Laboratory of Nanostructured Multifunctional Materials, Federal University of São Carlos, Rodovia Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil.
Phys Chem Chem Phys. 2019 Oct 9;21(39):22031-22038. doi: 10.1039/c9cp02893e.
Material processing has become essential for the proper control, tuning and consequent application of the properties of micro/nanoparticles. In this case, we report herein the capability of the microwave-assisted hydrothermal (MAH) method to prepare the SrTiO3 compound, as a case study of inorganic compounds. Analyses conducted by X-ray diffraction, X-ray photoelectron and X-ray absorption spectroscopies confirmed that the MAH route enables the formation of pristine SrTiO3. The results indicated that the combination of thermal and non-thermal effects during the MAH treatment provides ideal conditions for an efficient and rapid synthesis of pristine SrTiO3 mesocrystals. Scanning electron microscopy images revealed a cube-like morphology (of ca. 1 μm) formed via a self-assembly process, influenced by the MAH time. Additionally, photoluminescence measurements revealed a broad blue emission related to intrinsic defects, which decreased with the MAH synthesis time.
材料处理已成为控制、调整和应用微/纳米颗粒性能的必要手段。在这种情况下，我们报告了微波辅助水热（MAH）法制备 SrTiO3 化合物的能力，作为无机化合物的案例研究。X 射线衍射、X 射线光电子能谱和 X 射线吸收光谱分析证实，MAH 路线能够形成原始的 SrTiO3。结果表明，MAH 处理过程中的热和非热效应的结合为高效快速合成原始 SrTiO3 介晶提供了理想的条件。扫描电子显微镜图像显示，通过自组装过程形成了一种立方体形貌（约 1 μm），这受到 MAH 时间的影响。此外，光致发光测量显示，与本征缺陷有关的宽蓝光发射随 MAH 合成时间的增加而减少。
