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首页> 外文期刊>Electroanalysis >Cu(II)-Based MOF Immobilized on Multiwalled Carbon Nanotubes: Synthesis and Application for Nonenzymatic Detection of Hydrogen Peroxide with High Sensitivity
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Cu(II)-Based MOF Immobilized on Multiwalled Carbon Nanotubes: Synthesis and Application for Nonenzymatic Detection of Hydrogen Peroxide with High Sensitivity

机译：固定在多壁碳纳米管上的基于Cu（II）的MOF：高灵敏度过氧化氢的非酶法检测方法的合成与应用

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摘要

Cu(II)-based MOF (Cu-bipy-BTC, bipy=2,2’-bipyridine, BTC=1,3,5-tricarboxylate) was synthesized and immobilized on multiwalled carbon nanotubes. The prepared composite was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS) and IR spectra. Then the material was modified onto the surface of a glassy carbon electrode, and showed a couple of well-defined redox peaks in a phosphate buffer solution (pH 6.0), ascribed to the redox process of Cu~(II/I) in the Cu-bipy-BTC. The modified electrode was then applied to fabricate a non-enzymatic hydrogen peroxide biosensor. The sensor showed good electrocatalytic activity toward the reduction of hydrogen peroxide with a wide linear range (3–70 mmolL~(-1) and 70–30000 μmolL~(-1)) and a detection limit of 0.46 μmolL~(-1), as well as good stability and repeatability. In addition, the sensor has been successfully applied to determine hydrogen peroxide in water samples with good accuracy. Thus, the Cu-bipy-BTC/MWCNTs composite has great potential for applications in electrochemical sensors.
机译：合成了基于Cu（II）的MOF（Cu-bipy-BTC，bipy = 2,2'-联吡啶，BTC = 1,3,5-三羧酸盐）并将其固定在多壁碳纳米管上。通过扫描电子显微镜（SEM），X射线衍射（XRD），X射线光电子能谱（XPS）和IR光谱来表征所制备的复合材料。然后将该材料修饰到玻璃碳电极的表面上，并在磷酸盐缓冲溶液（pH 6.0）中显示出两个明确定义的氧化还原峰，这归因于Cu〜（II / I）在Cu中的氧化还原过程。 -bipy-BTC。然后将修饰的电极应用于制造非酶促过氧化氢生物传感器。该传感器显示出良好的对过氧化氢还原的电催化活性，线性范围宽（3-70 mmolL〜（-1）和70-30000μmolL〜（-1）），检出限为0.46μmolL〜（-1）。 ，以及良好的稳定性和可重复性。此外，该传感器已成功应用于高精度测定水样中的过氧化氢。因此，Cu-Bipy-BTC / MWCNTs复合材料在电化学传感器中具有巨大的应用潜力。

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