Akaganeite-type β-FeO(OH) nanocrystals:: preparation and characterization

被引:100
作者
Deliyanni, EA
Bakoyannakis, DN [1 ]
Zouboulis, AI
Matis, KA
Nalbandian, L
机构
[1] Aristotelian Univ Salonika, Dept Chem, Lab Gen & Inorgan Chem Technol, GR-54006 Salonika, Greece
[2] Chem Proc Engn Res Inst, GR-57001 Salonika, Greece
关键词
Akaganeite; iron oxide hydroxide; nanocrystals; hematite;
D O I
10.1016/S1387-1811(00)00259-6
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The preparation of nanocrystalline beta -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 (beta -FeO(OH) was accomplished. Akaganeite was transformed to iron oxide hydroxide (FeOOH) and finally to hematite (alpha -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. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:49 / 57
页数:9
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