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Studies of malachite green adsorption on covalently functionalized Fe3O4@SiO2–graphene oxides core–shell magnetic microspheres

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
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Abstract

This paper presents the synthesis of a novel core–shell covalently functionalized Fe3O4 coated SiO2 decorated graphene oxides (Fe3O4@SiO2–GO) adsorbent. The prepared Fe3O4@SiO2–GO was characterized by fourier transform infrared spectrum, X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS), and magnetic measurements. And the adsorption properties of the Fe3O4@SiO2–GO toward malachite green were systematically investigated. Various factors possibly affecting the adsorption behavior (initial concentration, contact time, and adsorbent dosage) were also studied in detail. The adsorption capacity (qm) of Fe3O4@SiO2–GO for malachite green was found to be 265.87 mg/g with best fit to Langmuir isotherm (R 2 = 0.968), and the adsorption mechanism follows the pseudo-second-order model (R 2 = 0.981). The results indicate that the Fe3O4@SiO2–GO adsorbent, which is easily separated via an external magnetic field, is a potential low-cost effective material for malachite green removal from contaminated water.

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Acknowledgements

This research was financially supported by the open fund of the National Science and Technology Pillar Program (2014BAL04B04),Pro. Kai Yang; Natural Science Foundation of Hubei Province, China (NO. 2013CFB289; 2013CFB308), Pro. Hong Yu Wang; and Major Science and Technology Program for Water Pollution Control and Treatment (NO. 2009ZX07317-008-003), Pro. Kai Yang.

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Authors and Affiliations

  1. School of Civil Engineering, Wuhan University, Wuhan, 430072, China

    Jing Zhang, Mao Liu, Zhijie Liu, Tao Yang, Qiulai He, Kai Yang & Hongyu Wang

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  1. Jing Zhang
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  2. Mao Liu
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  3. Zhijie Liu
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  4. Tao Yang
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  5. Qiulai He
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  6. Kai Yang
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  7. Hongyu Wang
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Correspondence to Hongyu Wang.

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Zhang, J., Liu, M., Liu, Z. et al. Studies of malachite green adsorption on covalently functionalized Fe3O4@SiO2–graphene oxides core–shell magnetic microspheres. J Sol-Gel Sci Technol 82, 424–431 (2017). https://doi.org/10.1007/s10971-017-4307-1

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  • DOI: https://doi.org/10.1007/s10971-017-4307-1

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