Abstract:

PVP/[Sr(NO3)2+Al(NO3)3+Eu(NO3)3+Dy(NO3)3] composite nanofibers were prepared by sol-gel and electrospinning technique. The influence of nitrate content on the performance and spinnability of spinning solution was discussed. SrAl2O4:Eu2+,Dy3+ luminescent nanometer short fibers were synthesized by calcination under a reducing atmosphere at 1100℃. The luminescent nanofiber samples were characterized by XRD, SEM, FTIR, fluorescence spectrophotometer, respectively. The experimental results showed that the samples possess SrAl2O4 pure phase and monoclinic crystal structure, the diameter of nanofibers is about 200nm and the size is uniformly distributed. The excitation spectrum of samples takes on a continuous broad band nearly from 250 to 450 nm. The samples emit green fluorescence of 510nm in wavelength of Eu2+ ion characteristic emission under the excitation of 365nm in wavelength of ultraviolet ray. The position of emission peak exhibit blue shift in some degree compared with that of bulk SrAl2O4:Eu2+, Dy3+. The initial luminescent intensity is 1.72 cd/m2.