Synthesis Of Rare Earth Aluminate Low-dimensional Nanomaterials Via Electrospinning

Rare earth phosphors using aluminates as matrix have important applications. Nowadays, research on rare earth aluminate luminescent nanomaterials is focused on the morphology of nanoparticles. Investigation on one-dimensional rare earth aluminate nanomaterials is rarely reported. Therefore, fabrication of rare earth ions-doped rare earth aluminate nanofibers and nanobelts will be a meaningful subject of significance. Electrospinning has attracted much attention of researchers and has been proved to be one of the best methods to fabricate low-dimensional nanomaterials owing to its simple operation, high efficiency and reproducibility, et al.In this dissertation, sol-gel process was applied to fabricate the precursor sol of certain viscosity using PVP and various rare earth nitrate salts as starting materials, and electrospinning technique was used to prepare PVP/nitrates composite nanofibers and nanobelts. LnAlO3:RE3+(Ln=La, Y; RE=Eu, Tb. Ce/Tb), Y4Al2O9:Eu3+nanofibers, nanobelts and LaAlO3:Eu3+hollow nanofibers were fabricated by calcination of the electrospun PVP/[rare earth nitrate] composite nanofibers and nanobelts.The samples were characterized by x-ray diffractometry(XRD), Fourier transform infrared spectrometry(FTIR), field emission scanning electron microscope(FESEM), transmission electron microscope(TEM) and fluorescence spectroscopy. The results showed that the diameter of nanofibers was ca.50-210nm; the outer and inner diameters of LaAlO3:Eu3+hollow nanofibers were160nm and100nm, respectively; the width of nanobelts was0.4-7.5μm, and the thickness was ca.70-100nm. Some meaningful results were obtained, and laid solid foundations for the future study of luminescence or up-conversion luminescence of rare earth ions-doped rare earth aluminate low-dimensional nanomaterials.