4.7 Article

Improved Solvothermal Synthesis of γ-Fe2O3 Magnetic Nanoparticles for SiO2 Coating

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NANOMATERIALS
卷 11, 期 8, 页码 -

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MDPI
DOI: 10.3390/nano11081889

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co-precipitation; core-shell nanoparticle; iron-oxide; magnetic nanoparticle; silica coated magnetic nanoparticle; solvothermal; surfactant

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  1. [722171]
  2. [829040]

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Monodisperse magnetic gamma-Fe2O3 nanoparticles (MNPs) were prepared using SDS and PEG 6000 as double capping reagents, leading to improved uniformity and colloidal stability. These MNPs with silica coatings can be used in a variety of applications, such as magnetic separation, catalysis, and templated nanogel synthesis.
Monodisperse magnetic gamma-Fe2O3 nanoparticles (MNPs) were prepared by a simple, improved, one-pot solvothermal synthesis using SDS and PEG 6000 as double capping reagents. This double protecting layer afforded better MNP uniformity (Z average 257 +/- 11.12 nm, PDI = 0.18) and colloidal stability. Materials were characterized by DLS, SEM, TEM, XPS, and XRD. The use of these MNPs in the synthesis of core-shell structures with uniform and tunable silica coatings was demonstrated, as silica coated MNPs are important for use in a range of applications, including magnetic separation and catalysis and as platforms for templated nanogel synthesis.

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