3 years ago

In situ carbothermal synthesis of nZVI functionalized porous carbon from Fe-MOFs for efficient detoxification of Cr(VI)

Yongsheng Li, Zhe Wang, Jinlou Gu, Jian Yang, Qixin Zhuang
Owing to the high toxicity of Cr(VI) species to human health and ecosystem, much attention has been paid to the development of efficient adsorbents for Cr(VI). Herein, MIL-100(Fe) was successfully utilized as a novel precursor for carbothermal reduction synthesis of nZVI@C for the effective removal of Cr(VI). The organic ligands in MIL-100(Fe) were transformed to porous carbon matrix, while Fe-O metal clusters were in-situ reduced to nZVIs thanks to the strong reducibility of pyrolytic carbon. Additionally, nZVIs were uniformly distributed in the carbon support with high-loading and controllable particle size. Highly toxic Cr(VI) was efficiently degraded into less toxic Cr(III) by the reductive sites of nZVI, followed by Cr(III) species precipitate as (CrxFe1-x)(OH)3 in the porous hybrids. The adsorption capacity of the developed nZVI@C could reach 206 mg g-1 for Cr(VI) under optimal conditions. Furthermore, the excellent magnetic performance makes it convenient for Cr(VI) remediation via simple magnetic separation. These outstanding characteristics prefigured the promising potential of the developed material as novel adsorbents for the efficient removal of Cr(VI) from industrial wastewater.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201701089

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