Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
577254 | Journal of Hazardous Materials | 2013 | 9 Pages |
Abstract
A novel multifunctional microsphere with a large pore size mesoporous silica shell (ca. 10.3Â nm) and a magnetic core (Fe3O4) has been successfully synthesized via a facile two-step sol-gel method. In the synthesis process, CTAB was first dissolved in water to form spherical micelles, then added to the mixture in which Fe3O4@SiO2 was dispersed in ethanol, next dropping TEOS to form Fe3O4@SiO2@CTAB/SiO2 composites. This approach helps to form mesoporous silica shell with a large pore size, which is propitious to the modification of much more amino groups in order to enhance the adsorption capacity of heavy metal ions. The metal-loaded multifunctional microspheres can be easily removed from aqueous solution by magnetic separation and regenerated easily by acid treatment.
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Authors
Qing Yuan, Nan Li, Yue Chi, Wangchang Geng, Wenfu Yan, Ying Zhao, Xiaotian Li, Bin Dong,