Static magnetic field-assisted synthesis of Fe3O4 nanoparticles and their adsorption of Mn(II) in aqueous solution

doi:10.1016/j.cjche.2016.05.034

›› 2017, Vol. 25 ›› Issue (1): 32-36.DOI: 10.1016/j.cjche.2016.05.034

• Separation Science and Engineering • Previous Articles Next Articles

Static magnetic field-assisted synthesis of Fe₃O₄ nanoparticles and their adsorption of Mn(II) in aqueous solution

Yong Liu^1,2, Jianfei Bai^1,2, Hongtao Duan^1,2, Xiaohong Yin^1,2

1 College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China;
2 Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin University of Technology, Tianjin 300384, China

Received:2016-03-12 Revised:2016-05-26 Online:2017-02-15 Published:2017-01-28
Supported by:
Supported by the National Natural Science Foundation of China (No. 41201487) and the Natural Science Foundation of Hebei Province (No. 2014202074).

Static magnetic field-assisted synthesis of Fe₃O₄ nanoparticles and their adsorption of Mn(II) in aqueous solution

Yong Liu^1,2, Jianfei Bai^1,2, Hongtao Duan^1,2, Xiaohong Yin^1,2

1 College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China;
2 Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin University of Technology, Tianjin 300384, China

通讯作者: Yong Liu,E-mail address:tjutliuyong@163.com
基金资助:
Supported by the National Natural Science Foundation of China (No. 41201487) and the Natural Science Foundation of Hebei Province (No. 2014202074).

Abstract

Abstract: A facile method for synthesis of the magnetic Fe₃O₄ nanoparticles was introduced. Magnetic nanoparticles were prepared via co-precipitation method with (PMF) and without (AMF) 0.15 T static magnetic field. The effects of magnetic field on the properties of magnetic nanoparticles were studied by XRD, TEM, SEM, VSM and BET. The results showed that the magnetic field in the co-precipitation reaction process did not result in the phase change of the Fe₃O₄ nanoparticles but improved the crystallinity. The morphology of Fe₃O₄ nanoparticles was varied from random spherical particles to rod-like cluster structure. The VSM results indicated that the saturation magnetization value of the Fe₃O₄ nanoparticles was significantly improved by the magnetic field. The BET of Fe₃O₄ nanoparticles prepared with the magnetic field was larger than the control by 23.5%. The batch adsorption experiments of Mn(II) on the PMF and AMF Fe₃O₄ nanoparticles showed that the Mn(II) equilibrium capacity was increased with the pH value increased. At pH 8, the Mn(II) adsorption capacity for the PMF and AMF Fe₃O₄ was reached at 36.81 and 28.36 mg·g^-1, respectively. The pseudo-second-order model fitted better the kinetic models and the Freundlich model fitted isotherm model well for both PMF and AMF Fe₃O₄. The results suggested that magnetic nanoparticles prepared by the magnetic field presented a fairly good potential as an adsorbent for an efficient removal of Mn(II) from aqueous solution.

Key words: Magnetic field, Fe₃O₄ nanoparticles, Mn(II), Adsorption

摘要： A facile method for synthesis of the magnetic Fe₃O₄ nanoparticles was introduced. Magnetic nanoparticles were prepared via co-precipitation method with (PMF) and without (AMF) 0.15 T static magnetic field. The effects of magnetic field on the properties of magnetic nanoparticles were studied by XRD, TEM, SEM, VSM and BET. The results showed that the magnetic field in the co-precipitation reaction process did not result in the phase change of the Fe₃O₄ nanoparticles but improved the crystallinity. The morphology of Fe₃O₄ nanoparticles was varied from random spherical particles to rod-like cluster structure. The VSM results indicated that the saturation magnetization value of the Fe₃O₄ nanoparticles was significantly improved by the magnetic field. The BET of Fe₃O₄ nanoparticles prepared with the magnetic field was larger than the control by 23.5%. The batch adsorption experiments of Mn(II) on the PMF and AMF Fe₃O₄ nanoparticles showed that the Mn(II) equilibrium capacity was increased with the pH value increased. At pH 8, the Mn(II) adsorption capacity for the PMF and AMF Fe₃O₄ was reached at 36.81 and 28.36 mg·g^-1, respectively. The pseudo-second-order model fitted better the kinetic models and the Freundlich model fitted isotherm model well for both PMF and AMF Fe₃O₄. The results suggested that magnetic nanoparticles prepared by the magnetic field presented a fairly good potential as an adsorbent for an efficient removal of Mn(II) from aqueous solution.

关键词: Magnetic field, Fe₃O₄ nanoparticles, Mn(II), Adsorption

Yong Liu, Jianfei Bai, Hongtao Duan, Xiaohong Yin. Static magnetic field-assisted synthesis of Fe₃O₄ nanoparticles and their adsorption of Mn(II) in aqueous solution[J]. , 2017, 25(1): 32-36.

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Static magnetic field-assisted synthesis of Fe₃O₄ nanoparticles and their adsorption of Mn(II) in aqueous solution

Static magnetic field-assisted synthesis of Fe₃O₄ nanoparticles and their adsorption of Mn(II) in aqueous solution

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