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In situ Carbothermal Synthesis of Nanoscale Zero‐Valent Iron Functionalized Porous Carbon from Metal–Organic Frameworks for Efficient Detoxification of Chromium(VI)
Author(s) -
Wang Zhe,
Yang Jian,
Li Yongsheng,
Zhuang Qixin,
Gu Jinlou
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201701089
Subject(s) - zerovalent iron , chemistry , chromium , adsorption , carbon fibers , metal organic framework , carbothermic reaction , pyrolytic carbon , chemical engineering , porosity , environmental remediation , inorganic chemistry , pyrolysis , organic chemistry , materials science , phase (matter) , composite number , contamination , ecology , engineering , composite material , biology
Owing to the high toxicity of Cr VI species to human health and the ecosystem, much attention has been paid to the development of efficient adsorbents for Cr VI . Herein, MIL‐100(Fe) was successfully utilized as a precursor for the carbothermal reductive synthesis of nanoscale zero‐valent iron functionalized porous carbon (nZVI@C) for the effective removal of Cr VI . The organic ligands in MIL‐100(Fe) were transformed into a porous carbon matrix, whereas the Fe–O clusters were reduced in situ to nZVI owing to the strong reducibility of pyrolytic carbon. Additionally, the nZVI was distributed uniformly in the carbon support with a high loading and controllable particle size. Highly toxic Cr VI species were efficiently degraded into less toxic Cr III species at the nZVI reductive sites, and then the Cr III species precipitated as (Cr x Fe 1– x )(OH) 3 in the porous hybrids. The Cr VI adsorption capacity of the developed nZVI@C reached 206 mg g –1 under optimal conditions. Furthermore, the excellent magnetic performance of nZVI@C makes it convenient for Cr VI remediation through simple magnetic separation. These outstanding characteristics indicate the promising potential of the developed material as an adsorbent for the efficient removal of Cr VI from industrial wastewater.