Removal and reuse of Ag nanoparticles by magnetic polyaniline/Fe3O4 nanofibers
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For the treatment of wastewater containing Ag nanoparticles (NPs), PANI/Fe3O4 nanofibers were firstly prepared by a novel self-assemble. And then, the efficiency for the removal of Ag NPs from wastewater was investigated. The magnetic performance of PANI/Fe3O4 nanofibers could be optimized by adjusting the pH of the self-assemblied system. Under pH of 3, the as-prepared nanofibers exhibited the highest magnetism and also displayed good efficiency (> 12 mg g−1) for the removal of Ag NPs. Importantly, the resulted product (PANI/Fe3O4/Ag composite) could act as a catalysis for cleaning durable pollutant, 4-nitrophenol. After 10 cycles, only slight decrease in rate constant was found, indicating excellent reusability. Those approaches provide a new way to merge the recovery of Ag NPs as pollutants and reuse of recovered Ag NPs as recyclable material for environmental remediation.
This study was funded by STRP of Anhui University of Technology (2016307986).
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Conflict of interest
The authors declare that they have no conflict of interest.
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