Akaganeite-type b-FeO(OH) nanocrystals: preparation and characterization
The preparation of nanocrystalline b-FeO(OH) by precipitation from an aqueous solution of the chloride salt and the investigation of relative surface properties of the iron oxyhydroxide gel were the aims of this study. A new advantageous method using ammonium carbonate as precipitating agent is presented by which the synthesis of akaganeite(b-FeO(OH) was accomplished. Akaganeite was transformed to iron oxide hydroxide (FeOOH) and ®nally to hematite(a-Fe2O3) after thermal treatment at 473 and 673 K, respectively. The use of a volatile agent for the hydrolysis process, the special method of chloride ion removal, as well as the freeze-drying technique, led to the production of a material consisting of nanocrystals with high surface area and defined pore size distribution.
Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Θετικών Επιστημών, Τμήμα Χημείας
Microporous and Mesoporous Materials, vol.42  p.49-57 [Published Version]
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