Título

Sol-gel synthesis and antioxidant properties of yttrium oxide nanocrystallites incorporating P-123

Autor

HIRAM ISAAC BELTRAN CONDE

Nivel de Acceso

Acceso Abierto

Referencia de publicación

ISSN/1996-1944

Referencia de datos

doi: 10.3390/ma7096768

Resumen o descripción

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 Y2O3 matrix. 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

Editor

Materials 2014, 7, 6768-6778;

Fecha de publicación

2014

Tipo de publicación

Artículo

Formato

application/pdf

Idioma

Inglés

Repositorio Orígen

Concentración de Recursos de Información Científica y Académica, UAM Cuajimalpa

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