Distinct Phase Formation of BiREWO6 (RE = La–Yb) Nanoparticles by a One Step Hydrothermal Synthesis and Their Photocatalytic Applications
| Autor: | Pradeep P. Shanbogh, Nalini G. Sundaram, Ashok Rao, Diptikanta Swain, Chandrabhas Narayana |
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| Rok vydání: | 2018 |
| Předmět: |
Ionic radius
biology Rietveld refinement 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification 01 natural sciences Hydrothermal circulation 0104 chemical sciences Aurivillius Crystallography Phase (matter) Hydrothermal synthesis General Materials Science Orthorhombic crystal system 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Crystal Growth & Design. 18:1935-1939 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.7b01774 |
| Popis: | Under identical hydrothermal condition, remarkably, Aurivillius BiREWO6 nanoparticles crystallize in an orthorhombic phase for RE = Ce and La, while the RE = Nd–Yb materials crystallize in the monoclinic phase. This kind of distinct phase formation in this series is not observed in solid state synthesis, where for all RE substitution, only the monoclinic phase is formed. Moreover, formation of the orthorhombic phase for BiLaWO6 and BiCeWO6 has been observed for the first time. Calcination of as-synthesized BiLaWO6 and BiCeWO6 nanomaterials results in the monoclinic phase and this indicates that the formation of the orthorhombic phase is favored only under mild reaction conditions. This could be attributed to the crucial role of the ionic radii of RE3+ and Bi3+ ions in solution. Rietveld refinement confirms the BiCeWO6 and BiGdWO6 are isostrutural to the low temperature (LT) orthorhombic phase and monclinic high temperature (HT) phase of Bi2WO6, respectively. Additionally phase dependent distinct morpholog... |
| Databáze: | OpenAIRE |
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