Fabrication of zero valent iron (ZVI) nanotube film via potentiostatic anodization and electroreduction

摘要

Zero valent iron has been successfully used for the degradation of a wide range of contaminants.nHowever, this reaction of using ZVI particle produces a large quantity of iron sludge. To solve thenproblem, we report the synthesis of self-organized nanoporous zero valent iron film treated withnanodization and electro-reduction of iron foil. The iron nanotubes were fabricated in 1MnNa2SO4 + 0.5wt% NaF electrolyte by supplying constant electric currents of 50mV/s, and holdingnthe potential at 20, 40 and 60 V for 20min. Nanoporous shape was produced by anodic oxidationnof iron film. After anodizing process, electro-reduction of nanoporous iron film convertedncrystallization iron oxide to zero valent iron. Electro-reduction process was carried out bynelectro-reducing with powersupply to and holding the potential at 20 V for 20min. The surface ofniron nanotube film was examined by BET and the thickness of the oxidized films was evaluatednby scanning electron microscope (SEM). The crystalline structures of the fabricated films werenevaluated using X-ray diffraction (XRD).