| 纳米磁性Fe_3O_4-SiO_2复合材料的制备和表征 |
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| 引用本文： | 刘海弟,赵璇,陈运法.纳米磁性Fe_3O_4-SiO_2复合材料的制备和表征[J].化学研究,2007,18(2):21-23,31. |
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| 作者姓名： | 刘海弟 赵璇 陈运法 |
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| 作者单位： | 1. 清华大学,核能与新能源研究院601室,北京,100084
2. 中国科学院过程工程研究所,多相反应重点实验室,北京,100080 |
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| 基金项目： | 中国博士后基金资助项目(20060400437) |
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| 摘 要： | 向硅酸四乙酯凝胶体系中加入纳米磁性Fe3O4,得到了Fe3O4-SiO2复合材料,利用BET方法测定了其比表面积和孔分布,用TEM分析观察了其粒子形貌,并测定了复合材料的饱和磁强度曲线,研究表明:这种材料的饱和磁强度较纳米Fe3O4有所下降,而比表面积和孔容明显增大.
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| 关 键 词： | 超顺磁性 纳米Fe3O4 二氧化硅 高比表面 |
| 文章编号： | 1008-1011（2007）02-0021-03 |
| 修稿时间： | 2007-03-02 |
Preparation and Characterization of Nano-magnetic Fe3O4-SiO2 Composite |
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| LIU Hai-di,ZHAO Xuan,CHEN Yun-fa.Preparation and Characterization of Nano-magnetic Fe3O4-SiO2 Composite[J].Chemical Research,2007,18(2):21-23,31. |
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| Authors: | LIU Hai-di ZHAO Xuan CHEN Yun-fa |
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| Institution: | 1. 601 Department of Institute of Nuclear and New Energy and Technology, Tsinghua University, Beijing 100084, China; 2. Multi -phase Reaction Engineering Laboratory of The Institute of Process Engineering, Chinese Academy of Sciences, Bering 100080, China |
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| Abstract: | Fe3O4-SiO2 composite was prepared by dispersing nano-magnetic Fe3O4 particles into the TEOS gelation system. BET nitrogen adsorption analysis was conducted to investigate the surface area and pore-size distribution of the as-made samples. The particle morphology was observed with transmission electron microscope (TEM) and the magnetization curve of the samples was also obtained. Results indicated that the as-synthesized composite showed lower magnetic saturation but larger BET surface area and bigger pore volume. |
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| Keywords: | superparamagnetism nano-Fe3O4 silica high surface area |
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