FeOOH nanorods array and its application in the photoreduction of Cr(VI)

Abstract FeOOH nanorod array was synthesized utilizing a facile hydrothermal method. The photoreduction efficiency to Cr(VI) is 70% after 4 h illumination at pH  16  cm −3 . The best anodic photo-current is 90 nA/cm 2 under illumination of light with intensity of 0.02 W/cm 2 . The onset potential of photo-current is −0.2 V (vs. Ag/AgCl (Sat. KCl)), which indicates the FeOOH nanorods array has an active interface.