In this paper, submicro-scaled YF3 particles with uniform rice-like morphologies were facilely synthesized by reacting yttrium nitrate with tetrabutylammonium fluoride via a solid-state reaction process at 50 °C for 12 h.The phase confirmation and morphology of the as-prepared YF3 particles were investigated by X-ray powder diffraction(XRD) and scanning electron microscopy(SEM).SEM results reveal that the YF3 submicroparticles are about 700 nm in length and 260 nm in width. Eu3+and Tb3+doped YF3 submicroparticles were also prepared with similar process and their photoluminescence properties were studied. Results demonstrate that the doping of Eu3+and Tb3+has slight effect on the morphologies of the product. Owing to the small average crystallite size or the low crystallinity of the product, the photoluminescence intensity of the Eu3+and Tb3+doped YF3 submicroparticles is very weak. Some characteristic peaks even cannot be observed in the emission spectrum.
In this work,a facile route using a simple solvothermal reaction and sequential heat treatment process to prepare porous Y2O3 microcubes is presented.The as-synthesized products were characterized by X-ray powder diffraction(XRD) ,scanning electronic microscope(SEM) ,en-ergy dispersive spectrometer(EDS) ,thermogravimetric analysis(TG) ,and differential thermal analysis(DTA) .The thermal decomposition process of the Y2O3 precursor was investigated.SEM results demonstrated that the as-prepared porous Y2O3 microcubes were with an aver-age width of about 20 μm and thickness of about 8 μm.It was found that the morphology of the Y2O3 precursor could be readily tuned by varying the molar ratio of S 2 O 82-to Y3+.Y2O3:Eu3+(6.6%) microcubes were also prepared and their photoluminescence properties were investigated.
Uniform YF3 nanorods composed of nanoparticles were successfully prepared via a facile solvothermal method with ethanol as solvent and tetrabutyl ammonium fluoride(TBAF) as fluorine source.The products were characterized with powder X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The nanorods were with diameters of ca.60 nm and lengths ranging from 200 to 350 nm.Eu3+ and Tb3+ doped YF3 nanorods were also prepared and their photoluminescence properties were investigated.Cytotoxicity study revealed that these YF3 based nanorods were biocompatible.
