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| 1 | Synthesis, structural and spectroscopic studies on GdBO_3:Yb^(3+)/Tb^(3+)@SiO_2 core-shell nanostructures显示文摘The presented study concerned up-converting core/shell type nanomaterials based on lanthanide(Ⅲ) ions, Ln(Ⅲ), doped orthoborates. The system studied composed of the GdBO3 doped with Yb3+/Tb3+ luminescent core ensured an effective cooperative sensitization up-conversion, resulting in a bright green luminescence. The silica coating process was performed by a modified St?ber method, which resulted in the formation of core-shell nanostructures, making them suitable for bioapplications. The nanophosphors and nanocomposites were obtained by various methods, such as co-precipitation in the presence of Triton X-100 and micelle synthesis with ethylenediaminetetraacetic acid(EDTA) as organic modifiers/surfactants. The synthesized nanomaterials were characterized with the use of powder X-ray diffraction(XRD), infrared light absorption with Fourier transform FT-IR spectra, transmission electron microscopy(TEM), up-conversion emission spectra under IR light, as well as excitation spectra, emission spectra and fluorescence lifetimes under UV light, and their photophysical properties were compared. | Konrad Kubasiewicz Marcin Runowski Stefan Lis Agata Szczeszak | 2015 | Journal of Rare Earths2015，33，11： | 2 |
| 2 | NdFeO_3 as anode material for S/O_2 solid oxide fuel cells显示文摘Sulfur-oxygen solid oxide fuel cells (S/O2-SOFCs) can improve the utilization ratio of energy via converting the combustion heat of sulfur into electrical energy directly, and sulfur trioxide which is an intermediate in sulfuric acid industry can be obtained directly via S/O2-SOFCs. The anode material NdFeO3 was prepared via sol-gel method, the phase stability of NdFeO3 in sulfur vapor or sulfur dioxide atmosphere was investigated. The single cell, consisting of NdFeO3-SDC/SDC/LSM-SDC structure, was fabricated by the screen-printing method and tested by the home-built equipment with sulfur vapor or sulfur dioxide as the fuel. As indicated by X-ray diffraction (XRD) analysis, NdFeO3 was stable in sulfur vapor or sulfur dioxide atmosphere at 800℃, the phase composition of the mixture of NdFeO3 and SDC (Sm doped CeO2) did not change after the mixture was calcined at 800℃ for 4 h. The transmission electron microscope (TEM) photograph revealed that the average grain size of NdFeO3 powder was about 80 nm. With sulfur vapor or SO2 as the fuel, the maximum open circuit voltages (OCVs) of the single cell were 409 mV at 620℃ and 474 mV at 650℃, respectively; the maximum power densities of single cell were 0.154 mW/cm2 at 620℃ and 0.265 mW/cm2 at 650℃, respectively. | 陈同云 沈利铭 刘峰 朱伟长 张千峰 储向峰 | 2012 | Journal of Rare Earths2012，30，11： | 0 |
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