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首页> 外文期刊>RSC Advances >A novel δ-MnO2 with carbon nanotubes nanocomposite as an enzyme-free sensor for hydrogen peroxide electrosensing
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A novel δ-MnO2 with carbon nanotubes nanocomposite as an enzyme-free sensor for hydrogen peroxide electrosensing

机译：具有碳纳米管的新型δ-MnO2，纳米复合物作为用于过氧化氢电解的无酶传感器

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摘要

We have reported the synthesis and application of a δ-MnO _(2) with carbon nanotubes (δ-MnO _(2) /CNTs) nanocomposite as an enzyme-free sensor for the detection of H _(2) O _(2) through an electroreduction reaction, where δ-MnO _(2) serves as the catalytic center and CNTs as the highly conductive base material. The δ-MnO _(2) /CNTs nanocomposite was synthesized via a simple and single-step hydrothermal process in alkaline solution without using any surfactants or templates. The electrochemical properties of the δ-MnO _(2) /CNTs on a glassy carbon electrode were investigated by cyclic voltammetry, and amperometry. It was found that, under optimized conditions, the sensor fabricated electrode provides linear amperometric responses for H _(2) O _(2) in a large concentration range from 0.05 to 22 mM and a detection limit of 1 μM with a comparatively high sensitivity of 243.9 μA mM ~(?1) cm ~(?2) . In addition, the δ-MnO _(2) /CNTs modified GCE exhibits excellent selectivity, and good reproducibility for H _(2) O _(2) detection. It is promising that the proposed H _(2) O _(2) sensor can be used as an effective tool to measure the H _(2) O _(2) in practical samples.
机译：我们已经报道了用碳纳米管（δ-mnO _（2）/ cnts）纳米复合材料作为酶传感器的合成和施加，用于检测H _（2）O _（2 ）通过电荷反应，其中δ-mnO _（2）用作催化中心和CNT作为高导电基材。通过在碱性溶液中的简单和单步水热法合成δ-MnO _（2）/ CNT纳米复合材料，而不使用任何表面活性剂或模板。通过循环伏安法研究玻璃碳电极上的δ-mnO _（2）/ cnts的电化学性质，和电流测量。发现，在优化条件下，传感器制造的电极在大浓度范围内为H _（2）O _（2）的线性排水响应提供0.05至22mm，并且具有相对高的灵敏度为1μm的检测限243.9μAmm〜（？1）cm〜（？2）。另外，Δ-mnO _（2）/ CNTs改性的GCE表现出优异的选择性，以及对H _（2）O _（2）检测的良好再现性。很高兴提出的H _（2）O _（2）传感器可以用作测量实际样本中H _（2）O _（2）的有效工具。

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