Preparation of a Porous Iron Oxyhydroxide from Layered Double Hydroxides Precursors

Abstract

Three LDHs (Layered Double Hydroxides) with hydrotalcite type structure were synthesized by a modified coprecipitation method, and the corresponding oxides LDOs were prepared by calcinating LDHs in air. The as-synthesized LDHs and LDOs were characterized by XRD and elemental analysis. Dilute nitric acid was employed for the selective extraction of LDHs and LDOs to obtain porous ferrihydrites, which were further characterized by XRD, TEM, TG-DTA, IR, and BET gas sorptometry measurement for specific surface area and pore volume.