学性能。更有趣的是，通过在煅烧前将 PDA-CNT/Fe3O4 Cs 浸泡在磷酸盐溶液中，可以有效避免煅烧过程中 Fe3O4 晶体的生长受到抑制。N-CNTs/Fe3O4 Cs 对过氧化氢具有增强的电催化活性，具有高灵敏度（316.27 mA M-1 cm-2）和宽线性范围（0.006-2.057 mM）。N-CNTs/Fe3O4 Cs 修饰的传感器成功应用于实时检测活体癌细胞释放的 H2O2，在氧化应激相关疾病的研究中具有潜在的应用价值。这项工作展示了一种用于高性能电催化材料合成和生物分析的合理方法。图形摘要基于多巴胺衍生的 N 掺杂碳纳米管/Fe3O4 复合材料 (N-CNTs/Fe3O4 Cs) 构建了一种无酶 H2O2 生物传感器，该传感器具有增强的 H2O2 检测电催化活性，具有高灵敏度、宽线性范围，以及出色的重现性和稳定性。基于多巴胺衍生的N掺杂碳纳米管/Fe3O4复合材料（N-CNTs/Fe3O4Cs）构建了无酶H2O2生物传感器，

更新日期：2020-10-13

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