Synthesis of Iron Oxide Nanoparticles Using Isobutanol

Figure 8

Magnetic hysteresis curves measured at room temperature for iron oxide samples: (a) S1 (0.09 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C); (b) S2 (0.09 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C and calcined at 300°C for 2 h); (c) S4 (0.4 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C); (d) S5 (0.4 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C and calcined at 300°C for 2 h).

(a) S1 synthesized at 75°C

(b) S2 calcined at 300°C for 2 h

(c) S4 synthesized at 75°C

(d) S5 calcined at 300°C for 2 h