A simple method for preparation of superparamagnetic porous silica
A simple method for preparation of superparamagnetic porous silica
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DOI：
10.1016/j.jallcom.2009.12.114
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发表时间：
2010-03
影响因子：
6.2
通讯作者：
Chao Wang;Y. Ao;Peifang Wang;J. Qian;J. Hou;Songhe Zhang
中科院分区：
文献类型：
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作者：
Chao Wang;Y. Ao;Peifang Wang;J. Qian;J. Hou;Songhe Zhang
介绍了一种制备具有超顺磁性的多孔二氧化硅的简便方法。制备的复合二氧化硅介孔被磁性纳米颗粒分散。采用XRD、TEM、BET和振动样品磁强计（VSM）对制备的样品进行了表征。结果表明，该磁性复合材料具有比表面积大（377.4m2/g）、孔体积大（0.65cm3/g）、孔径大（7.05nm）等特点。此外，它还表现出另一个优点（可回收性），因为它可以通过外部磁场进行磁分离。在制备过程中，通过改变不同前驱体的比例，可以很容易地合成磁性能可调的多孔二氧化硅。因此，该复合材料将是催化载体的良好选择。
A simple method was described for the preparation of porous silica with superparamagnetic properties. The mesopores of as-prepared composite silica were dispersed with magnetic nanoparticles. The prepared samples were characterized by XRD, TEM, BET and vibrating sample magnetometry (VSM). Results showed that such magnetic composite material exhibited large surface areas (377.4m2/g), high pore volumes (0.65cm3/g) and large pore size (7.05nm). Furthermore, it exhibited another advantage (recyclability) because it can be magnetically separated by an external magnetic field. In the preparation, it was easily to synthesize porous silica with tunable magnetic properties by changing the ratio of the different precursors. Therefore, the composite would be a good choice for catalytic supports.