本文選題：納米結(jié)構(gòu) + 靜電紡絲過程��； 參考：《東北師范大學(xué)》2011年碩士論文

【摘要】：近年來,一維新型納米結(jié)構(gòu)材料以其獨特的熒光特性在納米級別的電子學(xué)、光學(xué)、顯示器和先進生物分析上的廣泛應(yīng)用而受到研究者極大的重視。因此,尋找出制備完美形貌的納米熒光材料的簡單方法是非常重要的。而溶膠凝膠過程和電紡絲技術(shù)相結(jié)合的方法是制備一維和準一維納米材料的有效方法。本論文采取了這種新穎方法制備出了具有完美形貌的一維納米纖維。 本文利用靜電紡絲法制備出一系列的一維納米發(fā)光材料,例如:稀土氧化物納米纖維和釩酸鹽納米纖維。利用X-射線衍射(XRD)、掃描電鏡(SEM)、透射電鏡(TEM)、紅外光譜(FT-IR)、差熱-熱重分析(TG-DTA)等技術(shù)對合成材料的結(jié)構(gòu)、形貌、組成進行表征,用熒光光譜、低壓陰極射線光譜等手段來評價所制備的材料的發(fā)光性質(zhì)。同時就離子摻雜濃度對發(fā)光強度的影響做了進一步的討論。 采用靜電紡絲法制備了具有一維結(jié)構(gòu)的Lu_2O_3:Eu~(3+)納米纖維熒光粉。X-射線衍射(XRD)、紅外光譜(FT-IR)和差熱熱重(TG-DTA)研究結(jié)果表明,Lu_2O_3:Eu~(3+)樣品在900℃結(jié)晶,通過FESEM可以看出所制備的樣品都是均勻的纖維狀。TEM進一步表明了所制備的樣品是由許多納米粒子堆積而成的。在紫外光和低壓電子束的激發(fā)下,樣品發(fā)出強的紅光。 采用簡單、方便的靜電紡絲方法成功制備了一維GdVO4:Ln~(3+)(Ln=Eu,Dy,Sm)納米纖維。所得到的GdVO_4:Ln~(3+)(Ln=Eu,Dy,Sm)納米纖維在700℃結(jié)晶完好。從掃描電鏡結(jié)果可知,所制備的前驅(qū)纖維比較均勻且表面平滑,經(jīng)過700℃煅燒4個小時后,纖維直徑大幅減小并且仍然保持原來的纖維狀,但表面變得粗糙了。光致發(fā)光和陰極射線發(fā)光光譜表明,GdVO_4:Ln~(3+)納米纖維由于釩酸根向其摻雜離子的有效能量傳遞都表現(xiàn)出這些離子典型的特征發(fā)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，

本文編號：1741465