电化学沉积法论文：ZnO一维纳米结构的制备及其pH传感特性的研究.doc

电化学沉积法论文：ZnO一维纳米结构的制备及其pH传感特性的研究【中文摘要】ZnO是一种-族宽禁带直接带隙半导体材料。其晶体结构是六方纤锌矿结构,天然存在着锌间隙和氧空位缺陷。ZnO是一种新型的多功能半导体材料,在压电性、导电性、传感性、气敏性等方面具有良好的优越的性能。在激光器、传感器、太阳能电池等方面有着广阔的应用前景。ZnO是两性氧化物,在溶液中能够引起电动势和电流的变化。利用ZnO这一独有的化学特性可作为检测溶液pH值的标准。目前pH化学传感器仍在研究发展阶段,而ZnO一维纳米材料的研究正朝着实际应用方面发展,因此ZnO pH传感特性的研究具有重要的研究意义。本文利用电化学沉积设备的三电极系统,以ITO导电玻璃为衬底,制备了ZnO一维纳米材料和Co掺杂的ZnO一维纳米材料,应用SEM、XRD、PL、EDS、XPS等测试手段对样品的表面形貌、晶体结构、发光性质和样品组分进行分析及表征。结果表明,用电化学沉积法制备的ZnO一维纳米材料的晶体质量较好,Co2+已经成功掺杂到ZnO晶格当中。利用电化学循环伏安法,分析ZnO一维纳米材料和Co掺杂的ZnO一维纳米材料的pH传感特性,获得了pH值与电流、电压的关系。【英文摘要】ZnO is a-semiconductor compound materials with a wide direct band gap. And the crystalline structure is hexagonal wurtzite structure, exist natively zinc interstitial atom and oxygen vacancies defects. ZnO is a new multi-functional semiconductor material, with piezoelectricity, electrical conductivity, sensing properties, gas sensitivity and a lot of other superior performances, it has wide application prospects in lasers, sensors, solar battery and other fields. ZnO is an amphoteric oxide, it can cause electromotive force and currents changes in solution. Making use of ZnO which has unique chemical properties can be as the test solution pH value of the standard. At present the pH chemical sensors are still studying the development stage, ZnO one-dimensional nano-materials are heading for the practical application of research development. Therefore, it has an important significance for the research of ZnO pH sensing properties.In this thesis,ZnO one-dimensional nano-materials and Co-doped ZnO one-dimensional nano-materials were prepared on ITO conductive glass substrate with three-electrode electrochemical deposition system. SEM, XRD, PL, EDS and XPS were applied to characterize the surface topography, crystal structure, luminescence properties and components of the samples. The results show that the prepared ZnO nano-material has a good crystal quality using electrochemical deposition techniques. Co ions have been successfully doped into the ZnO lattice. The pH sensing properties of the ZnO one-dimensional nano-materials and Co-doped ZnO one-dimensional nano-materials were analysed by electrochemical cyclic voltammetry. The relationship between pH value and current and voltage was obtained.【关键词】电化学沉积法 ZnO纳米棒 掺杂 pH传感特性【英文关键词】Electrochemical deposition method ZnO nanorod doping pH sensing property【目录】ZnO一维纳米结构的制备及其pH传感特性的研究摘要4-5ABSTRACT5目录6-7第一章 绪论7-211.1 引言7-81.2 ZnO一维纳米材料的基本性质和研究进展8-121.3 ZnO一维纳米材料的制备方法12-171.4 ZnO一维纳米材料在pH传感特性方面的研究进展17-201.5 本论文主要研究内容20-21第二章 实验方法与表征手段21-342.1 电化学沉积法的基本原理21-222.2 电化学沉积ZnO纳米棒的实验方案22-252.3 表征手段25-302.4 电化学循环伏安法的基本原理30-322.5 ZnO纳米一维材料pH传感特性的实验方案32-332.6 本章小结33-34第三章 电化学沉积法制备ZnO一维纳米材料34-433.1 电化学沉积法制备ZnO纳米棒34-363.2 电化学沉积法制备Co掺杂的ZnO纳米棒36-393.3