Characterization and synthesis of Fe₃O₄@C nanoparticles by in-situ solid-phase method

Abstract

Fe3O4@C nanoparticles were successfully synthesized by an in situ solid-phase method using FeSO4, FeS2, and PVP K30 as the starting materials under the nitrogen atmosphere. In addition, the mechanism of the synthetic of Fe3O4@C nanoparticles was studied through in situ characterizations. The results showed that the pyrolysis of PVP K30 participated in the solid-phase reaction and resulted in the formation of carbon shells and a reduction in particle size. The structure of the Fe3O4@C nanoparticles was core–shell with the average particle size of ∼30 nm and the thickness of the carbon shell of ∼2 nm. Besides, the Raman spectrum revealed that the carbon shell mostly existed in the form of amorphous carbon. The surface area and the pore volume of the Fe3O4@C nanoparticles were estimated to be 37.74 m2 g−1 and 0.227 cm3 g−1. Magnetization hysteresis curve exhibited the values of coercivity and remanence and saturation magnetization are found to be approximately 0.16 kOe, 12.8 emu g−1, and 77 emu g−1, respectively.

Fenton-like Catalysts Based on Graphitic Carbon Nitride Nanosheets Decorated with Fe3O4 Nanoparticles for Removal of Colorless Tetracycline

“…FTIR spectra were also measured for various loading percentages of Fe 3 O 4 nanoparticles on the CN nanosheets, and they exhibited similar types of transmittance with respect to bare CN, suggesting that the functional groups remain unchanged even after 30% nanoparticle loading onto the CN surface (Figure B). In addition, a small peak was observed for the FCN composites at 570 cm –1 , indicating the Fe–O group . It can be observed that for all prepared FCN nanocomposites, the structural and functional groups were not changed.…”

“…In addition, a small peak was observed for the FCN composites at 570 cm −1 , indicating the Fe−O group. 36 It can be observed that for all prepared FCN nanocomposites, the structural and functional groups were not changed. demonstrating that there was an interaction between CN and Fe 3 O 4 in the heterostructure.…”