TY - JOUR
T1 - Effect of PEO–PPO–PEO triblock copolymers in the synthesis of magnetic nanoparticles embedded in SiO2and TiO2matrices by sol–gel method
AU - Valverde-Aguilar, Guadalupe
AU - Pérez-Mazariego, José Luis
AU - Marquina, Vivianne
AU - Gómez, Raúl
AU - Aguilar-Franco, Manuel
AU - Garcia-Macedo, Jorge
N1 - Publisher Copyright:
© 2014, Springer Science+Business Media New York.
PY - 2014/11/22
Y1 - 2014/11/22
N2 - Hematite and maghemite nanoparticles embedded in silica and titanium dioxide matrices were obtained by sol–gel method. A mixture of precursor solutions of SiO2and TiO2doped with Fe3O4salt templated by the addition of PEO–PPO–PEO triblock copolymers in a concentration of 12.1 wt% PF127 (SiO2) and 4.1 wt% P123 (TiO2) produces very stable magnetic particles with average size between 5 and 10 nm. These neutral surfactants allow the control of the morphology and crystal phase of these magnetic nanoparticles, and stabilize the nanoparticles to avoid their aggregation. The samples were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, and infrared and Mössbauer spectroscopies. Mössbauer results show that maghemite is the majority species in the SiO2matrix (61.3 %) and TiO2(63.0 %), respectively.
AB - Hematite and maghemite nanoparticles embedded in silica and titanium dioxide matrices were obtained by sol–gel method. A mixture of precursor solutions of SiO2and TiO2doped with Fe3O4salt templated by the addition of PEO–PPO–PEO triblock copolymers in a concentration of 12.1 wt% PF127 (SiO2) and 4.1 wt% P123 (TiO2) produces very stable magnetic particles with average size between 5 and 10 nm. These neutral surfactants allow the control of the morphology and crystal phase of these magnetic nanoparticles, and stabilize the nanoparticles to avoid their aggregation. The samples were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, and infrared and Mössbauer spectroscopies. Mössbauer results show that maghemite is the majority species in the SiO2matrix (61.3 %) and TiO2(63.0 %), respectively.
UR - http://www.scopus.com/inward/record.url?scp=84973861012&partnerID=8YFLogxK
U2 - 10.1007/s10853-014-8630-4
DO - 10.1007/s10853-014-8630-4
M3 - Artículo
SN - 0022-2461
VL - 50
SP - 704
EP - 716
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 2
ER -