Fabrication And Characterization Of Rare Earth Ions-doped GGG Low-dimensional Nanomaterials Via Electrospinning

Low-dimensional nanomaterials are the basic composition unit of devices and materials, which will play an important role in building integrated circuits and functional devices. The preparation and processing of low-dimensional nanomaterials have become key components in the field of nanotechnology. In recent years, electrospinning technology has been proved to be one of the effective methods to prepare inorganic oxides low-dimensional nanomaterials owing to its high efficiency, simple operation and so on. Gadolinium Gallium Garnet (GGG) is an important matrix for laser due to its excellent properties. Recently, Low-dimensional GGG luminescent nanomaterials have also aroused a lot of concern from scientists. Therefore, fabrication of rare earth ions-doped GGG low-dimensional luminescent nanomaterials via electrospinning will be a meaningful subject of significance.In this dissertation, sol-gel process was applied to prepare the precursor sol of certain viscosity using PVP and various nitrate salts as starting materials, and electrospinning technique was used to fabricate PVP/nitrate composite nanofibers and composite nanobelts. GGG, GGG:Eu3+, GGG:Tb3+, GGG:Nd3+, GGG:Er3+, GGG:Yb3+/Er3+ nanofibers and porous nanobelts were fabricated by calcination of the as-prepared composite nanofibers and composite nanobelts. The samples were characterized by thermogravimetric-differential thermal analysis(TG-DTA), 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 diameters of as-prepared rare earth ions-doped GGG nanofibers were in narrow range, and there is no cross-linking among nanofibers, and the diameter was about 60-100 nm, and the length was greater than 100μm. The structure of as-prepared rare earth ions-doped GGG nanobelts with large width-to-thickness ratios were porous, the width of nanobelts were 1-5μm, and the thickness were ca.30-80 nm, and the length was greater than 500μm. Some meaningful results were obtained, and laid solid foundations for the future study of luminescence or up-conversion luminescence of rare earth ions-doped GGG low-dimensional nanomaterials.