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Título : | Sol-gel synthesis and antioxidant properties of yttrium oxide nanocrystallites incorporating P-123 |
Autor : | MELLADO VÁZQUEZ, R. GARCÍA HERNÁNDEZ, M. LÓPEZ MARURE, ARTURO LÓPEZ CAMACHO, P. Y. MORALES RAMÍREZ, A.J. BELTRÁN CONDE, H.I. |
Fecha de publicación : | 29-jul-2015 |
Citación : | Materials;Volume 6, Issue 9, 2014, Pages 6768-6778 |
Resumen : | Yttrium oxide (Y2O3) nanocrystallites were synthesized by mean of a sol-gel method using two different precursors. Raw materials used were yttrium nitrate and yttrium chloride, in methanol. In order to promote oxygen vacancies, P-123 poloxamer was incorporated. Synthesized systems were heat-treated at temperatures from 700 °C to 900 °C. Systems at 900 °C were prepared in the presence and absence of P-123 using different molar ratios (P-123:Y = 1:1 and 2:1). Fourier transform infrared spectroscopy (FTIR) results revealed a characteristic absorption band of Y-O vibrations typical of Y2O3matrix. The structural phase was analyzed by X-ray diffraction (XRD), showing the characteristic cubic phase in all systems. The diffraction peak that presented the major intensity corresponded to the sample prepared from yttrium chloride incorporating P-123 in a molar ratio of P-123:Y = 2:1 at 900 °C. Crystallites sizes were determined by Scherrer equation as between 21 nm and 32 nm. Antioxidant properties were estimated by 2,2-diphenyl-1-picrylhydrazyl (DPPH•) assays; the results are discussed. © 2014 by the authors. |
URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/21608 |
ISSN : | 19961944 |
Aparece en las colecciones: | Artículos |
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