复杂条件下稀土纳米材料的合成及其性能研究

Rare earth materials have been widely used in various areas such as luminescent, magnetic, and catalytic materials due to their unique properties, and have been an extensive research field of nanomaterials. To date, rare earth nanomaterials are mainly synthesized by some common methods, such as hydro/solvothermal, co-precipitation, and so on. Based on our work on the synthesis of a series of rare earth nanomateials, this program is aiming at fabricating several europium nanomaterials under the co-assistance of microwave, ultrasonic wave and ultraviolet light. Experiments will be carried out to investigate the effect of synthesis conditions on the nanomaterials so as to optimize these synthesis conditions and the formation mechanism will also be explored. The optical property will be tested and evaluated, and the relationship between structure and optical property will be studied after the successful preparation of a series of europium nanomaterials, which will provide instructions for the synthesis of function-oriented synthesis of rare earth nanomaterials. After that, other rare earth nanomaterials will be synthesized and their properties will be studied. A series of nanomaterials with novel structure and excellent properties may be obtained in this work. Furthermore, this work may provide method and experimental instructions for the preparation of other nanomaterials, and is of great theoretical and applicable importance.

稀土纳米材料具有优异的光学、磁学、催化等性质,已被广泛应用在现代先进材料及器件的各个领域，是纳米材料研究的热点领域之一。当前，稀土纳米材料的合成主要采用水（溶剂）热、共沉淀法等一些常规方法。在成功合成系列稀土纳米材料的基础上，本项目拟以几种常见的铕化合物为研究对象，探讨微波、超声波和紫外光协同作用的复杂条件下其纳米结构的合成。考察各反应条件对材料合成的影响，找出合成的较佳条件，获得各因素对材料合成影响的规律，对材料合成的机理进行探索。在成功合成系列铕纳米材料的基础上，对其光学性能进行测试和评价，找出材料结构与性能之间的关系和规律，从而为功能导向稀土纳米材料的合成提供指导。在此基础上进行其它一些稀土纳米材料的合成及性能研究。有望获得系列具有新颖结构和性能的材料，并为其它具有特殊结构和性能的纳米材料的合成提供方法路线和实验依据，丰富纳米材料的合成方法和路线，具有很好的理论研究和实际应用价值。

研究集中于稀土纳米材料的合成及其性能研究，主要内容包括：球形Gd2Sn2O7纳米颗粒的合成及其磁学性能研究和Gd2Sn2O7:Eu3+的发光性质，反应温度，反应时间，pH和不同的碱源对产物形成过程都有影响，并在此基础上合成了其它一系列稀土锡酸盐；合成了DyPO4•1.5H2O，考察了微波、超声和紫外光对合成的影响，并测试了材料的磁学性能；得到了两种新颖的可用于核磁成像、荧光成像和自噬诱导的镧系元素掺杂的纺锤形介观晶体YF3:Ce,Eu,Gd和YF3:Ce,Tb,Gd；采用低温熔盐法合成了铕基配位聚合物纳米片，并考察了的了其发光性质；设计合成了一个新的具有近红外荧光性质双核铒(III)配合物，并获得了该配合物的准确结构；通过煅烧铈基配位聚合物得到了多壳CeO2空心结构,其对罗丹明B的光催化降解表现出优秀催化性能；在较低温度下快速合成了花状Ce-PMDA配位聚合物。并通过煅烧使之转化为CeO2。项目的实施为其它纳米材料的制备提供了实验依据。