Fabrication And Characterization Of One-Dimensional Rare Earth Compounds Nanofibers

Electrospinning technology is one kind of high efficient and low consumption preparation technique,which based on the principle of a high-speed jet can be developed from conductive fluid in high-voltage electrostatic field.The electricity spins the textile fiber diameter to be possible to achieve the submicron level or nanometer level,which has a broad application prospect in the compound materials,the medical rehabilitation,the medicine releases controls with domains and so on photoelectric apparatus.In this dissertation,Electrospinning technology was successfully adopted to fabricate the Sr₂CeO₄ nanofiber,Sr₂CeO₄:Eu³⁺ nanofiber,Sr₂CeO₄:Ho³⁺ nanofiber,Sr₂CeO₄:Er³⁺ nanofiber, La₂O₃ nanofiber and La₂O₃:Eu³⁺ nanofiber.Modern means of analysis,such as XRD, SEM,TG-DTA,FTIR and fluorescence spectroscopy was carried on the preparation samples.The results showes that:(1) After high-temperature roasting,the moisture and organic matter in the complex fiber decompose gradually.The single-phase nanofiber,which are crystalline state,was obtained finally,and the textile fiber diameter is minished,the minimal only has several dozens nanometers;(2) Fluorescence analysis shows that the luminous intensity of the fluorescent materials,fabricated via electrospinning,has a close relationship with the crystallization. Along with the sintering temperature increase,the crystallinity of nanofiber is getting higher and higher,its fluorescence performance is also getting stronger and stronger,but the peak position and the peak shape actually not to have visible change.