Enhanced Water Splitting by Fe₂O₃-TiO₂-FTO Photoanode with Modified Energy Band Structure

Figure 4

SEM photos of (a) Fe(NO₃)₃ powders heat treated at 500°C for 10 min, and (b), (c), (d) correspond to Figures 3(b), 3(c), and 3(d), respectively.

(a)

(b)

(c)

(d)