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首页> 外文期刊>International Journal of Electrochemical Science >One-step Construction of Sensor Based on Nanocomposite of Platinum and Chitosan Formed by Electrodeposition and Its Application for Determination of Nitrite
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One-step Construction of Sensor Based on Nanocomposite of Platinum and Chitosan Formed by Electrodeposition and Its Application for Determination of Nitrite

机译：电沉积形成的铂与壳聚糖纳米复合材料的一步法构建及其在亚硝酸盐测定中的应用

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摘要

A novel platinumhitosan nano-composite (Pt-CS) was synthesized by electrochemical co-depositionat a glassy carbon electrode (GCE) for fabrication of a nitrite sensor, Pt-CS/GCE. The depositionformed a nanocomposite modified surface layer on the GCE, which was characterized by X-rayphotoelectron spectroscopy (XPS), X-ray diffraction (XRD) and field emission scanning electronmicroscope (SEM). It was found that the Pt-CS nano-composite generated flower-like sphericalparticles with sizes of about 250 nm, which was consisted of Pt nanoparticles with sizes smaller than10 nm, suggesting that the chitosan molecules were covered on the surface of Pt nanoparticles to forma core-shell structure. The electrocatalytic activity and sensing ability of the modified electrode wasinvestigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and differential pulseamperometry (DPA). It demonstrated that the electrode was excellent for catalytic determination ofnitrite with good reproducibility, good stability and fast response. The detection limit was found to be-7 -7 -3 1.50 M and the linear concentration range is 9.90 to 7.510 M.
机译：通过在玻璃碳电极（GCE）上进行电化学共沉积，合成了新型的铂-壳聚糖纳米复合材料（Pt-CS），用于制备亚硝酸盐传感器Pt-CS / GCE。沉积物在GCE上形成了纳米复合材料改性的表面层，其特征在于X射线光电子能谱（XPS），X射线衍射（XRD）和场发射扫描电子显微镜（SEM）。结果发现，Pt-CS纳米复合物产生的花状球形颗粒约250 nm，由粒径小于10 nm的Pt纳米颗粒组成，表明壳聚糖分子被覆盖在Pt纳米颗粒表面形成了形态。核-壳结构。通过循环伏安法（CV），差动脉冲伏安法（DPV）和差动脉冲安培法（DPA）研究了修饰电极的电催化活性和感测能力。结果表明，该电极具有良好的重现性，稳定性和快速响应性，是用于亚硝酸盐催化测定的优异电极。发现检测限为-7 -7 -3 1.50 M，线性浓度范围为9.90至7.510M。

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