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Preparation of Akaganeite Nanorods and Their Transformation to Sphere Shape Hematite

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Akaganeite (-FeOOH) nanorods were synthesized through hydrolysis of FeCl3 and FeCl2 solutions containing urea in the temperature range from 90 to 95 °C under reflux condition for 8 h. The average diameters and lengths of nanorods were impacted by FeCl2 and urea. Upon heating the solution containing FeCl3, FeCl2 and urea, the average diameters were about 80 nm and lengths of nanorods were about 1.2 m. The morphologies of -FeOOH nanorods in different growth times were shown by TEM images. More interestingly, in the growth process of nanorods, they can self-assemble and form cross structure. The ultrasonic might promote effectively the formation of the nano-cross structure. -FeOOH nanorods were calcined and the influence of the calcining temperature and time about the morphology and size of the powder was studied. By heating -FeOOH nanorods at 800 °C for 6 hours, the hematite in sphere shape was obtained and the forming mechanism was discussed.
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Document Type: Research Article

Publication date: 2008-08-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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