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One-Pot Synthesis of Magnetic Graphene Nanocomposites Decorated with Core@Double-shell Nanoparticles for Fast Chromium Removal
Abstract
A facile thermodecomposition process to synthesize magnetic graphene nanocomposites (MGNCs) is reported. High-resolution transmission electron microscopy and energy filtered elemental mapping revealed a core@double-shell structure of the nanoparticles with crystalline iron as the core, iron oxide as the inner shell and amorphous Si-S-O compound as the outer shell. The MGNCs demonstrate an extremely fast Cr(VI) removal from the wastewater with a high removal efficiency and with an almost complete removal of Cr(VI) within 5 min. The adsorption kinetics follows the pseudo-second-order model and the novel MGNC adsorbent exhibits better Cr(VI) removal efficiency in solutions with low pH. The large saturation magnetization (96.3 emu/g) of the synthesized nanoparticles allows fast separation of the MGNCs from liquid suspension. By using a permanent magnet, the recycling process of both the MGNC adsorbents and the adsorbed Cr(VI) is more energetically and economically sustainable. The significantly reduced treatment time required to remove the Cr(VI) and the applicability in treating the solutions with low pH make MGNCs promising for the efficient removal of heavy metals from the wastewater.
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Citations
Cites
Nanoscale iron particles for environmental remediation: An overview
Zhang, W.-X. (2003) · Journal of Nanoparticle Research · doi:10.1023/a:1025520116015 · Cited by 2,003
Cited by
Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications
Khan, M., Tahir, M. N., Adil, S. F., Khan, H. U., Siddiqui, M. R. H., Al-warthan, A. A., & Tremel, W. (2015) · Journal of Materials Chemistry A · doi:10.1039/c5ta02240a · Cited by 709
Reddy, D. H. K., & Lee, S.-M. (2013) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2013.10.002 · Cited by 689
Ying, Y., Liu, Y., Wang, X., Mao, Y., Cao, W., Hu, P., & Peng, X. (2015) · ACS Applied Materials & Interfaces · doi:10.1021/am5074722 · Cited by 658
Dubey, R., Bajpai, J., & Bajpai, A. K. (2015) · Journal of Water Process Engineering · doi:10.1016/j.jwpe.2015.01.004 · Cited by 149
Metadata
- Authors
- Zhu, J., Wei, S., Gu, H., Rapole, S. B., Wang, Q., Luo, Z., Haldolaarachchige, N., Young, D. P., & Guo, Z.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-12-15
- Volume
- 46
- Issue
- 2
- Pages
- 977-985
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1991190346
- Cited by
- 508
- References
- 1
- FWCI
- 37.57
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zhu, J., Wei, S., Gu, H., Rapole, S. B., Wang, Q., Luo, Z., Haldolaarachchige, N., Young, D. P., & Guo, Z. (2012). One-Pot Synthesis of Magnetic Graphene Nanocomposites Decorated with Core@Double-shell Nanoparticles for Fast Chromium Removal. Environmental Science & Technology. https://doi.org/10.1021/es2014133
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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