Fabrication of One-dimensional LaPO_4:Eu~(3+) Micro-nanofibers by Electrospinning

Eu3+-doped LaPO4 micro-nanofibers were prepared by the electrospinning technology.Scanning electron microscope(SEM),X-ray diffraction(XRD),themogravimetry-differential thermal analysis(TG-DTA),and photoluminescence spectra(PL) were used to characterize the obtained samples.XRD patterns indicate that the as-prepared micro-nanofibers are crystallized well at 800℃ and assigned to JCPDS-35-0731 of the monoclinic LaPO4 crystal.Upon excitation into the Eu3+ at 409 nm,the emission spectrum of LaPO4: Eu3+ micro-nanofibers is composed of 5D0 7FJ(J = 1,2,3,4) emission lines of Eu3+,with the transition 5D0 7F2(at 618 nm) being the most prominent group,which is characterized by red emission.The optimum doping concentration of Eu3+ is 5mol% in the LaPO4: Eu3+ micro-nanofibers.The luminescence decay curve of LaPO4: Eu3+ micro-nanofibers shows single exponential behavior,and the lifetime(τ) of Eu3+ is about 3.7 ms.