Abstract
Anodization of Zr and Fe foils in fluoride ethylene glycol produced surface oxide with nanotubular structure. After heat treatment, surface oxide on Fe foil crystalized to predominantly α-Fe2O3 (hematite) and on Zr foil tetragonal/monoclinic ZrO2 was produced. Anodization of both Zr and Fe for anodic nanotubes formation were done in ethylene glycol/NH4F/KOH electrolyte at 50 – 60 V. The anodized foils were used as photoanode in a photoelectrochemical (PEC) cell. At 0.5 V vs Ag/AgCl, photocurrent of a PEC cell comprising of α-Fe2O3 photoanode was 0.22 mA cm−2. PEC with ZrO2 photoanode displayed smaller photocurrent of 0.02 mA cm−2 at 0.5 V in 1M NaOH electrolyte.
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