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Magnetic Fe–Co crystal doped hierarchical porous carbon fibers for removal of organic pollutants

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Abstract

Porous carbonaceous materials are widely used as catalyst carriers to activate peroxymonosulfate (PMS) for catalytic oxidative degradation of organic pollutants. Herein, hierarchical structured ferro-cobalt alloyed crystals supported on nitrogen doped activated porous carbon fibers (FeCo2@APCFs) were prepared by a combination of multicomponent electrospinning, activation, and carbonization. Benefiting from the precursor design and activation process, the carbon fibers derived from a PAN/PBZ (polyacrylonitrile/polybenzoxazine) precursor exhibited a tunable porous structure with an ultrahigh specific surface area (SSA) and pore volume of 2085 m2 g−1 and 1.12 cm3 g−1, respectively. Most importantly, the FeCo2 crystals can be directly synthesized by carbonization at high temperature in a N2 flow with no other reducing gases. The as-prepared FeCo2@APCFs exhibited robust activation of PMS with reactive oxygen radicals (SO4˙, ˙OH, and 1O2) for ultrafast removal of organic pollutants, as well as good stability and recyclability with high total organic carbon (TOC) removal. The catalyst suspended in aqueous solution after catalysis can be easily separated with an external magnet without tedious separation processes. This study is meaningful for the development of novel catalyst carriers or a fascinating strategy for wastewater treatment.

Graphical abstract: Magnetic Fe–Co crystal doped hierarchical porous carbon fibers for removal of organic pollutants

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Publication details

The article was received on 09 May 2017, accepted on 03 Aug 2017 and first published on 03 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA03990E
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Magnetic Fe–Co crystal doped hierarchical porous carbon fibers for removal of organic pollutants

    Z. Zhu, C. Ji, L. Zhong, S. Liu, F. Cui, H. Sun and W. Wang, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA03990E

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