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Novel synthetic routes of large-pore magnetic mesoporous nanocomposites (SBA-15/Fe3O4) as potential multifunctional theranostic nanodevices

Abstract

In this paper, novel magnetic silica nanocomposites were prepared by anchoring magnetite nanoparticles onto the outer surface of mesoporous SBA-15 silica; magnetic nanoparticles were prepared by microemulsion and solvothermal methods, varying the synthesis conditions in order to control the final physicochemical, textural and magnetic properties. The morphology and mesostructure of the materials were characterized by X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), N2 adsorption–desorption, Transmission and Scanning Electron Microscopy (TEM and SEM). Magnetic silica nanocomposites feature a two-dimensional hexagonal arrangement constituted by an homogeneous pore channels system with diameters between 13 and 18 nm and Brunauer–Emmett–Teller (BET) surface area higher than 260 m2/g. The different morphologies of the samples are given by the presence of diverse magnetic nanoparticles arrangements covalently linked onto the outer surface of the mesoporous silica rods. This confers them a superparamagnetic behaviour with a magnetic response between 50-80 emu/g, even though the weight percent of magnetite present in the samples does not exceed 21.7%. In addition, the magnetic nanocomposites exhibit magnetic hyperthermia with moderate Specific Absorption Rate (SAR) values.

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Publication details

The article was received on 21 Jul 2017, accepted on 08 Nov 2017 and first published on 09 Nov 2017


Article type: Paper
DOI: 10.1039/C7TB01963G
Citation: J. Mater. Chem. B, 2017, Accepted Manuscript
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    Novel synthetic routes of large-pore magnetic mesoporous nanocomposites (SBA-15/Fe3O4) as potential multifunctional theranostic nanodevices

    Z. Vargas-Osorio, M. A. González-Gómez, Y. Pi�eiro, C. Vazquez-Vazquez, C. F. Rodríguez-Abreu, M. A. Lopez-Quintela and J. Rivas, J. Mater. Chem. B, 2017, Accepted Manuscript , DOI: 10.1039/C7TB01963G

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