Synthesis and Luminescent Properties of REVO4–REPO4 (RE = Y, Eu, Gd, Er, Tm, or Yb) Heteronanostructures: A Promising Class of Phosphors for Excitation from NIR to VUV
| Autor: | Paulo C. de Sousa Filho, Thierry Gacoin, Jean-Pierre Boilot, Richard I. Walton, Osvaldo Antonio Serra |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Annealing (metallurgy) Vanadium chemistry.chemical_element Nanoparticle Nanotechnology Phosphor engineering.material Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Coating chemistry Chemical engineering engineering Vanadate Nanorod Physical and Theoretical Chemistry Luminescence |
| Zdroj: | The Journal of Physical Chemistry C. 119:24062-24074 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Despite presenting very similar structural properties, rare earth (RE) phosphate and vanadate solids display different spectroscopic behaviors, which makes the elaboration of REVO4–REPO4 mixed structures an interesting prospect for the design of luminescent materials with improved activity. This work describes the application of a two-step colloidal precipitation approach for the formation of REVO4–REPO4 heteronanostructures and an investigation of their luminescent properties. The growth of the phosphate phase over REVO4 particles was kinetically evaluated through spectroscopic methodologies comprising the observation of the VO43– → Eu3+ energy transfer and the absorption of vanadium(V) peroxocomplexes in solution. This confirmed an effective coating of the precursor nanoparticles. In order to obtain materials with enhanced properties, a protected annealing methodology in SiO2 was applied, leading to highly crystalline nanorods with low degree of aggregation. The final materials display efficient emissio... |
| Databáze: | OpenAIRE |
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