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Magnetically Responsive Materials based on Polymeric Ionic Liquids and Graphene Oxide for Water Clean-up

Hazell, Gavin
; 
Hinojosa-Navarro, Miguel
; 
McCoy, Thomas
; 
Tabor, Rico
; 
Eastoe, Julian
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Affiliation
University of Chester, University of Bristol, Monash University
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Publication Date
2015-11-14
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Natural Sciences
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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 (<9 mmol/L) favour flocculation, whereas higher concentrations (>20 mmol/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.
Citation
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, 464, 285-290.
Publisher
Elsevier
Journal
Journal of Colloid and Interface Science
Research Unit
URI
http://hdl.handle.net/10034/622044
DOI
10.1016/j.jcis.2015.11.029
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
0021-9797
EISSN
1095-7103
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https://www.sciencedirect.com/science/article/pii/S0021979715303398?via%3Dihub