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Issue 76, 2016, Issue in Progress
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Preparation of amino-functionalized CoFe2O4@SiO2 magnetic nanocomposites for potential application in absorbing heavy metal ions

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Abstract

Amino-functionalized nanocomposites with a magnetic CoFe2O4 core and an amorphous SiO2 shell have been designed and synthesized. The core–shell structure was characterized by SEM, EDS, TEM, FTIR and XPS. CoFe2O4@SiO2–NH2 with a high saturated magnetization (28.09 emu g−1) can be easily separated under a moderate external magnetic field within one minute. In addition, the adsorption capacity of the CoFe2O4@SiO2–NH2 for Cu(II), Cd(II) and Mn(II) was 170.829, 144.948 and 110.803 mg g−1, respectively. The removal efficiency was increased from 12 to 85% with an increase in the pH from 4 to 6.5. The adsorbent can be recycled for at least four cycles with a feasible removal efficiency (85.41%). The adsorption process was fitted by pseudo-second-order kinetics and a Langmuir isotherm model. Based on the data of the present investigation, CoFe2O4@SiO2–NH2 could find potential applications in heavy metal ion wastewater treatment.

Graphical abstract: Preparation of amino-functionalized CoFe2O4@SiO2 magnetic nanocomposites for potential application in absorbing heavy metal ions

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Supplementary files

Article information


Submitted
23 May 2016
Accepted
25 Jul 2016
First published
01 Aug 2016

RSC Adv., 2016,6, 72479-72486
Article type
Paper

Preparation of amino-functionalized CoFe2O4@SiO2 magnetic nanocomposites for potential application in absorbing heavy metal ions

C. Ren, X. Ding, H. Fu, C. Meng, W. Li and H. Yang, RSC Adv., 2016, 6, 72479
DOI: 10.1039/C6RA13304E

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