模板辅助法制备稀土微纳米荧光材料及其性能研究

发布时间：2019-07-09 09:37

【摘要】：稀土发光材料由于其优良的光学性质,已成为国内外研究的热点。本论文分别通过消耗模板法与聚合物模板法制备稀土微纳米荧光材料,分别对产品形貌、荧光性能和进行了系统的研究,得到了预期的实验结果,主要研究结果如下:成功的使用具有一定晶体形态微球模板通过水热反应,制备出粒径约为1μm的单分散近球体YBO_3:Ln~(3+)(Ln=Eu,Tb)荧光材料。通过XRD、TEM、PL等进行了表征。通过对所制备的荧光粉进行发光及寿命分析,结果表明近球体YBO_3:5%Eu~(3+)荧光粉具有优良的红橙比,是优良的红色荧光粉材料;近球体YBO_3:5%Tb3+荧光粉显示出良好的绿色光发射性能。采用弱交联的聚合物MF作为模板,然后使用尿素沉淀法制备出和壳结构的前驱体,然后通过水热途径使碱式碳酸钇与磷酸二氢铵反应生成YPO_4:Eu~(3+),而聚合物模板MF被反应过程中产生的铵根离子作用,生成可溶于水的小分子,从而在水热的过程中将模板除去成功制得中空的YPO_4:Eu~(3+)微球。从SEM与TEM照片中可以看出所制备的产品形貌均一,分散性良好,可以明显观察到中空结构;经过荧光分析可以得知,所制备的产品具有良好的荧光发射性能,且色纯度高,显色性好,性能稳定。以带正电荷的三聚氰胺甲醛树脂(MF)为模板,经过St?ber法进行SiO_2包覆后,将稀土前驱体沉积在复合微球表面,经过高温煅烧,形成SiO_2@Y_2O_3:Eu~(3+)中空复合微球。制备过程操作简单,所得产品形貌完整,粒径均一。通过XRD,SEM,TEM及BET对所得产物进行表征分析,证实SiO_2@Y_2O_3:Eu~(3+)中空复合微球具有预期的形貌和结构,其比表面积约为202.8m2/g。经过SiO_2@Y_2O_3-IBU对模型药物IBU的在PBS缓冲溶液中的释放测试,产物具有一定的药物缓释性能。
[Abstract]:The rare-earth luminescent material has become a hot spot at home and abroad due to its excellent optical properties. In this paper, rare-earth micro-nano-fluorescent materials were prepared by the method of consuming template and the polymer template method, respectively. The product morphology, the fluorescence property and the research of the system were studied, and the expected experimental results were obtained. The main results are as follows: A single-dispersed near-sphere YBO _ 3: Ln ~ (3 +) (Ln = Eu, Tb) fluorescent material with a particle size of about 1. m It was characterized by XRD, TEM, PL and so on. The results show that the near-sphere YBO _ 3:5% Eu ~ (3 +) phosphor has excellent red-orange ratio, and it is a good red phosphor material. The near-sphere YBO _ 3:5% Tb3 + fluorescent powder shows good green light emission performance. a weakly cross-linked polymer MF is used as a template, a precursor of the shell structure is prepared by using a urea precipitation method, And a small molecule soluble in water is generated, so that a hollow YPO _ 4: Eu ~ (3 +) microsphere is prepared successfully during the hydrothermal process. From the SEM and TEM photographs, the prepared product has the advantages of uniform morphology and good dispersibility, and can obviously observe the hollow structure; and after the fluorescence analysis, the prepared product has good fluorescence emission performance, high color purity, good color rendering property and stable performance. The rare-earth precursor was deposited on the surface of the composite microspheres after the coating of SiO _ 2 by the St? ber method, and the SiO_2@Y_2O_3: Eu ~ (3 +) hollow composite microspheres were formed after the coating of SiO _ 2 by the St? ber method. The preparation process has the advantages of simple operation, complete appearance of the obtained product and uniform particle size. The results were characterized by XRD, SEM, TEM and BET. It was confirmed that the SiO_2@Y_2O_3: Eu ~ (3 +) hollow composite microspheres had the expected morphology and structure, and the specific surface area was about 202.8 m2/ g. The release test of the SiO_2@Y_2O_3-IBU model drug IBU in the PBS buffer solution is tested, and the product has certain drug sustained-release performance.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ422

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