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首页> 外文期刊>RSC Advances >Synthesis of Ag-HNTs-MnO2 nanocomposites and their application for nonenzymatic hydrogen peroxide electrochemical sensing
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Synthesis of Ag-HNTs-MnO2 nanocomposites and their application for nonenzymatic hydrogen peroxide electrochemical sensing

机译：Ag-HNTs-MnO2纳米复合材料的合成及其在非酶双氧水电化学传感中的应用

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Natural halloysite nanotubes (HNTs) were attached to the flower-like MnO2 and HNTs-MnO2 composites were obtained, then silver nanoparticles were successfully deposited on the surface of HNTs-MnO2 to produce Ag-HNTs-MnO2 nanocomposites and they were used for fabricating a non-enzymatic hydrogen peroxide (H2O2) sensor. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy and Fourier transform infrared spectroscopy were applied to investigate the structures and morphologies of the resultant samples. The Ag-HNTs-MnO2 composite-based modified electrode exhibited high eletrocatalytic activity to the reduction of H2O2 with a linear range of 2.0 mu M to 4.71 mM, a detection limit of 0.7 mu M (S/N = 3) and a sensitivity of 11.9 mu A mM(-1) cm(-2). In addition, high specific surface area, low cost and good biocompatibility gives the modified electrode a bright perspective in biosensors and biocatalysis.
机译：将天然埃洛石纳米管（HNTs）附着在花状MnO2上，制得HNTs-MnO2复合材料，然后将银纳米颗粒成功沉积在HNTs-MnO2的表面上，制备出Ag-HNTs-MnO2纳米复合材料，并将其用于制造非酶过氧化氢（H2O2）传感器。扫描电子显微镜，能量色散X射线光谱，透射电子显微镜和傅里叶变换红外光谱被用来研究所得样品的结构和形态。 Ag-HNTs-MnO2复合基修饰电极对H2O2的还原具有很高的电催化活性，线性范围为2.0μM至4.71mM，检测极限为0.7μM（S / N = 3），灵敏度为。 11.9微米mM（-1）cm（-2）。此外，高比表面积，低成本和良好的生物相容性使改性电极在生物传感器和生物催化领域具有广阔的前景。

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