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Hazell G, Hinojosa-Navarro M, McCoy TM, et al. Responsive materials based on magnetic polyelectrolytes and graphene oxide for water clean-up. J Colloid Interface Sci. 2015;464:285-90doi: 10.1016/j.jcis.2015.11.029.
Hazell, G., Hinojosa-Navarro, M., McCoy, T. M., Tabor, R. F., & Eastoe, J. (2016). Responsive materials based on magnetic polyelectrolytes and graphene oxide for water clean-up. Journal of colloid and interface science, 464285-90. https://doi.org/10.1016/j.jcis.2015.11.029
Hazell, Gavin, et al. "Responsive materials based on magnetic polyelectrolytes and graphene oxide for water clean-up." Journal of colloid and interface science vol. 464 (2016): 285-90. doi: https://doi.org/10.1016/j.jcis.2015.11.029
Hazell G, Hinojosa-Navarro M, McCoy TM, Tabor RF, Eastoe J. Responsive materials based on magnetic polyelectrolytes and graphene oxide for water clean-up. J Colloid Interface Sci. 2016 Feb 15;464:285-90. doi: 10.1016/j.jcis.2015.11.029. Epub 2015 Nov 14. PMID: 26637974.
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J Colloid Interface Sci. 2016 Feb 15;464:285-90. doi: 10.1016/j.jcis.2015.11.029. Epub 2015 Nov 14.

Responsive materials based on magnetic polyelectrolytes and graphene oxide for water clean-up.

Journal of colloid and interface science

Gavin Hazell, Miguel Hinojosa-Navarro, Thomas M McCoy, Rico F Tabor, Julian Eastoe

Affiliations

  1. School of Chemistry, University of Bristol, Cantock's Close, Woodland Road, Bristol BS8 1TS, UK.
  2. School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
  3. School of Chemistry, University of Bristol, Cantock's Close, Woodland Road, Bristol BS8 1TS, UK. Electronic address: [email protected].

PMID: 26637974 DOI: 10.1016/j.jcis.2015.11.029

Abstract

HYPOTHESIS: Owing to attractive interactions between negatively charged graphene oxide (GO) and a paramagnetic cationic polyelectrolyte (polyallydimethylammonium chloride with a FeCl4(-) counterion (Fe-polyDADMAC) it should be possible to generate magnetic materials. The benefit of using charge-based adsorption is that the need to form covalently linked magnetic materials is offset, which is expected to significantly reduce the time, energy and cost to make such responsive materials. These systems could have a wide use and application in water treatment.

EXPERIMENTS: Non-covalent magnetic materials were formed through the mixing of Fe-pDADMAC and GO. A systematic study was conducted by varying polymer concentration at a fixed GO concentration. UV-Vis was used to confirm and quantify polymer adsorption onto GO sheets. The potential uses of the systems for water purification were demonstrated.

FINDINGS: Fe-polyDADMAC adsorbs to the surface of GO and induces flocculation. Low concentrations of the polymer (<9mmol/L) favour flocculation, whereas higher concentrations (>20mmol/L) induce restabilization. Difficult-to-recover gold nanoparticles can be separated from suspensions as well as the pollutant antibiotic tetracycline. Both harmful materials can be magnetically recovered from the dispersions. This system therefore has economical and practical applications in decontamination and water treatment.

Copyright © 2015 Elsevier Inc. All rights reserved.

Keywords: Adsorption; Graphene oxide; Magnetic nanomaterials; Magnetic polyelectrolyte; Water treatment

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