材料学专业 水热法合成上转换荧光纳米材料VIP专享

水热法合成上转换荧光纳米材料【摘要】上转换荧光纳米材料是一种又特殊又重要的稀土发光材料，它因具有独特的上转换发光性能，在荧光标记和生物检测等方面越来越受到人们的重视。其中以 NaYF4 为基质的掺杂 Er3+离子和 Yb3+离子的上转换发光纳米材料作为一种新型荧光标记物，被人们认为目前发光性能最好的并且最适合用于生物体内的材料。稀土上转换发光纳米材料不仅化学稳定性好，荧光量子产率高，还有它在生物体内的毒性低，荧光寿命长。本论文采用水热合成法制备出稀土掺杂的 NaYF4 上转换发光材料，然后通过单因素优选法考察水热反应时间、水热反应温度，表面活性剂的种类以及它的比例，OA: NaOA 的比例等因素对荧光纳米材料发光性能的影响，通过正交试验法对制备条件进行了进一步优化，得到了最佳制备条件，在此最佳制备条件下制备出荧光效果最好最稳定的上转换荧光纳米材料，并对其进行 X 射线衍射分析、扫描电镜分析、荧光光谱分析以及相应的讨论。【关键词】上转换荧光纳米材料，稀土离子，NaYF4：Er3+，Yb3+，表面活性剂，荧光强度AbstractUp-conversion fluorescent nanomaterials are special and important rare earth luminescent materials. Because of their unique up-conversion luminescence properties, they have received more and more attention in fluorescent labeling and biological detection. Among them, NaYF4-based up-conversion luminescent nanomaterials doped with Er3+ and Yb3+ ions as a new type of fluorescent label are considered to have the best luminescent properties and are most suitable for use in vivo. The rare earth up-conversion luminescence nanomaterial not only has good chemical stability, high fluorescence quantum yield, but also has low toxicity in vivo and long fluorescence lifetime.In this dissertation, the rare earth doped NaYF4 up-conversion luminescent materials were prepared by hydrothermal synthesis method. Then the hydrothermal reaction time, hydrothermal reaction temperature, surfactant type, OA ：NaOA ratio and other factors were investigated by single factor optimization m...