One-dimensional Y <sub> 2 </ Sub> O <sub> 3 </ Sub>: Materials Synthesis And Luminescent Properties Of Eu Nano

One-dimensional structures such as nanotubes and nanowires have attracted much attention due to their scientific significance and potential technological applications. Developing new preparation methods and new material systems of one-dimensional nanomaterials are very important topics in current research activities in the fields of physics, chemistry and materials science, which are also the main aims of this thesis.In this paper, Y₄O(OH)₉(NO₃) nanorod bundles were prepared by hydrothermal and solvothermal method and the luminescent properties of Y₂O₃∶Eu nanorod bundles were investigated.The products were characterized by DTA-TG, XRD, SEM, EDS, TEM, FT-IR and PL spectra. The main contents are summarized as following.Firstly, Y₄O(OH)₉(NO₃) nanorod bundles were prepared by hydrothermal and solvothermal method, respectively. The result showed that the template and solvent did not play key role in the formation of the nanorod bundles. However, the pH value of the starting solution and the crystal structure of the products were the key factors. The products were mainly composed of lamina microprisms on micrometer scale when the pH value was fixed at 7, as the pH value increased from 8 to 12.5, the obtained products were circular nanorods, and the cross-sectional was still trilobal. On the other hand, the diameters of the products decreased from micrometer under pH value of 7 to nanometer scale under pH value above 8. The reaction temperature and time were also important to obtain target nanometer products. A primary mechanism was proposed to explain present results.Secondly, Y₄O(OH)₉(NO)₃)∶Eu nanorod bundles were prepared by hydrothermal method and Y₂O₃∶Eu nanorod bundles were prepared by heat treatment processing.The results showed that the luminescent intensity of Y₄O(OH)₉(NO₃)∶Eu product prepared under different pH values conditions were different. For Y₂O₃∶Eu nanoscale phosphor prepared from Y₄O(OH)₉(NO₃)∶Eu nanorod bundles after heat treatment, the single Y₂O₃∶Eu phase was formed after heat treatment at 500 ℃ for 2 hours.Even under high temperature heat treatment for 2 hours, Y₂O₃∶Eu nanopowder with good dispersion and almost free of aggregation was obtained. The luminescent intensity of the obtained Y₂O₃∶Eu nanopowder increased with the increased heat treatment temperature.