Preparation and characterization of α-Fe₂O₃/Fe₃O₄ heteroplasmon nanoparticles via the hydrolysis-combustion-calcination process of iron nitrate

Abstract

In this work, a feasible and facile hydrolysis-combustion-calcination process of ferric nitrate for the preparation of magnetic α-Fe2O3/Fe3O4 heteroplasmon nanoparticles was represented. The influences of hydrolysis time, hydrolysis temperature, Fe3+ concentration, anhydrous ethanol volume, calcination time, and calcination temperature on the properties of α-Fe2O3/Fe3O4 heteroplasmon nanoparticles were investigated. According to a series of characterization analysis, the optimal preparation conditions were confirmed: 0.05 M Fe(NO3)3·9H2O was hydrolyzed at 90 ℃ for 8 h, and then the precursor was calcined at 200 ℃ for 2 h with 20 mL anhydrous ethanol. While, the morphology of α-Fe2O3/Fe3O4 heteroplasmon were spherical structures with the average particle size of about 46 nm, and their saturation magnetization was 54 emu g-1. The α-Fe2O3/Fe3O4 heteroplasmon nanoparticles possessed controllable magnetic properties and a more stable state, which suggested promising applications.

Photocatalytic Dye Degradation and Bio-Insights of Honey-Produced α-Fe2O3 Nanoparticles

“…Figure 6 shows the (αhν)2 ~hν curves of the prepared samples. The bandgap energies of FNH at 2.01 eV, which were close to the literature values for the indirect bandgap of α-Fe 2 O 3 [37][38][39][40][41], are compared in Table 2. The narrow bandgap energy shows the formation of iron oxide nanoparticles and their optical imperfections.…”

Fabrication of magnetic α-Fe2O3/Fe3O4 heterostructure nanorods via the urea hydrolysis-calcination process and their biocompatibility with LO2 and HepG2 cells

“…According to the morphologies of nanomaterials, they can be divided into many species such as nanoparticles [23], nanosheets [24], nanotubes [25], and nanorods [26], etc Compared with other nanomaterials, nanorods are often used as targeted carriers because they are easier to penetrate cell membranes, etc [27]. Therefore, magnetic α-Fe 2 O 3 /Fe 3 O 4 heterostructure nanorods are chosen as the targeted drug carrier.…”