Abstract In this work we report our recent efforts on the investigation of the compositional and structural features of series of nanocrystalline Li4Ti5O12 (LTO) doped with Eu3+ ions powders, which were synthesized in a high-energy ball-milling (HEBM) process. Lithium carbonate, titanium and europium oxides were used as starting reagents. The ball-milled materials were turned into nanocrystalline powders due to the heating that was carried out in the air in the temperature range from 500 to 800 °C. The synthesized LTO doped with Eu3+ powders were examined by a number of physicochemical techniques: X-ray powder diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), absorption and emission spectroscopy (photoluminescence and excitation spectra were recorded), diffuse reflection spectroscopy (UV-vis DRS), scanning electron (SEM), transmission (TEM) and atomic force (AFM) microscopy. Structural, morphological and photoluminescent properties were correlated and examined for the first time in this work. The obtained results suggest that LTO material doped with rare earth ions like europium could serve as a material for applications in optoelectronic devices such as white light emitting diodes (WLEDs).

中文翻译：

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Eu3+离子掺杂对作为高效光致发光材料的尖晶石结构锂钛氧化物（Li4Ti5O12）理化性质的影响

摘要 在这项工作中，我们报告了我们最近在研究一系列掺有 Eu3+ 离子粉末的纳米晶 Li4Ti5O12 (LTO) 的组成和结构特征方面所做的努力，这些粉末是在高能球磨 (HEBM) 工艺中合成的。碳酸锂、钛和铕的氧化物用作起始试剂。由于在空气中在 500 至 800 °C 的温度范围内进行加热，球磨后的材料变成了纳米晶粉末。通过多种物理化学技术检测了掺杂 Eu3+ 粉末的合成 LTO：X 射线粉末衍射 (XRD)、拉曼光谱、X 射线光电子能谱 (XPS)、傅里叶变换红外光谱 (FTIR)、吸收和发射光谱（记录了光致发光和激发光谱），漫反射光谱 (UV-vis DRS)、扫描电子 (SEM)、透射 (TEM) 和原子力 (AFM) 显微镜。在这项工作中，结构、形态和光致发光特性首次被关联和检查。获得的结果表明，掺杂铕等稀土离子的 LTO 材料可用作白光发光二极管 (WLED) 等光电器件中的应用材料。