首页|Synthesis and characterization of Fe_3O_4-NH_2 and Fe_3O_4-NH_2-chitosan nanoparticles
Synthesis and characterization of Fe_3O_4-NH_2 and Fe_3O_4-NH_2-chitosan nanoparticles
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NSTL
Fe_3O_4 nanoparticles were synthesized and functionalized with (3-aminopropyl) trimethoxysilane (APTMS) and chitosan, forming Fe_3O_4-NH_2 and Fe_3O_4-NH_2-chitosan nanoparticles. The Fe_3O_4 nanoparticles were synthesized by a co-precipitation method and functionalization was performed in further stages. The nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), zeta potential, and transmission electron microscopy (TEM). The results of XRD showed that magnetite did not experience an oxidation reaction. The functionalization of the surface of Fe_3O_4 nanoparticles was confirmed by FTIR and zeta potential measurements. The TEM results showed a thin layer around Fe_3O_4 nanoparticles due to the functionalization with the APTMS. The later functionalization by chitosan contributed to the agglomeration of nanoparticles. Functionalization provided the nanoparticles better colloidal stability mainly for a pH below 7 and this improvement was related to the protection and new functional groups from the APTMS and chitosan.
NSTL
