Figure 4
(a) UV–Vis spectra of α-Fe2O3 before (1) and after (2) annealing, (b) linear sweep voltammetry curve under dark (1) and light (2) conditions c) Chronoamperometric curve of α-Fe2O3 under the light on–off conditions at 0.5 V potential and d) Nyquist plot under the dark (1) and light (2) condition at in 0.5 M NaOH 0.1 Hz to 10 kHz frequency range and 5 mV AC RMS amplitude. The area of the exposed electrode is 1.5 cm2.
