Unveiling the efficiency of microwave-assisted hydrothermal treatment for the preparation of SrTiO3 mesocrystals
Abstract: 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 mu m) 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.
Author(s): da Silva, LF; Catto, AC; Avansi, W; Mesquita, A; Maia, LJQ; Lopes, OF; Li, MS; Moreira, ML; Longo, E; Andres, J; Mastelaro, VR
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume: 21 Pages: 22031-22038 Published: OCT 21 2019
DOI: 10.1039/c9cp02893e
