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A facile chemical method to produce superparamagnetic graphene oxide–Fe3O4hybrid composite and its application in the removal of dyes from aqueous solution
Open accessAbstract
A superparamagnetic graphene oxide–Fe3O4 hybrid composite (GO–Fe3O4) was prepared via a simple and effective chemical method. Amino-functionalized Fe3O4 (NH2-Fe3O4) particles are firmly deposited on the graphene oxide sheets. The graphene oxide sheets could prevent NH2-Fe3O4 particles from agglomeration and enable a good dispersion of these oxide particles. The as-prepared GO–Fe3O4 hybrid composite had a much higher thermal stability than graphene oxide. The amount of NH2-Fe3O4 loaded on GO was estimated to be 23.6 wt% by atomic absorption spectrometry. The specific saturation magnetization (Ms) of the GO–Fe3O4 hybrid composite is 15 emu g−1. The magnetic GO–Fe3O4 composite has been employed as adsorbent for the magnetic separation of dye contaminants from water. The adsorption test of dyes (Methylene Blue (MB) and Neutral Red (NR)) demonstrates that it only takes 30 min for MB and 90 min for NR to attain equilibrium. The adsorption capacities for MB and NR in the concentration range studied are 167.2 and 171.3 mg g−1, respectively. The GO–Fe3O4 hybrid composite can be easily manipulated in magnetic field for desired separation, leading to the removal of dyes from polluted water. These GO–Fe3O4 hybrid composites have great potential applications in removing organic dyes from polluted water.
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Surface modification of magnetic iron oxide nanoparticles
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Metadata
- Authors
- Xie, G., Xi, P., Liu, H., Chen, F., Huang, L., Shi, Y., Hou, F., Zeng, Z., Shao, C., & Wang, J.
- Venue
- J. Mater. Chem.
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2012
- Volume
- 22
- Issue
- 3
- Pages
- 1033-1039
- ISSN
- 0959-9428 (ISSN-L)
- 1364-5501
- OpenAlex
- W1992791901
- Cited by
- 381
- References
- 58
- FWCI
- 24.33
- Type
- journal article
- Language
- en
- Open access
- green
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- Xie, G., Xi, P., Liu, H., Chen, F., Huang, L., Shi, Y., Hou, F., Zeng, Z., Shao, C., & Wang, J. (2012). A facile chemical method to produce superparamagnetic graphene oxide–Fe3O4hybrid composite and its application in the removal of dyes from aqueous solution. J. Mater. Chem. https://doi.org/10.1039/c1jm13433g
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