期刊
RSC ADVANCES
卷 7, 期 82, 页码 51993-52000出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra08937f
关键词
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资金
- Jilin Province Science & Technology Department Project [20150520020JH, 20160519020JH, 20170520122JH]
- National Natural Science Foundation of China [51608050, 51601018, 51671035]
- Education Department of Jilin Province [2016327]
In this work, we report the fabrication of novel multifunctional microspheres which are composed of ordered mesoporous silica shells with accessible carboxyl functionalized surfaces and radially oriented large mesopores, and nonporous silica-coated magnetite cores (Fe3O4), aiming to remove heavy metal ions from aqueous media. The well-designed multifunctional microspheres were thoroughly characterized with transmission electron microscopy, scanning electron microscopy, infrared spectroscopy, N-2 adsorption-desorption, X-ray diffraction as well as magnetization measurements. The as-prepared microspheres possess unique properties including stably grafted and accessible carboxyl groups, highly open mesopores (11.03 nm), high magnetization (34.5 emu g(-1)), and large BET surface areas (165 m(2) g(-1)), and as a result, the as-prepared microspheres exhibit an enhanced performance for the removal of Cd(II), Cu(II), and Pb(II) from wastewater, with a high adsorption capacity, a rapid adsorption rate, and an easy magnetically separable process.
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