CoFe2 O4 -TiO2 Hybrid Nanomaterials: Synthesis Approaches Based on the Oil-in-Water Microemulsion Reaction Method

• Published in: Journal of nanomaterials 2017-01, Vol.2017
• Main Authors: Rodriguez-Rodriguez, Arturo Adrian, Martinez-Montemayor, Sagrario, Leyva-Porras, Cesar Cutberto, Longoria-Rodriguez, Francisco Enrique, Martinez-Guerra, Eduardo, Sanchez-Dominguez, Margarita
• Format: Article
• Language: English
• Subjects: Emission analysis; Inductively coupled plasma; Nanomaterials; Nanoparticles; Seeds; Spectroscopy; Synthesis; Titanium dioxide
• ISSN: 1687-4110; 1687-4129
• DOI: 10.1155/2017/2367856

CoFe sub(2) O sub(4) nanoparticles decorated and wrapped with TiO sub(2) nanoparticles have been prepared by mixing well-dispersed CoFe sub(2) O sub(4) with amorphous TiO sub(2) (impregnation approach) and growing amorphous TiO sub(2) over the magnetic core (seed approach), respectively, followed by thermal treatment to achieve TiO sub(2) 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 CoFe sub(2) O sub(4) and tetragonal anatase TiO sub(2) . 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 TiO sub(2) predominance over CoFe sub(2) O sub(4) 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 TiO sub(2) , 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 CoFe sub(2) O sub(4) -TiO sub(2) nanostructured hybrids.