Preparation of Nanometer γ‐Fe₂O₃ by an Electrochemical Method in Non‐aqueous Medium and Reaction Dynamics

The synthesis of nanosized γ‐Fe₂O₃ through an electrochemical process in non‐aqueous medium, then calcining at 300°C is studied. The product obtained is characterized by XRD, SEM, Electron diffraction and Particle size distribution analysis, indicating that the fine‐particle is a nanometer γ‐Fe₂O₃ with a spherical‐shaped, an average size of 22.0 nm. From the VSM (vibrating sample magnetometer) test, the particle's coercivity (49.0 Oe) is rather small, presenting excellent superparamagnetism. Furthermore, the reaction dynamics and mechanism are explored by linear sweep voltammetry (LSV); the rate constants are accordingly determined.

Keywords:

• electrochemical synthesis
• nanosized Fe₂O₃
• non‐aqueous medium
• reaction kinetics