Synthesis and characterization of Fe3O4@MoO3 nanoparticles

Magnetic particles play an important role in biomedical applications, for instance,nanoprobes [1-2]. In this study, we demonstrated the synthesis of a new core-shell nanoparticle (Fe3O4@MoO3) by using Fe3O4 nanoparticles and ammonium heptamolybdate and characterization of its structure by some spectroscopic methods like FT-IR, scanning electron microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray powder diffraction patterns (XRD) and MAP analysis. In this work we prepared new core-shell nanoparticles (Fe3O4@MoO3) by reflux of Fe3O4 and ammonium heptamolybdate in ethylene glycol with a rapid method [3]. Firstly, Fe3O4 nanoparticles were synthesized by a solvothermal method. Then 100 mg of Fe3O4 nanoparticles were dispersed in a round bottom flask containing 50 mL ethylene glycol. Then a solution of 617 mg of ammonium heptamolybdate in 10 mL deionized water was added to the flask and the mixture was refluxed at 160 C for 12 hours. The obtained black products were filtered out and washed with absolute ethanol and distilled water several times to remove impurities and dried in an oven 60 C for 4 hours