Synthesis of Iron Oxide Nanoparticles Using Isobutanol

Figure 5

SEM micrographs of iron oxide samples: (a, b) S4 (0.4 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C); (c, d) S5 (0.4 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C and calcined at 300°C for 2 h); (e, f) S8 (0.09 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C).

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