精编完整版基于ZnO的复合纳米材料的电化学传感器研究 - 本科毕业论文设计 - 图文

SHANGHAI UNIVERSITY

毕业设计（论文）

题目：

UNDERGRADUATE PROJECT (THESIS)

基于ZnO的复合纳米材料的电化学传感器研究

基于ZnO的复合纳米材料的电化学传感

器研究

摘 要

本文主要介绍了利用较为简单、快速的微波辅助多元醇法来制备多形貌Ag纳米采用微波法制备Ag/ZnO复合材料。将制备而成的纳米ZnO和纳米ZnO-Ag修饰到碳糊电极上，研究该纳米复合材料修饰碳糊电极对酪氨酸氧化的电化学行为，并与裸电极进行比较。这是首次利用以纳米ZnO为基体合成纳米复合材料来构建非酶的酪氨酸传感器。通过扫描电镜和X-射线衍射对Ag纳米线和纳米ZnO-Ag颗粒的形态与结构进行表征。修饰后的传感器通过循环伏安法和时间-电流曲线法，对酪氨酸进行检测。传感器对酪氨酸的氧化表现出了灵敏度高（1746.50 μAmM-1cm-2),检出限低（0.022 μM）和线性范围宽（线性范围从0.05 μM到1.00 mM）等特点。通过优化实验条件后，在最佳条件下制作过氧化氢工作曲线。此外，该传感器还可用于实际样品的检测，证明了该方法的可行性。

关键词：纳米复合材料 酪氨酸传感器 纳米氧化锌 纳米氧化锌包银 修饰电极

ABSTRACT

This paper describes the use of relatively simple and fast microwave-assisted polyol method to prepare multiple morphologies were prepared by microwave Ag nano-Ag / ZnO Composite Materials. Study the Nano composites prepared from nano-ZnO and nano-ZnO-Ag-modified carbon paste electrode modified carbon paste electrode of tyrosine oxidation of the electrochemical behavior of bare electrode compared. This is the first use of nano-ZnO matrix synthesis of nano-composite materials to build a non-enzymatic tyrosine sensor. The form and structure of the nano-ZnO and nano-ZnO-Ag particles were characterized by scanning electron microscopy and X-ray diffraction. The modified sensor by cyclic voltammetry and amperometric tyrosine detection. Sensor tyrosine oxidation showed a high sensitivity (1746.50 μAmM-1cm-2), low detection limit (0.022 mM) and wide linear range (linear range from 0.05 micron to 1.00 mM), and so on. Through optimization of the experimental conditions, the hydrogen peroxide produced under optimum conditions the working curve. In addition, the sensor can also be used for the detection of the actual sample to prove the feasibility of the proposed method。

Keywords: Nano composites Tyrosine sensor Nano-zinc oxide

Nanometer zinc oxide silver-wrapped Modified electrode

目 录

绪 论 ................................................................................................................................ 1 1．综 述 .......................................................................................................................... 2

1.1 纳米复合材料 ................................................................................................... 2

1.1.1 纳米复合材料的发展与现状 ................................................................ 2 1.1.2 纳米复合材料的制备方法 .................................................................... 4 1.1.3 纳米复合材料的特性 ............................................................................ 5 1.1.4 纳米复合材料的应用 ........................................................................... .6 1.2 国内外对酪氨酸测定方法的研究 ................................................................... 8

1.2.1 化学法 .................................................................................................... 8 1.2.2 分光光度法 ............................................................................................ 9 1.2.3 高效色谱法 ............................................................................................ 9 1.2.4 毛细管电泳法 ........................................................................................ 9 1.2.5 电化学法 .............................................................................................. 10

2．实验部分 .................................................................................................................. 11

2.1 实验试剂与仪器 ............................................................................................. 11

2.1.1 实验试剂： .......................................................................................... 11 2.1.2 实验仪器： .......................................................................................... 11 2.2 实验方法 ......................................................................................................... 11

2.2.1 循环伏安法 .......................................................................................... 11 2.2.2 电流-时间曲线 .................................................................................... 12 2.3 纳米Ag及纳米ZnO包Ag的制备及表征 ..................................................... 12

2.3.1 Ag纳米线的制备 ................................................................................. 12 2.3.2 Ag纳米线的表征 ................................................................................. 13 2.3.3 纳米ZnO-Ag的制备 ............................................................................ 15 2.3.4 纳米ZnO-Ag的表征 ............................................................................ 15 2.4 纳米Ag及纳米ZnO-Ag修饰电极的制备 ..................................................... 17

2.5 酪氨酸氧化的反应机理 ................................................................................. 18 2.6 优化实验条件 ................................................................................................. 19

2.6.1 优化电位 .............................................................................................. 19 2.6.2 优化氢氧化钠浓度 .............................................................................. 20 2.6.3 优化修饰剂浓度 .................................................................................. 21 2.7 制作工作曲线 ................................................................................................. 22 2.8 电极的重复性、稳定性和抗干扰性测定 ..................................................... 23 2.9 实际样品分析 ................................................................................................. 24 3.结论与展望..................................................................................................................24 参考文献 ........................................................................................................................ 25 致谢 ................................................................................................................................ 27

本文来源：https://www.bwwdw.com/article/7h6h.html