Akaganéite-type β-FeO(OH) nanocrystals: preparation and characterization
| Autor: | Anastasios I. Zouboulis, Konstantinos Matis, Eleni A. Deliyanni, L Nalbandian, D.N Bakoyannakis |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Ammonium carbonate
Aqueous solution Akaganéite Precipitation (chemistry) Inorganic chemistry Iron oxide General Chemistry Hematite engineering.material Condensed Matter Physics Chloride chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials visual_art medicine visual_art.visual_art_medium engineering Hydroxide General Materials Science medicine.drug |
| Zdroj: | Microporous and Mesoporous Materials. 42:49-57 |
| ISSN: | 1387-1811 |
| Popis: | The preparation of nanocrystalline β-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 (β-FeO(OH) was accomplished. Akaganeite was transformed to iron oxide hydroxide (FeOOH) and finally to hematite (α-Fe 2 O 3 ) 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect