Preparation of SrTiO 3 nanocubes by CO 2 laser vaporization (LAVA) and hydrothermal maturation.

Autor: Müller L; Otto-Schott-Institute of Materials Research (OSIM), Friedrich-Schiller-University of Jena Löbdergraben 32 07743 Jena Germany frank.mueller@uni-jena.de., Hornig P; Otto-Schott-Institute of Materials Research (OSIM), Friedrich-Schiller-University of Jena Löbdergraben 32 07743 Jena Germany frank.mueller@uni-jena.de., Grabow J; Otto-Schott-Institute of Materials Research (OSIM), Friedrich-Schiller-University of Jena Löbdergraben 32 07743 Jena Germany frank.mueller@uni-jena.de., Müller FA; Otto-Schott-Institute of Materials Research (OSIM), Friedrich-Schiller-University of Jena Löbdergraben 32 07743 Jena Germany frank.mueller@uni-jena.de.
Jazyk: angličtina
Zdroj: Nanoscale advances [Nanoscale Adv] 2021 Nov 08; Vol. 4 (1), pp. 182-189. Date of Electronic Publication: 2021 Nov 08 (Print Publication: 2021).
DOI: 10.1039/d1na00685a
Abstrakt: SrTiO 3 is of particular interest for numerous applications such as photocatalytic water splitting, as an electrode material for thermoelectrics or as piezoceramics for sensors. Here we report on an advanced CO 2 laser vaporization (LAVA) method for the production of faceted, single-phase SrTiO 3 nanoparticles with an average particle size of 35 nm. Starting from a coarse SrTiO 3 raw powder, spherical SrTiO 3 nanoparticles were obtained by a laser-induced gas-phase condensation process. The composition of the nanoparticles corresponds to that of the starting powder, as XRD and FT-IR measurements show. Further hydrothermal treatment at 275 °C for 4 hours leads to the formation of faceted nanocubes with increasing crystallite size, as demonstrated by TEM, HR-TEM and XRD measurements. During a final washing step in 0.1 M HCl, SrCO 3 impurities were dissolved and thus single-phase SrTiO 3 nanocubes were successfully obtained, as shown by FT-IR, XRD and TEM analyses. The presented process facilitates the production of single-phase, highly crystalline SrTiO 3 nanopowders in sufficient quantities for subsequent use in a variety of applications, in particular for hydrogen production by photocatalytic water splitting.
Competing Interests: The authors declare no competing financial interest.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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