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Journal of Nanomaterials
Volume 2017 (2017), Article ID 2367856, 15 pages
https://doi.org/10.1155/2017/2367856
Research Article

CoFe2O4-TiO2 Hybrid Nanomaterials: Synthesis Approaches Based on the Oil-in-Water Microemulsion Reaction Method

1Centro de Investigación en Materiales Avanzados S. C. (CIMAV) Unidad Monterrey, Alianza Norte 202, Parque de Investigación e Innovación Tecnológica, 66628 Apodaca, NL, Mexico
2Centro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, 25294 Saltillo, COAH, Mexico
3Centro de Investigación en Materiales Avanzados, S.C. (CIMAV), Av. Miguel de Cervantes Saavedra 120, Complejo Industrial Chihuahua, 31136 Chihuahua, CHIH, Mexico

Correspondence should be addressed to Margarita Sánchez-Domínguez

Received 16 November 2016; Accepted 18 January 2017; Published 8 March 2017

Academic Editor: P. Davide Cozzoli

Copyright © 2017 Arturo Adrián Rodríguez-Rodríguez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

CoFe2O4 nanoparticles decorated and wrapped with TiO2 nanoparticles have been prepared by mixing well-dispersed CoFe2O4 with amorphous TiO2 (impregnation approach) and growing amorphous TiO2 over the magnetic core (seed approach), respectively, followed by thermal treatment to achieve TiO2 crystallinity. Synthesis strategies were based on the oil-in-water microemulsion reaction method. Thermally treated nanomaterials were characterized in terms of structure, morphology, and composition, to confirm hybrid nanoparticles formation and relate with the synthesis approaches; textural, optical, and magnetic properties were evaluated. X-ray diffraction revealed coexistence of cubic spinel-type CoFe2O4 and tetragonal anatase TiO2. Electron microscopy images depicted crystalline nanoparticles (sizes below 25 nm), with homogeneous Ti distribution for the hybrid nanoparticles synthesized by seed approach. EDX microanalysis and ICP-AES corroborated established chemical composition. XPS evidenced chemical states, as well as TiO2 predominance over CoFe2O4 surface. According to BET measurements, the hybrid nanoparticles were mesoporous. UV-Vis spectroscopy showed optical response along the UV-visible light region. Magnetic properties suggested the breaking order of magnetic domains due to modification with TiO2, especially for mediated seed approach sample. The properties of the obtained hybrid nanoparticles were different in comparison with its individual components. The results highlight the usefulness of designed microemulsion approaches for the straightforward synthesis of CoFe2O4-TiO2 nanostructured hybrids.