期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 7, 页码 7324-7337出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b00471
关键词
One-pot sequential synthesis method; Magnetic Fe3O4; Aminopyridine; Adsorption selectivity; Mechanism
资金
- National Natural Science Foundation of China [21307053, 51673090]
- Natural Science Foundation of Shandong Province [ZR2018MB039]
- Science and Technology Research Program of Yantai [2017ZH060]
- Key Program for Basic Research of Natural Science Foundation of Shandong Province [ZR2018ZC0946]
Heavy metal pollution to aqueous media is an important issue for environmental sustainability. A simple strategy for the synthesis of an efficient adsorbent is strongly desired for water remediation. Herein, aminopyridine functionalized magnetic Fe3O4 (HO-Fe3O4@ SiO2-AP) with excellent adsorption capacity and selectivity was synthesized by a feasible one-pot sequential reaction. As a comparison, the same adsorbent was also prepared by the general step-by-step surface modification method. The structure characterization and adsorption performance prove the efficiency of this strategy. The factors that affect the adsorption were determined. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Density Functional Theory calculation were used to demonstrate the adsorption mechanism. As HO-Fe3O4@SiO2-AP exhibits competitive adsorption capacity and excellent adsorption selectivity, it can be used potentially for robust removal, preconcentration, and recovery of aqueous Hg(II) and Ag(I).
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