Shape-Control and Characterization of Magnetite Prepared via a One-Step Solvothermal Route

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• 作者：Xuzhen Wang ; Zongbin Zhao ; Jiangying Qu ; Zhiyu Wang ; Jieshan Qiu
• 刊名：Crystal Growth & Design
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：10
• 期：7
• 页码：2863-2869
• 全文大小：872K
• 年卷期：v.10,no.7(July 7, 2010)
• ISSN：1528-7505

文摘

This work presents an efficient method to synthesize micrometer-sized magnetite with different morphology and size through a solvothermal approach by using ferrocene as a single precursor and isopropanol or an isopropanol−water mixture as solvent. Sodium dodecylbenzenesulfonate (SDBS) was selected as additive to modify the crystallization of magnetite. The morphologies of the as-prepared Fe₃O₄ particles could be tailored by adjusting the content of water and/or SDBS in the synthesis process. Well-defined Fe₃O₄ crystals with star-shaped hexapods (about 2−5 μm in length of opposite vertexes), octahedrons (1−2 μm across), concave octahedrons (2−3 μm), and octahedral frameworks (2−5 μm) have been successfully fabricated after 6 h of aging at 350−400 °C. A possible growth mechanism was proposed for the formation of these Fe₃O₄ microstructures. It has been found that these microsized magnetites exhibit different ferromagnetic properties depending on their size and shape. The results demonstrate clearly that isopropanol solvothermal synthesis of magnetite in the presence of water and surfactant is a versatile approach to Fe₃O₄ crystal morphogenesis.