期刊
MATERIALS RESEARCH BULLETIN
卷 49, 期 -, 页码 279-284出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.08.063
关键词
multilayers; sol-gel chemistry; electron microscopy; magnetic properties; surface properties
资金
- National Natural Science Foundation of China [21076094, 20743005, 11274057, 21203179]
- 973 Program [2012CB626801]
- Science and Technology Project of Liaoning Province [2012222009]
- Fundamental Research Funds for the Central Universities [DC12010117]
- Program for Liaoning Excellent Talents in University [LJQ2012112]
An amino-functionalized magnetic mesoporous microsphere was fabricated by a colloidal chemical method and using cationic surfactants (CTAB) as structure-directing agents. The prepared nanocomposite microspheres were mesoporous and magnetizable, with a diameter of ca. 480 nm, a high surface area of 474 m(2)/g, a pore size of 2.1 nm, and a saturation magnetization of 36.0 emu/g. As an adsorbent, these multifunctional microspheres showed excellent adsorptive capability toward heavy metal ions (Pb2+, Cu2+, Cd2+) and the adsorption capacity was as high as 289.7 mg/g (1.40 mmol/g) for Pb2+, 196.5 mg/g (3.09 mmol/g) for Cu2+ and 154.2 mg/g (1.37 mmol/g) for Cd2+. The amino-functionalized magnetic mesoporous microsphere can be easily removed from solution by an external magnetic field and regenerated easily by acid treatment. These results suggest that this kind of nanocomposites is a potentially useful material for effectively adsorbing and removing the heavy metal ions in aqueous solution. (C) 2013 Elsevier Ltd. All rights reserved.
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