作　　者： ;

机构地区： 华南理工大学轻工与食品学院

出　　处： 《化学研究与应用》 2020年第5期819-824,共6页

摘　　要： 本文制备了纳米氧化锌负载镍修饰电极,并将其应用于葡萄酒中甘油的检测。首先通过直接沉淀法合成氧化锌纳米粒子,并采用扫描电子显微镜和X-射线衍射仪对制备的氧化锌纳米粒子进行微观结构表征。然后,利用电化学合成法使镍纳米粒子均匀负载在氧化锌纳米粒子表面以制备具有甘油催化作用的修饰电极,采用循环伏安法研究了该修饰电极的电化学性能及最优操作条件。结果表明,反应溶液pH值为13.5时,该修饰电极性能最优,该修饰电极的反应过程为扩散控制过程;该修饰电极的线性检测范围为0.2 mM^60 mM,检测限为7.35×10^-5 mol·L^-1(S/N=3),灵敏度为42.02 mA/(mol·cm^2)。另外,该修饰电极具有很强的抗干扰和样品检测能力,可应用于葡萄酒中甘油含量的快速检测。 In this paper,the nano zinc oxide/nickel modified electrode was prepared and applied to the detection of glycerol.Firstly,the zinc oxide nanoparticles were synthesized by a direct precipitation method,and the structure of the prepared zinc oxide nanoparticles was characterized by a scanning electron microscope and an X-ray diffractometer.Then,the electrochemical synthesis method was used to uniformly load nickel nanoparticles on the surface of zinc oxide nanoparticles to prepare a modified electrode for glycerol catalysis.The electrochemical performance and optimal operating condition of the modified electrode were studied by cyclic voltammetry.The results showed that the performance of the modified electrode was optimal when the pH of the reacting solution was 13.5;the reaction process on the modified electrode was controlled by diffusion;the linear detection range of the modified electrode was from 0.2 mM to 60 mM,the detection limit was 7.35×10^-5 mol·L^-1(S/N=3),and the sensitivity was 42.02 mA/(mol.cm^2).In addition,the modified electrode had strong ability of anti-interference and could be applied to the rapid glycerol detection in wine.

关 键 词： 纳米氧化锌 镍 修饰电极 葡萄酒 甘油

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