Unveiling the efficiency of microwave-assisted hydrothermal treatment for the preparation of SrTiO3 mesocrystals

Author(s):Show less -

da Silva, Luis F. ^[1] ; Catto, Anadne C. ^[1] ; Avansi Jr, Waldir ; Mesquita, Alexandre ^[2] ; Maia, Lauro J. Q. ^[3] ; Lopes, Osmando F. ^[4] ; Li, Maximo Siu ^[5] ; Moreira, Mario L. ^[6] ; Longo, Elson ^[7] ; Andres, Juan ^[8] ; Mastelaro, Valmor R. ^[5]

Affiliation

^[1] Univ Fed Sao Carlos, Lab Nanostruct Multifunct Mat, Rodovia Washington Luiz, Km 235, BR-235 Sao Carlos, SP - Brazil

^[2] Sao Paulo State Univ, Inst Geosci & Exact Sci, UNESP, BR-13506900 Rio Claro, SP - Brazil

^[3] Univ Fed Goias, Inst Phys, Alameda Palmeiras S-N, BR-74690900 Goiania, Go - Brazil

^[4] Univ Fed Uberlandia, Inst Chem, BR-38400902 Uberlandia, MG - Brazil

^[5] Univ Sao Paulo, Inst Phys Sao Carlos, Ave Trabalhador Sao Carlos, BR-1356600 Sao Carlos, SP - Brazil

^[6] Univ Fed Pelotas, Phys & Math Inst IFM, INCTMN, Campus Univ Capao do Leao, BR-96010900 Pelotas, RS - Brazil

^[7] Univ Fed Sao Carlos, Ctr Dev Funct Mat, Rodovia Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[8] Univ Jaume 1, Dept Quim Fis & Analit, E-12080 Castellon de La Plana - Spain

• Document type: Journal article
• Source: Physical Chemistry Chemical Physics; v. 21, n. 39, p. 22031-22038, OCT 21 2019.
• Web of Science Citations: 0

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. (AU)

• FAPESP's process: 17/12437-5 - Preparation and characterization of semiconductor nanoheterojunctions applied in photoactived gas sensors
• Grantee: Luís Fernando da Silva
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC