Synthesis of Iron Oxide Nanoparticles Using Isobutanol

Figure 3

FTIR spectra of four iron oxide samples: (a) S1 (0.09 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C), (b) S3 (0.09 M FeCl₂·4H₂O with 0.8 M NaOH at 90°C and calcined at 500°C for 2 h), (c) S5 (0.4 M FeCl₂·4H₂O with 0.8 M NaOH at 75°C and calcined at 300°C for 2 h), and (d) S14 (0.1 M Fe(NO₃)₃·9H₂O with NH₄OH at 75°C).