In this paper, a fast and facile microwave method is described to prepare monoclinic ScP04•2H2O flowerlike superstructures constructed by well-aligned nanorods without use of any template or surfactant. By varying the preparation parameters, such as reactant ratio, microwave power and reaction time, various morphologies, such as nanospheres, cubes and particles were obtained. The growth process of the flowerlike microstructure was also investigated. A nanorod growth and self-assembling process was involved in the formation of the flowerlike superstructure. After calcining the ScP04•2H2O microflowers at 800 oC, tetragonal ScP04 with similar morphology was obtained. Tb3+, Eu3+, Dy3+, Tb3+/Eu3+ and Eu3+/Dy3+ doped ScP04•2H2O were also prepared and their photoluminescent properties investigated. By adjusting the relative doping concentration, multicolor tunable emission of green, red and blue could be realized and the decay time results reveal that energy transfer occurs. More significantly, white light could be achieved in a 3% Eu3+ and 2% Dy3+ co-doped ScP04•2H2O. First-principles calculations were carried out to study the structural and electronic properties, which were in accordance with the experimental observations.

中文翻译：

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简便的微波合成ScPO4•2H2O花状超结构：形态控制，电子结构和多色可调发光特性

本文描述了一种快速简便的微波方法，该方法可制备由良好排列的纳米棒构建的单斜ScP04•2H2O花状超结构，而无需使用任何模板或表面活性剂。通过改变制备参数，例如反应物比例，微波功率和反应时间，获得了各种形态，例如纳米球，立方体和颗粒。还研究了花状微结构的生长过程。纳米棒的生长和自组装过程参与了花状超结构的形成。在800 oC下煅烧了ScP04•2H2O微型花后，获得了形态相似的四方ScP04。还制备了掺杂了Tb3 +，Eu3 +，Dy3 +，Tb3 + / Eu3 +和Eu3 + / Dy3 +的ScPO4•2H2O，并研究了它们的光致发光性能。通过调整相对掺杂浓度，可以实现绿色，红色和蓝色的多色可调发射，并且衰减时间结果表明发生了能量转移。更重要的是，可以在3％Eu3 +和2％Dy3 +共掺杂的ScP04•2H2O中获得白光。进行了第一性原理计算以研究结构和电子性质，这与实验观察结果一致。