Economically viable synthesis of Fe₃O₄ nanoparticles and their characterization

Abstract

Economically viable synthesis of Fe3O4 nanoparticles and their characterization Nano iron oxide particles (Fe3O4) were synthesized by coprecipitation of Fe2+ and Fe3+ by ammonia solution in the aqueous phase. Various instrumentation methods such as X ray Diffractometry (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infrared (FTIR) spectroscopy, Brunauer-Emmett-Teller (BET) and Vibrating Sample Magnetometery (VSM) were used to characterize the properties of nanoparticles. The size of the nanoparticles was measured and was found to be between 10 to 15 nm. The value of saturation magnetization of the nanoparticles was found to be 55.26 emu/g. The BET surface area of nano iron oxide particles measured to be 86.55 m2/g.

Degradation of sulfamethazine antibiotics using Fe3O4–Mn3O4 nanocomposite as a Fenton‐like catalyst

“…(b) we can see that the peaks at around 616 cm −1 , 492 cm −1 , 400 cm −1 can be assigned to the Mn–O band, consistent with the results of Ocana and Yang et al On Fig. (c), the peaks at 583 cm −1 correspond to Fe–O band in Fe 3 O 4 . The peaks centered at 590 cm −1 and 527 cm −1 in Fig.…”

“…The coercivity and remanence were almost zero which confirms the superparamagnetic properties. The Ms of Fe 3 O 4 /Mn 3 O 4 composites is lower than that of Fe 3 O 4 (55.26 A•m 2 kg −1 ) synthesized with the same method, which can be attributed to the addition of Mn 3 O 4 . The Fe 3 O 4 /Mn 3 O 4 composites can be easily separated and rescued with an external magnetic field.…”

“…The specific surface areas (S BET ), pore volume and pore size were 124.1 m 2 g −1 , 0.3231 cm 3 g −1 and 4.5 nm, respectively. The surface area was larger than that of Fe 3 O 4 MNPs (86.55 m 2 g −1 ) prepared by Srivastava et al with an impregnation method; it is almost equivalent to that of Fe 3 O 4 /hierarchial‐Mn 3 O 4 /graphene oxide (180.78 m 2 g −1 ) prepared by Yang et al The pollutants can be easily adsorbed onto the catalsyt surface due to the large surface area, which enhances the reaction efficiency.…”

“…There are three peaks in the deconvolution of O 1 s spectrum. Peaks at 539.1 eV, 530.5 eV and 529.4 eV, correspond to H 2 O (adsorbed on catalyst), M‐OH (hydroxyl bonded to metal), M–O (metal oxide or chemisorbed oxygen), respectively. Compared with spectrum before the reaction, the oxidation state of Fe, Mn and O after the reaction changed little, which is in good agreement with the XRD results.…”

“…8(c), the peaks at 583 cm −1 correspond to Fe-O band in Fe 3 O 4 . 32 The peaks centered at 590 cm −1 and 527 cm −1 in Fig. 8(a) suggested the coexistence of Fe-O and Mn-O in the composities.…”