Understanding the formation and growth of Ag nanoparticles on silver chromate induced by electron irradiation in electron microscope: A combined experimental and theoretical study
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Altres documents de l'autoria: Fabbro, Maria T.; Gracia, Lourdes; Silva, Gabriela S.; Santos, Luís P. S.; Andres, Juan; Cordoncillo, Eloisa; Longo, Elson
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Títol
Understanding the formation and growth of Ag nanoparticles on silver chromate induced by electron irradiation in electron microscope: A combined experimental and theoretical studyAutoria
Data de publicació
2016Editor
ElsevierISSN
0022-4596Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S0022459616301232Versió
info:eu-repo/semantics/acceptedVersionParaules clau / Matèries
Resum
Ag2CrO4 microcrystals were synthesized using the co-precipitation method. These microcrystals were
characterized through X-ray diffraction (XRD) with Rietveld analysis, field-emission scanning electron
microscopy ... [+]
Ag2CrO4 microcrystals were synthesized using the co-precipitation method. These microcrystals were
characterized through X-ray diffraction (XRD) with Rietveld analysis, field-emission scanning electron
microscopy (FE-SEM), transmission electron microscopy (TEM) with energy-dispersive spectroscopy
(EDS), micro-Raman (MR). XRD patterns and Rietveld refinement data showed that the material exhibits
an orthorhombic structure without any deleterious phases. FE-SEM and TEM micrographs revealed the
morphology and the growth of Ag nanoparticles on Ag2CrO4 microcrystals during electron beam irradiation.
These events were directly monitored in real-time. Their optical properties were investigated
using ultraviolet-visible (UV–vis) diffuse reflectance spectroscopy that allowed the calculation of the
optical band gap energy. Theoretical analyses based on the density functional theory level indicate that
the incorporation of electrons is responsible for structural modifications and formation of defects on the
[AgO6] and [AgO4] clusters, generating ideal conditions for the growth of Ag nanoparticles. [-]
Publicat a
Journal of Solid State Chemistry 239 (2016) 220–227Drets d'accés
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