《稀土氟化物上转换发光材料的制备》》-毕业论文.doc

PAGE 编号 本科生毕业论文 稀土氟化物上转换发光材料的制备 Preparation of Rare Earth-Doped Fluorides on the upconversion of luminous materials 学 生 姓 名 专 业 化学工程与工艺 学 号 指 导 教 师 学 院 化学与环境工程学院 摘 要 本文简要的概述了稀土离子掺杂氟化物的上转换发光材料的历史，以及研究现状和发展前景。采用十六烷基三甲基溴化铵（CTAB）/第二辛醇/水（或盐溶液）的微乳液体系方法制备出了BaF2:Yb3+,Er3+纳米上转换发光材料。通过X射线衍射（XRD）确定了所制备样品的结构，并运用谢乐公式计算了样品的粒径，结果表明其粒径均在纳米范围之内，上转换纳米粒子的形貌为球形，粒径大约21 nm。用荧光光谱仪进行测试，发现BaF2:Yb3+,Er3+纳米微粒在1540nm左右（4I13/2→4I15/2）出现了发射峰。在常温下用980nm激光器激发样品，样品发出红光和绿光，并讨论了不同Yb3+,Er3+ 配比对上转换发光强度的影响。 关键词：上转换发光 纳米氟化物 微乳液 稀土离子 ABSTRACT This dissertation briefly outlined the rare-earth ion doped fluoride on the history of upconversion of luminous materials, and study the status and development prospects. Use cetyltrimethylammonium bromide (CTAB) /The second octanol/ water (or salt solution) microemulsion system prepared the BaF2: Yb3+, Er3+ nano-conversion luminous materials. X-ray diffraction (XRD) determined by the structure of the sample, and use the Debye-Scherrer equation to Calculate the sample size, the results showed that both in its size within the scope of nanotechnology,On the conversion of nanoparticles for spherical shape, size of about 21 nm. By fluorescence spectrometer for testing and found that BaF2: Yb3+, Er3+ nanoparticles in the 1540 nm around (4I13/2 → 4I15/2) in the emission peak. At ordinary temperature with 980 nm laser excitation samples, samples sent red and green, and discussed the impact about the different ratio Yb3+, Er3+ to the luminous intensity of upconversion. Key words: Upconversion luminescence; Fluoride nanoparticles; Microemulsions; Rare-earth ions 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc202404180 摘 要 PAGEREF _Toc202404180 \h II HYPERLINK \l _Toc202404181 ABSTRACT PAGEREF _Toc202404181 \h III HYPERLINK \l _Toc202404182 目 录 PAGEREF _Toc202404182 \h IV HYPERLINK \l _Toc202404183 第一章 绪 论 PAGEREF _Toc202404183 \h 1 HYPERLINK \l _Toc202404184 1.1 引言 PAGEREF _Toc202404184 \h 1 HYPERLINK \l _Toc202404185 1.2 上