精品文档---下载后可任意编辑Yb3+Er3+共掺 TiO2 上转换光致发光材料的制备与表征的开题报告题目：Yb3+Er3+共掺 TiO2 上转换光致发光材料的制备与表征摘要：随着能源危机日益严重和环境污染问题的加剧，节能减排已经成为了全球共同关怀的重要问题。纳米材料的讨论已经成为了新材料领域的讨论热点，因为它们可以通过能量转换的方式实现能量的高效利用。本文主要讨论 Yb3+Er3+共掺 TiO2 上转换光致发光材料的制备与表征。首先，通过溶胶-凝胶法制备出具有纳米结构的 TiO2 薄膜；其次，通过化学共沉淀法制备出 Yb3+Er3+共掺 TiO2 纳米粉末，并利用 X 射线衍射仪、透射电子显微镜、元素分析仪等测试手段对其进行表征。结果表明，制备的 Yb3+Er3+共掺 TiO2 纳米粉末具有良好的荧光性能，表现为蓝、绿、红三种色彩的光发射，且发光强度与掺杂浓度有着一定的关系。此外，对制备过程中产物进行表征，发现掺杂浓度的增加会导致晶体的颗粒尺寸变大，晶格常数也会随之发生改变，这些结构性改变，对材料的性能产生了一定的影响。关键词：Yb3+Er3+共掺 TiO2，溶胶-凝胶法，化学共沉淀法，荧光性能，表征分析。Abstract:With the increasingly serious energy crisis and environmental pollution, energy conservation and emission reduction has become an important issue of global concern. The study of nanomaterials has become a hot research topic in the field of new materials, because they can achieve efficient energy utilization through energy conversion.This paper mainly studies the preparation and characterization of Yb3+Er3+ co-doped TiO2 upconversion luminescent materials. Firstly, TiO2 films with nanostructure were prepared by sol-gel method. Secondly, Yb3+Er3+ co-doped TiO2 nanometer powder was prepared by chemical co-precipitation method, and it was characterized by X-ray diffraction, transmission electron microscope, and elemental analyzer.精品文档---下载后可任意编辑The results show that Yb3+Er3+ co-doped TiO2 nanometer powder prepared has good fluorescence properties, showing blue, green, and red light emissions, and the luminescence intensity has a certain relationship with the doping concentration. In addition, it was found that the increase of doping concentration will cause the particle size of the crystal to increase in the preparation process, and the lattice constant will also undergo changes. These structural changes have certain influences on the properties of the material.Keywords: Yb3+Er3+ co-doped TiO2, sol-gel method, chemical co-precipitation method, fluorescence properties, characterization analysis.
