Direct synthesis of mesoporous Fe₃O₄ through citric acid-assisted solid thermal decomposition

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• 作者：Xiaohui Liu ; Yong Guo ; Yangang Wang ; Jiawen Ren ; Yanqin Wang ; Yanglong Guo ; Yun Guo ; Guanzhong Lu ; Yunsong Wang and Zhigang Zhang
• 刊名：Journal of Materials Science
• 出版年：2010
• 出版时间：February, 2010
• 年：2010
• 卷：45
• 期：4
• 页码：906-910
• 全文大小：467.5 KB

文摘

A simple and inexpensive approach to synthesizing mesoporous Fe₃O₄ is developed by using citric acid-assisted solid thermal decomposition of ferric nitrate. The structure and magnetic property of mesoporous Fe₃O₄ were characterized by XRD, FT–IR, N₂ adsorption–desorption isotherms, TEM, and vibrating sample magnetometer. It was shown that the decomposition of citric acid results in the formation of the mesoporous structure and narrow pore-size distribution. The reducing atmosphere which created by the decomposition of the ferric nitrate–citric acid complex caused the partial reduction of Fe(III) to Fe(II) and in turn the formation of Fe₃O₄. Moreover, the strength of the coordination between carboxyl group and Fe3+ also affected the phase composition of the iron oxides.