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dc.contributor.author
Calvache Muñoz, Jazmín
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dc.contributor.author
Prado Espinosa, Fabiola Andrea
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dc.contributor.author
Rodriguez Paez, Jorge Enrique
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dc.date.available
2018-12-04T18:49:22Z
dc.date.issued
2017-09-25
dc.identifier.citation
Calvache Muñoz, Jazmín; Prado Espinosa, Fabiola Andrea; Rodriguez Paez, Jorge Enrique; Cerium oxide nanoparticles: Synthesis, characterization and tentative mechanism of particle formation; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 529; 25-9-2017; 146-159
dc.identifier.issn
0927-7757
dc.identifier.uri
http://hdl.handle.net/11336/65762
dc.description.abstract
Given the scientific and technological interest in cerium oxide (ceria), in this paper nanoparticles of ceria (ceria-NPs) were synthesized using a modified polymer complex process (modified Pechini), while varying the pH of the system. This methodology made it possible to obtain, in a reproducible and controlled way, nanoparticles of ceria (<100 nm) of a high chemical purity at low temperatures. The precalcined cerium solid obtained at 350 °C was characterized using differential thermal analysis (DTA), thermogravimetric analysis (TG) and IR spectroscopy. Very little organic phase was found in the respective spectra, indicating that the inorganic phase, cerium oxide, is predominant. Carbonaceous residues still present in the solids were removed by heating at temperatures above 500 °C and the samples obtained were characterized using X-ray diffraction (XRD), IR, UV–vis absorption and diffuse reflectance spectroscopies, and Transmission Electron Microscopy (TEM). The diffractograms of the samples showed that the only crystalline phase present was CeO2. From the results of UV-vis absorption and diffuse reflectance spectroscopy, two important energy values were obtained, 3.8 eV and 3.4 eV. These could be attributed to the energy gap value (3.8 eV) and to a possible “mid-gap” (3.4 eV). Furthermore, on increasing the synthesis pH, a reduction in particle size results, the particle being between 10 and 20 nm, with a spheroidal shape. By looking at the different stages of the synthesis process, a mechanism is proposed to explain how nanoparticles of ceria are formed.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Ceria-Nps
dc.subject
Characterization
dc.subject
Mechanism of Formation
dc.subject
Synthesis
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.subject.classification
Nano-procesamiento
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dc.subject.classification
Nanotecnología
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Cerium oxide nanoparticles: Synthesis, characterization and tentative mechanism of particle formation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-23T14:50:06Z
dc.journal.volume
529
dc.journal.pagination
146-159
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Calvache Muñoz, Jazmín. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad del Cauca; Colombia
dc.description.fil
Fil: Prado Espinosa, Fabiola Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad del Cauca; Colombia
dc.description.fil
Fil: Rodriguez Paez, Jorge Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad del Cauca; Colombia
dc.journal.title
Colloids and Surfaces A: Physicochemical and Engineering Aspects
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1016/j.colsurfa.2017.05.059
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S092777571730506X
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