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Issue 2, 2016
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Nanoporous networks as effective stabilisation matrices for nanoscale zero-valent iron and groundwater pollutant removal

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Abstract

Nanoscale zero-valent iron (nZVI), with its reductive potentials and wide availability, offers degradative remediation of environmental contaminants. Rapid aggregation and deactivation hinder its application in real-life conditions. Here, we show that by caging nZVI into the micropores of porous networks, in particular Covalent Organic Polymers (COPs), we dramatically improved its stability and adsorption capacity, while still maintaining its reactivity. We probed the nZVI activity by monitoring azo bond reduction and Fenton type degradation of the naphthol blue black azo dye. We found that depending on the wettability of the host COP, the adsorption kinetics and dye degradation capacities changed. The hierarchical porous network of the COP structures enhanced the transport by temporarily holding azo dyes giving enough time and contact for the nZVI to act to break them. nZVI was also found to be more protected from the oxidative conditions since access is gated by the pore openings of COPs.

Graphical abstract: Nanoporous networks as effective stabilisation matrices for nanoscale zero-valent iron and groundwater pollutant removal

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Publication details

The article was received on 05 Jul 2015, accepted on 25 Nov 2015 and first published on 27 Nov 2015


Article type: Paper
DOI: 10.1039/C5TA05025A
Citation: J. Mater. Chem. A, 2016,4, 632-639
  • Open access: Creative Commons BY-NC license
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    Nanoporous networks as effective stabilisation matrices for nanoscale zero-valent iron and groundwater pollutant removal

    P. D. Mines, J. Byun, Y. Hwang, H. A. Patel, H. R. Andersen and C. T. Yavuz, J. Mater. Chem. A, 2016, 4, 632
    DOI: 10.1039/C5TA05025A

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