静电纺丝法制备一维纳米稀土氧化物和钒酸盐发光材料及其性质研究

发布时间：2018-04-12 21:17

  本文选题：纳米结构 + 静电纺丝过程　； 参考：《东北师范大学》2011年硕士论文

【摘要】：近年来,一维新型纳米结构材料以其独特的荧光特性在纳米级别的电子学、光学、显示器和先进生物分析上的广泛应用而受到研究者极大的重视。因此,寻找出制备完美形貌的纳米荧光材料的简单方法是非常重要的。而溶胶凝胶过程和电纺丝技术相结合的方法是制备一维和准一维纳米材料的有效方法。本论文采取了这种新颖方法制备出了具有完美形貌的一维纳米纤维。 本文利用静电纺丝法制备出一系列的一维纳米发光材料,例如:稀土氧化物纳米纤维和钒酸盐纳米纤维。利用X-射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、红外光谱(FT-IR)、差热-热重分析(TG-DTA)等技术对合成材料的结构、形貌、组成进行表征,用荧光光谱、低压阴极射线光谱等手段来评价所制备的材料的发光性质。同时就离子掺杂浓度对发光强度的影响做了进一步的讨论。 采用静电纺丝法制备了具有一维结构的Lu_2O_3:Eu~(3+)纳米纤维荧光粉。X-射线衍射(XRD)、红外光谱(FT-IR)和差热热重(TG-DTA)研究结果表明,Lu_2O_3:Eu~(3+)样品在900℃结晶,通过FESEM可以看出所制备的样品都是均匀的纤维状。TEM进一步表明了所制备的样品是由许多纳米粒子堆积而成的。在紫外光和低压电子束的激发下,样品发出强的红光。 采用简单、方便的静电纺丝方法成功制备了一维GdVO4:Ln~(3+)(Ln=Eu,Dy,Sm)纳米纤维。所得到的GdVO_4:Ln~(3+)(Ln=Eu,Dy,Sm)纳米纤维在700℃结晶完好。从扫描电镜结果可知,所制备的前驱纤维比较均匀且表面平滑,经过700℃煅烧4个小时后,纤维直径大幅减小并且仍然保持原来的纤维状,但表面变得粗糙了。光致发光和阴极射线发光光谱表明,GdVO_4:Ln~(3+)纳米纤维由于钒酸根向其掺杂离子的有效能量传递都表现出这些离子典型的特征发光。
[Abstract]:In recent years , one - dimensional novel nanostructured materials have been widely used by researchers in the fields of electronics , optics , displays and advanced bioanalysis of nano - scale . Therefore , it is very important to find a simple method for preparing nano - fluorescent materials with perfect morphology . The method of sol - gel process and electrospinning technique is an effective method for preparing a quasi - one - dimensional nano - material .

A series of one - dimensional nano - luminescent materials , such as rare earth oxide nanofibers and vanadate nanofibers , were prepared by electrostatic spinning . The structure , morphology and composition of synthetic materials were characterized by X - ray diffraction ( XRD ) , scanning electron microscopy ( SEM ) , transmission electron microscopy ( TEM ) , infrared spectroscopy ( FT - IR ) and differential thermal - thermal analysis ( TG - DTA ) .

The fluorescent powder of Lu _ 2O _ 3 : Eu ~ ( 3 + ) nanofibers with one - dimensional structure was prepared by electrostatic spinning . The results of X - ray diffraction ( XRD ) , FT - IR and TG - DTA show that the samples prepared in Lu _ 2O _ 3 : Eu ~ ( 3 + ) have been crystallized at 900 鈩，

本文编号：1741465