Ferromagnetic multiporous silica gel microsphere and its preparation method
A ferromagnetic porous silica gel microsphere with 100-450 sq.m/g is composed of microspheric SiO2 particles as basic material and superparamagnetic Fe2O3 nanoparticles dispersed in said basic material. Its preparing process includes preparing Fe2O3 sol, preparing Fe2O3/SiO2 sol, preparing composite...
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Zusammenfassung: | A ferromagnetic porous silica gel microsphere with 100-450 sq.m/g is composed of microspheric SiO2 particles as basic material and superparamagnetic Fe2O3 nanoparticles dispersed in said basic material. Its preparing process includes preparing Fe2O3 sol, preparing Fe2O3/SiO2 sol, preparing composite microspheres, and preparing magnetic porous silica gel.
本发明公开了一种铁磁性多孔硅胶微球及其制备方法。所述的微球是以比表面积为100-450m#+[2]/g,孔径在5-15nm,粒径在0.5-20μm,二氧化硅为基材的微球,在该基材中均匀分散着具超顺磁性的三氧化二铁纳米微粒所构成。其制备过程包括氧化铁溶胶的制备、氧化铁/二氧化硅混合溶胶的制备、有机/无机复合微球的制备、磁性多孔硅胶的制备。本发明的优点和效果在于:所制备的微球比表面积大,粒径均匀,表面富含羟基,可以通过表面化学修饰来增强吸附选择性,适于作为色谱固定相或者催化反应的载体。其制备方法过程简单,条件易控,易于实现工业化,在磁场控制的传递过程和分离方法中具有潜在的应用前景。 |
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