Olvera Salazar Arturo, García Hernández Margarita, López Camacho Perla Yolanda, López Marure Arturo, Reyes de la Torre Adriana Isabel, Morales Ramírez Ángel de Jesús, Hernández Santiago Felipe, Aguilera Vázquez Luciano
Universidad Del Valle de México Campus Lomas Verde, Paseo de las Aves No.1 Col. San Mateo Nopala. Naucalpan de Juárez, Edo. Méx. C.P. 53220, Mexico.
Tecnológico Nacional de México-Instituto Tecnológico de Ciudad Madero. Av. 1o. de Mayo esq. Sor Juana Inés de la Cruz s/n Col. Los Mangos Cd. Madero Tamaulipas C.P.89440, Mexico.
Mater Sci Eng C Mater Biol Appl. 2016 Dec 1;69:850-5. doi: 10.1016/j.msec.2016.07.061. Epub 2016 Jul 21.
This paper presents the synthesis of pure and europium-doped lutetium oxide (Lu2O3) powders prepared by sol-gel method. The influence of europium ion concentration into Lu2O3 nanocrystallites was investigated for first time in an in vitro system using a modified ABTS radical cation decolorization assay to determine the antioxidant activity. The crystalline structure of Lu2O3 and Eu:Lu2O3 powders was elucidated by XRD obtaining cubic phase in all system without secondary products in accordance with FT-IR results. By TEM and Scherrer equation, it was determined that Lu2O3 and Eu:Lu2O3 powders presented nearly spherical particle morphology with crystallites sizes in the range of 8 to 13nm. The antioxidant assays results revealed that europium ion enhance Lu2O3 powders antioxidant properties, showing that 12.5mol% of europium is sufficient to reach its maximum capacity.
本文介绍了通过溶胶-凝胶法制备的纯氧化镥（Lu2O3）粉末和铕掺杂氧化镥（Eu:Lu2O3）粉末的合成。首次在体外系统中，使用改良的ABTS自由基阳离子脱色测定法来测定抗氧化活性，研究了铕离子浓度对Lu2O3纳米微晶的影响。根据傅里叶变换红外光谱（FT-IR）结果，通过X射线衍射（XRD）阐明了Lu2O3和Eu:Lu2O3粉末的晶体结构，所有体系均获得立方相且无副产物。通过透射电子显微镜（TEM）和谢乐方程确定，Lu2O3和Eu:Lu2O3粉末呈现出近球形颗粒形态，微晶尺寸在8至13纳米范围内。抗氧化测定结果表明，铕离子增强了Lu2O3粉末的抗氧化性能，表明12.5mol%的铕足以达到其最大容量。
