YF3:Eu3+纳米纤维/高分子复合纳米纤维的制备与表征

采用静电纺丝技术制备了Y2O3:Eu3+纳米纤维,使用NH4F2为氟化刺,经双坩埚法氟化和脱氨后得到YF3:Eu3+纳米纤维,再采用静电纺丝技术制备了YF3:Eu3+纳米纤维/PVP复合纳米纤维.XRD分析表明,立方相的Y2O3:Eu3+氟化后,得到了正交相的YE3:Eu3+纳米纤维,空间群为Prima,YF3:Eu3...

Preparation and Characterization of YF3: Eu3+ Nanofibers/Polymer Composite Nanofibers

Y2O3:Eu3+ nanofibers were prepared by electrospinning, and then YF3:Eu3+ nanofibers were obtained by fluorination of the relevant Y2O3:Eu3+ nanofibers followed by deammoniation process via double-crucible method using NH4HF2 as fluorinating agent. YF3:Eu3+ nanofibers/PVP composite nanofibers were fabricated using electrospinning technique again. XRD analysis indicated that orthorhombic YF3:Eu3+ nanofibers with space group Pnma were acquired through fluorination of the cubic Y2O3:Eu3+ nanofibers. YF3:Eu3+ nanofibers/PVP composite nanofibers possess obvious diffraction peaks of YF3:Eu3+. SEM revealed that diameters of YF3:Eu3+ nanofibers and YF3:Eu3+ nanofibers/ PVP composite nanofibers are 91±11 nm and 319±43 nm, respectively, and the surface of these fibers are smooth. The diameters of fibers analyzed by Shapiro-Wilk method are normal distribution. Fluorescence spectra analysis manifested that YF3:Eu3+ nanofibers and YF3:Eu3+ nanofibers/ PVP composite nanofibers emit the strongest emission peaks at 588 nm and 595 nm originating from the transition 5D0→7F1 of Eu3+, which suggests Eu3+ ion in YF3 crystal is at a site of C2 symmetry. PVP has no effects on the wavelength of the emission peaks of YF3:Eu3+, but the luminescent intensity is decreased. Relationship between YF3:Eu3+ contents and luminescence intensity for YF3:Eu3+ nanofibers/PVP composite nanofibers presents linearity.