Synthesis of SrFe(Al)O3−δ–SrAl2O4 nanocomposites via green route
| Autor: | Yraida Díaz, Raquel del Toro, Brenda Gutiérrez, Edward E. Ávila, Edgar Cañizales, Ángela B. Sifontes, Susana Pinto-Castilla |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Strontium carbonate Nanoparticle 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound X-ray photoelectron spectroscopy law General Materials Science Calcination Ceramic Physical and Theoretical Chemistry High-resolution transmission electron microscopy Strontium oxide Nanocomposite 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Nano-Structures & Nano-Objects. 22:100437 |
| ISSN: | 2352-507X |
| Popis: | A ceramic nanocomposite of SrFe(Al)O 3 − δ and Sr3Al2O6 was obtained using the controlled combustion of a previously synthesized chitosan-Sr-Fe-Al precursor. The complex formed by chitosan and metal ions in the organometallic precursor was confirmed by FTIR, TGA and DSC analysis. The nanocomposite consisted of hard agglomerates containing nanoparticles of Sr-Fe-Al oxides with oval morphology and an average diameter ≤ 9 nm. The DRX analysis indicated a composition of SrFe(Al)O 3 − δ and Sr3Al2O6 phases. Also, HRTEM and XPS verified the formation of a principal phase of ceramic composite identified as SrFeO3–x(2.5 ≤ x ≤ 3.0) possibly of aluminum-substituted structure, and minority phases of SrAl12O19 and SrAl2O4. Furthermore, a by-product of strontium carbonate was found as traces on the composite oxide surface. It was attributed to solid-gas reactions of strontium oxide with carbon dioxide, the latter produced during the oxidative decomposition of the biotemplate. Also, moderated calcination temperature limits the total decomposition of SrCO3. |
| Databáze: | OpenAIRE |
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