电纺制备Tb^(3+)离子掺杂LaPO_4微米纤维材料及发光性能

Preparation and Luminescent Properties of Tb^(3+) Doped LaPO_4 Microfibers by Electrospinning

采用溶胶-凝胶过程与静电纺丝技术相结合,以氧化镧、氧化铽、磷酸二氢铵和聚丙烯腈(PAN)为主要原料,制备了稀土Tb3+离子掺杂的LaPO4(LaPO4:Tb)微米纤维。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(TG-DTA)和X射线光电能谱(XPS)等分析测试手段对所得样品的结构和形貌进行表征,并用荧光光谱仪进行了光谱性质分析。结果表明:产物为单斜结构LaPO4,具有较为规则的纤维形貌,单根纤维直径约为150 nm。XRD图谱显示Tb3+取代La3+进入LaPO4晶格,但在LaPO4:Tb微米纤维的荧光光谱上没有出现PO3-4发射峰,这表明LaPO4是良好的发光基质材料,所制备的LaPO4:Tb微米纤维荧光强度大且稳定。

Tb^3＋ -doped LaPO4 microfibers were synthesized via electrospinning, using La2O3, Tb2O3, NH4H2POa and PAN as starting materials. The strutture and morph characterized by and XPS, whil ology of the resulting products were XRD, SEM, TEM, FF-IR, TG-DTA e the luminescent properties of the products were investigated by fluorescence spectrometer. The results indicated that the as-prepared products were crystallized in pure body centered tetragonal LaPO4 phase with uniform fibers morphologies and the sizes of the samples were estimated to be around 150 nm. XRD patterns of the as-fabricated Tb^3＋ -doped LaPO4 microfibers showed that Tb^3＋ was doped at Tb^3＋ sites in LaPO4 crystal. There was no emission peak of PO4^3- from fluorescence spectrum of LaPO4： Tb microfibers, which indicates that LaPO4 is a very attractive luminescent host. The electrospinning is convenient and easy, and the as-prepared LaPOn：Tb microfibers show strong and stable fluorescent intensity