SYNTHESIS AND CHARACTERIZATION MESOPOROUS MAGNETITE IN THE PRESENCE OF L-LEUCINAMIDE

In this paper the synthesis of mesoporous magnetite nanoparticles using leucinamide as stabilizer agent is presented. Mesoporous magnetite nanoparticles were obtained through precipitation method. For this purpose, the precursors (Fe2+ and Fe3+) solution was sprayed into a sodium hydroxide (for obtaining pure Fe3O4) and sodium hydroxide / L-leucinamide precipitation bath (for obtaining Fe3O4@LEU) issuing a black precipitate. In order to determinate the structure and morphology of the Fe3O4 and Fe3O4/leucinimide nanoparticles the following methods were used: Fourier transform infrared spectroscopy (IR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM). The Brunauer-Emmett-Teller (BET) analysis revealed a mesoporous structure for the samples with a specific surface area of about 156m2/g (unstabilized Fe3O4 nanoparticles) and 147 m2/g (for the stabilized Fe3O4 nanoparticles) which proves, along with FTIR, SEM and even XRD data, that the presence of the leucinamide leads to an increase of the hydrodynamic size. The average pore size of the MNPs is about 5-6 nm which means that mesoporous materials were obtained