静电纺丝技术制备Gd_2O_3:Eu^(3+)发光纳米纤维与表征  

Fabrication and Characterization of Gd_2O_3:Eu^(3+) Luminescent Nanofibres via Electrospinning

作　　者：王进贤[1] 车红锐[1] 董相廷[1] 刘莉[1] 刘桂霞[1] 

机构地区：[1]长春理工大学化学与环境工程学院,吉林长春130022

出　　处：《光学学报》2010年第2期473-479,共7页Acta Optica Sinica

基　　金：教育部科学技术研究重点项目(207026);吉林省科技发展计划重大项目(20070402;20060504);吉林省教育厅"十一五"科学技术研究项目(2007-45;2006JYT05);吉林省环保局科技项目(2006-24);长春市科技计划项目(2007045)资助课题

摘　　要：采用静电纺丝技术制备了PVA/[Gd(NO3)3+Eu(NO3)3]复合纳米纤维,并将其进行热处理,得到Gd2O3:Eu3+发光纳米纤维。X射线衍射分析表明,复合纤维为无定型,Gd2O3:Eu3+发光纳米纤维属于体心立方晶系,空间群为Ia 3。扫描电子显微镜(SEM)分析表明,复合纳米纤维的平均直径约为200 nm,经过800℃焙烧后,获得了直径约50 nm的Gd2O3:Eu3+发光纳米纤维。差热-热重分析表明,温度高于600℃时,复合纳米纤维中水份、有机物和硝酸盐分解挥发完毕,样品不再失重,总失重率为71.9%。傅里叶转换红外光谱(FTIR)分析表明,复合纳米纤维的红外光谱与纯聚乙烯醇的红外光谱基本一致,600℃以上生成了Gd2O3:Eu3+发光纳米纤维。荧光光谱分析表明,在251 nm紫外光激发下,Gd2O3:Eu3+发光纳米纤维发射出Eu3+离子特征的609 nm明亮红光。讨论了Gd2O3:Eu3+发光纳米纤维的形成机理,该技术可以推广用于制备其他稀土氧化物发光纳米纤维。PVA/[Gd（NO3）3＋Eu（NO3）3] composite nanofibres were prepared via electrospinning technique. Gd2O3：Eu 3＋ luminescent nanofibers were synthesized by calcination of the as-prepared composite nanofibres. XRD patterns showed that the composite nanofibres were amorphous in structure,and Gd2O3：Eu^3＋ luminescent nanofibers were cubic in structure with space group Ia3. SEM analysis indicated that the average diameter of the composite nanofibres was about 200 nm. Gd2O3：Eu^3＋ luminescent nanofibers of about 50 nm in diameter were acquired when calcination temperature was 800 ℃. TG-DTA analysis revealed that the water,organic compounds and nitrate salts in the composite nanofibres were decomposed and volatilized totally,and the weight of the sample kept constant when temperature was above 600 ℃. The overall weight loss rate was 71.9%. FTIR analysis manifested that the spectrum of the composite nanofibres was almost the same as that of pure PVA,and Gd2O3：Eu^3＋ luminescent nanofibers were formed above 600 ℃. Fluorescence spectral analysis indicated that Gd2O3：Eu^3＋ luminescent nanofibers emitted bright red light of 609 nm in wavelength of Eu^3＋ ion characteristic emission under the excitation of 251 nm in wavelength of ultraviolet ray. Formation mechanism of Gd2O3：Eu^3＋ luminescent nanofibers was discussed. The technique can be applied to fabrication of other rare-earths composite oxides luminescent nanofibers.

关 键 词：光学材料 纳米纤维 静电纺丝 发光 GD2O3 Gd2O3:Eu^3+ 

分 类 号：O643[理学—物理化学]