YAlO_3∶Eu^(3+)发光纳米纤维的制备与表征  

Preparation and Characterization of YAlO_3:Eu^(3+) Luminescence Nanofibers

作　　者：秦菲[1] 王进贤[1] 董相廷[1] 于文生[1] 刘桂霞[1] 

机构地区：[1]长春理工大学应用化学与纳米技术吉林省高校重点实验室,吉林长春130022

出　　处：《中国激光》2012年第6期143-149,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(50972020;51072026);教育部博士点基金(20102216110002;20112216120003);教育部科学技术研究重点项目(207026)资助课题;吉林省科技发展计划重大项目(20070402;20060504)

摘　　要：采用静电纺丝技术制备了聚乙烯吡咯烷酮PVP/[Y(NO3)3+Al(NO3)3+Eu(NO3)3]复合纤维,将其进行热处理,得到了YAlO3:Eu3+发光纳米纤维。采用X射线衍射(XRD)、扫描电镜(SEM)、荧光光谱等技术对样品进行了表征。PVP/[Y(NO3)3+Al(NO3)3+Eu(NO3)3]复合纤维经1200℃焙烧2h后,获得了YAlO3:Eu3+纳米纤维,属于正交晶系,空间群为Pnma。用Shapiro-Wilk方法检验了纤维直径分布情况,在95%的置信度下,纤维直径属于正态分布。PVP/[Y(NO3)3+Al(NO3)3+Eu(NO3)3]复合纤维表面光滑,纤维分散性较好,有很好的长径比,尺寸均一,平均直径为(152.9±26.0)nm;YAlO3:Eu3+纳米纤维的平均直径为(106.7±20.2)nm。在234nm的紫外光激发下,YAlO3:Eu3+纳米纤维的主要发射峰位于590nm和609nm处,分别属于Eu3+的5 D0→7F1跃迁和5 D0→7F2跃迁,Eu3+掺杂离子浓度对YAlO3:Eu3+发射峰的峰型与位置均没有影响,当Eu3+掺杂离子浓度为5%时,YAlO3:Eu3+纳米纤维发光最强。PVP/[Y（NO3）3＋Al（NO3）3＋Eu（NO3）3] composite nanofibers are prepared via electrospinning,and YAlO3：Eu3＋ nanofibers are fabricated by calcination of the prepared composite fibers.The samples are characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and fluorescence spectroscopy.Pure phase YAlO3：Eu3＋ nanofibers are obtained by calcination of the relevant composite fibers at 1200 ℃ for 2 h and YAlO3：Eu3＋ nanofibers belong to orthorhombic system with space group Pnma.The diameters of fibers analyzed by Shapiro-Wilk method obey normal distribution under the confidence of level 95%.The surfaces of as-prepared composite fibers are smooth with a good aspect ratio,dispersion and uniform size.The diameters of PVP/[Y（NO3）3＋Al（NO3）3＋Eu（NO3）3] fibers and YAlO3：Eu3＋ nanofibers are（152.9±26.0）nm and（106.7±20.2）nm,respectively.Fluorescence spectra analysis manifests that YAlO3：Eu3＋ nanofibers emit the predominant emission peaks at 590 nm and 609 nm under the excitation of 234 nm ultraviolet ray,attributed to the transitions of 5D0→7F1 and 5D0→7F2 energy levels of Eu3＋,respectively.The doping concentrations of Eu3＋ have no effect on the shape and wavelength of the emission spectra of YAlO3：Eu3＋,and the luminescent intensity reaches a maximum at about 5% of Eu3＋.

关 键 词：材料 纳米纤维 铝酸钇 静电纺丝 

分 类 号：O436[机械工程—光学工程]