Synthesis and Characterization of Magnetite-Polysulfone Micro- and Nanobeads with Improved Chemical Stability in Acidic Media
Bogdan Stefan Vasile,
The phase-inversion process initiating form magnetite nanoparticles (MNPs) and polysulfone, in dimethylformamide (DMF)
15%w was performed to obtain the more chemically stable Fe3O4/polysulfone (PSf) micro and nanobeads. Finally, by spraying the polysulfone-
magnetite suspension into distilled water the Fe3O4/PSf micro and nanobeads were formed. The polysulfone plays dual role, such
as the one that’s of protecting magnetite in acidic media and the other of supporting the immobilization of the active groups which are involved
in water purification. The presence of the polymeric shell maximizes the stability of these micro and nanobeads in acidic, synthetic
environment to a great extent. The characterization of these Fe3O4/PSf suprastructures was performed by Fourier transform infrared
spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEMHRTEM)
and also according to their chemical stability in acidic and synthetic environment. This manuscript has been aimed towards the
development of new Fe3O4/polysulfone micro and nanobeads with increased chemical stability in acidic media. In acidic media,
Fe3O4/polysulfone micro and nanobeads are reported to become 500 times more chemically stable as compared to the pure Fe3O4
nanoparticles. The results of this research are promising enough to hope that the functionalization of these materials would be quite beneficial
in environmental applications – such as the removal of heavy metal from water and its purification.
Keywords: Magnetite nanoparticles, polysulfone embedded magnetite, acidic media stability.
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