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Fe–Ni Nanoparticles supported on carbon nanotube-co-cyclodextrin polyurethanes for the removal of trichloroethylene in water

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Abstract

Nanoscale bimetallic particles of nickel on iron were supported on carbon nanotubes and then co-polymerized with β-cyclodextrin (CNTs/CD) and the resulting polymers applied to the degradation of pollutants in water. The bimetallic nanoparticles (BMNPs) were first embedded on functionalized carbon nanotubes (f-CNTs) before being copolymerized with beta cyclodextrin (β-CD) and hexamethylene diisocyanate (HMDI) forming a water-insoluble polyurethane. The particle size and distribution of BMNPs were determined by Transmission Electron Microscopy (TEM), and the surface area was determined by using the Brunauer–Emmett–Teller (BET) method. Energy dispersive X-ray spectroscopy (EDXS) was used to confirm the formation of the BMNPs. Degradation of trichloroethylene (TCE) as a model pollutant was studied and more than 98% reduction in TCE was achieved by the polymers. Polymers with the BMNPs maintained their efficiency in degrading TCE after several cycles compared to metal-free polymers. The degradation was monitored by using gas chromatography-mass spectrometry (GC-MS), while the production of chlorides was verified by using ion chromatography (IC). Atomic absorption spectroscopy (AAS) was employed to determine the possible leaching of the BMNPs from the polymer, and confirmed to be extremely low.

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Acknowledgments

Funding from the Department of Science and Technology’s Centre of Excellence in Strong Materials (DST CoESM), University of Johannesburg, and the National Research Foundation (NRF) is greatly appreciated.

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Authors and Affiliations

  1. Department of Chemical Technology, University of Johannesburg, Box 17011, Doornfontein, 2028, South Africa

    Rui W. M. Krause, Bhekie B. Mamba, Langelihle N. Dlamini & Shane H. Durbach

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  1. Rui W. M. Krause
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  2. Bhekie B. Mamba
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  3. Langelihle N. Dlamini
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  4. Shane H. Durbach
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Correspondence to Rui W. M. Krause.

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Krause, R.W.M., Mamba, B.B., Dlamini, L.N. et al. Fe–Ni Nanoparticles supported on carbon nanotube-co-cyclodextrin polyurethanes for the removal of trichloroethylene in water. J Nanopart Res 12, 449–456 (2010). https://doi.org/10.1007/s11051-009-9659-1

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