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Open AccessArticle

Sol-Gel Synthesis and Antioxidant Properties of Yttrium Oxide Nanocrystallites Incorporating P-123

Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana-Unidad Cuajimalpa, 4871 Avenida Vasco de Quiroga, Colonia Santa Fé Cuajimalpa, Delegación Cuajimalpa de Morelos, C.P. 05300 Mexico, D.F., Mexico
Instituto Politécnico Nacional-Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA) Unidad Altamira, Carretera Tampico Puerto Industrial Altamira, Km 14.5 Altamira, C.P. 89600 Tamaulipas, Mexico
Instituto Politécnico Nacional-Centro de Investigación e Innovación Tecnológica (CIITEC), Cerrada de Cecati s/n, Col. Santa Catarina, Del. Azcapotzalco, C.P. 02250 Mexico, D.F., Mexico
Author to whom correspondence should be addressed.
Materials 2014, 7(9), 6768-6778;
Received: 25 June 2014 / Revised: 30 August 2014 / Accepted: 5 September 2014 / Published: 19 September 2014
(This article belongs to the Special Issue Selected Papers from the 1st International e-Conference on Materials)
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. View Full-Text
Keywords: yttrium oxide (Y2O3); nanocrystallites; sol-gel; antioxidant properties yttrium oxide (Y2O3); nanocrystallites; sol-gel; antioxidant properties
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Mellado-Vázquez, R.; García-Hernández, M.; López-Marure, A.; López-Camacho, P.Y.; De Jesús Morales-Ramírez, Á.; Beltrán-Conde, H.I. Sol-Gel Synthesis and Antioxidant Properties of Yttrium Oxide Nanocrystallites Incorporating P-123. Materials 2014, 7, 6768-6778.

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