TY - JOUR
T1 - Sol-gel synthesis and antioxidant properties of yttrium oxide nanocrystallites incorporating P-123
AU - Mellado-Vázquez, Rebeca
AU - García-Hernández, Margarita
AU - López-Marure, Arturo
AU - López-Camacho, Perla Yolanda
AU - Morales-Ramírez, Ángel de Jesús
AU - Beltrán-Conde, Hiram Isaac
N1 - Publisher Copyright:
© 2014 by the authors.
PY - 2014
Y1 - 2014
N2 - 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.
AB - 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.
KW - Antioxidant properties
KW - Nanocrystallites
KW - Sol-gel
KW - Yttrium oxide (YO)
UR - http://www.scopus.com/inward/record.url?scp=84920942048&partnerID=8YFLogxK
U2 - 10.3390/ma7096768
DO - 10.3390/ma7096768
M3 - Artículo
SN - 1996-1944
VL - 6
SP - 6768
EP - 6778
JO - Materials
JF - Materials
IS - 9
ER -