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.doc

PAGE 23 SHANGHAI 毕业设计（论文） UNDERGRADUATE PROJECT (THESIS) 题目：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 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 TOC \o 1-3 \h \u 色氨酸!酪氨酸和苯丙氨酸都是在紫外区有吸收的常见氨基酸,用紫外分光光度法测定时,因其吸收光谱严重重叠,需要采用一定的数学方法这些方法中所用仪器较贵,且三种氨基酸往往相互干扰电分析化学是根据物质在溶液中的电化学性质及其变化建立的一类分析方法,特别是现代仪器分析与计算机联