Unveiling the efficiency of microwave-assisted hydrothermal treatment for the preparation of SrTiO3 mesocrystals
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2019-01-01
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Da Silva, Luís F.
Catto, Ariadne C.
Avansi, Waldir
Mesquita, Alexandre [UNESP]
Maia, Lauro J. Q.
Lopes, Osmando F.
Li, Máximo Siu
Moreira, Mário L.
Longo, Elson
Andrés, Juan
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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.
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Physical Chemistry Chemical Physics, v. 21, n. 39, p. 22031-22038, 2019.