Synthesis And Properties Of Rare Earth Ions-doped Lanthanum Oxyiodide Low-dimensional Nanomaterials

LaOI is an excellent luminescent host for rare earth cations (RE3+) owing to its low phonon energies. So far, LaOI powders which doped with RE3+have been synthesized by direct solid-state reaction at high temperature. One-dimensional nanomaterials have more novel properties than nanoparticles in some areas. Hence, it is an important and meaningful subject of study to fabricate rare earth cations-doped LaOI one-dimensional nanomaterials and to investigate their luminescence property.In this dissertation, LaOI:RE3+(RE=Tb, Er, Dy, Yb/Er, Yb/Ho) nanofibers, nanobelts and LaOI:Tb3+hollow nanofibers were fabricated via electrospinning technique combined with double-crucible iodination method. The samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy dispersion spectrometry and fluorescence spectroscopy (FS). The results show that the LaOI:RE3+nanomaterials are tetragonal phase in structure. The diameter of nanofibers is140-220nm, the width of nanobelts is05-5.5μm, and the thickness is100-350nm. LaOI:RE3+nanomaterials possess excellent luminescent performances. These new findings pave the way for further study of the luminescent properties of rare earth oxyiodide low-dimensional nanomaterials.