Fabrication and luminescent properties of Y_2O_3:Eu~(3+) nanofibers and nanobelts

Two different kinds of one-dimentional nanoscale Y2O3:Eu3 +were prepared via electrospinning followed by calcinations.Water and N,N-dimethylformamide(DMF) were respectively selected to dissolve poly(vinyl pyrrolidone) and rare earth nitrates.The structure and morphology of the obtained samples were characterized by thermogravimetric analysis,field emission scanning electron microscopy,fourier transform infrared spectroscopy,and X-ray diffraction.The photoluminescence(PL)spectroscopy was employed to study their luminescent properties.The results indicated that Y2O3:Eu3 +nanobelts were obtained with deionized H2 O as the solvent,and a possible formation mechanism for the nanofibers was proposed.When DMF was used as solvent,the obtained Y2O3:Eu3 +before and after calcination was nanofiber-like.After 800 ℃ calcinations,both samples were well crystallized and had cubic Y2O3 phase.Furthermore,the PL emission intensity of Y2O3:Eu3 +nanofibers were about twice higher than those of nanobelts.