Iron oxide synthesis using a continuous hydrothermal and solvothermal system
Iron oxide synthesis using a continuous hydrothermal and solvothermal system
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DOI：
10.1016/j.ceramint.2009.09.044
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发表时间：
2010-04-01
影响因子：
5.2
通讯作者：
Lu, Shih-Fu
中科院分区：
文献类型：
--
作者：
Liang, Ming-Tsai;Wang, Shih-Han;Lu, Shih-Fu
研究了连续水热和溶剂热反应合成氧化铁。在水热合成中，在250-420 ℃和30 MPa下获得细α-Fe 2 O3（赤铁矿）颗粒。通过溶解和沉淀过程在亚临界水中生长α-Fe 2 O3晶体。超临界水中α-Fe_2 O_3 α晶体的生长受到抑制，这是由于水的溶剂力相当低。在溶剂热法制备过程中，当温度升高到超临界状态以上时，得到了晶态的Fe_3O_4。异丙醇（IPA）在提供还原性气氛的丙酮中被氧化。丙酮分子吸附到Fe 3 O 4颗粒表面抑制晶粒生长。(C)2009 Elsevier Ltd和Techna Group Sri。All rights reserved.
Iron oxide synthesis via a continuous hydrothermal and solvothermal reaction were studied. In the hydrothermal synthesis, fine alpha-Fe2O3 (hematite) particles were obtained at 250-420 degrees C and 30 MPa. The alpha-Fe2O3 crystals were grown in sub-critical water via a dissolution and precipitation process. The growth of alpha-Fe2O3 a crystals in supercritical water was suppressed due to the rather low solvent power of water. Crystalline Fe3O4 was obtained as the temperature was raised above the supercritical state in the solvotherrnal preparation. Isopropanol (IPA) was oxidized in acetone which provided a reducing atmosphere. Acetone molecule adsorption onto the Fe3O4 particle surface inhibited crystallite growth. (C) 2009 Elsevier Ltd and Techna Group Sri. All rights reserved.