School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou, China.
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China.
Luminescence. 2021 Jun;36(4):928-936. doi: 10.1002/bio.4018. Epub 2021 Feb 7.
By designing an orthogonal experiment with four factors and three levels, (Na Bi Nd )TiO (NBT-Nd) nanopowders were prepared using a hydrothermal method under different conditions to determine the optimum hydrothermal synthesis conditions. The synthesized NBT-Nd nanopowders were characterized using X-ray diffraction measurement, ultraviolet-visible spectra, photoluminescence spectra, and transmission electron microscopy to evaluate the orthogonal experimental conditions. The results showed that NBT-Nd powders with excellent crystalline and luminescence properties could be obtained at 160°C, with a 16 h reaction time, 8 mol·L NaOH, and with 0.4489 g C H BrN. The optimized hydrothermal method-prepared NBT-Nd powder has a rather pure rhombohedral perovskite structure at room temperature, and exhibits an aggregated polycrystalline structure containing nanotubes and nano-sized particles. Under excitation of 247 nm light, strong fluorescence emissions are excited at 423 nm and 441 nm in the NBT-Nd powder that were generated by transitions of Nd from D to I and from G to I , respectively. Through CIE1931 chromaticity calculation of the emission peaks, the NBT-Nd powder was shown to emit indigo blue fluorescent light.
通过四因素三水平的正交实验设计，采用水热法在不同条件下制备（NaBiNd）TiO（NBT-Nd）纳米粉体，确定最佳水热合成条件。采用X 射线衍射测量、紫外-可见光谱、光致发光光谱和透射电子显微镜对合成的 NBT-Nd 纳米粉体进行了表征，以评估正交实验条件。结果表明，在 160°C、反应时间 16 h、8 mol·L NaOH 和 0.4489 g C H BrN 条件下，可获得结晶性和发光性能优异的 NBT-Nd 粉末。优化后的水热法制备的 NBT-Nd 粉末在室温下具有相当纯的三方钙钛矿结构，呈现出包含纳米管和纳米颗粒的聚集多晶结构。在 247nm 光激发下，NBT-Nd 粉末在 423nm 和 441nm 处分别产生由 Nd 从 D 到 I 和从 G 到 I 的跃迁引起的强烈荧光发射。通过发射峰的 CIE1931 色度计算，NBT-Nd 粉末发射出深蓝色荧光。
