Oxidizing capacity of periodate activated with iron-based bimetallic nanoparticles

Hongshin Lee, Ha Young Yoo, Jihyun Choi, In Hyun Nam, Sanghyup Lee, Seunghak Lee, Jae Hong Kim, Changha Lee, Jaesang Lee

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)


Nanosized zerovalent iron (nFe0) loaded with a secondary metal such as Ni or Cu on its surface was demonstrated to effectively activate periodate (IO4-) and degrade selected organic compounds at neutral pH. The degradation was accompanied by a stoichiometric conversion of IO4- to iodate (IO3-). nFe 0 without bimetallic loading led to similar IO4 - reduction but no organic degradation, suggesting the production of reactive iodine intermediate only when IO4- is activated by bimetallic nFe0 (e.g., nFe0-Ni and nFe0-Cu). The organic degradation kinetics in the nFe0-Ni(or Cu)/IO 4- system was substrate dependent: 4-chlorophenol, phenol, and bisphenol A were effectively degraded, whereas little or no degradation was observed with benzoic acid, carbamazepine, and 2,4,6-trichlorophenol. The substrate specificity, further confirmed by little kinetic inhibition with background organic matter, implies the selective nature of oxidant in the nFe0-Ni(or Cu)/IO4- system. The comparison with the photoactivated IO4- system, in which iodyl radical (IO3) is a predominant oxidant in the presence of methanol, suggests IO3 also as primary oxidant in the nFe0-Ni(or Cu)/IO4- system.

Original languageEnglish
Pages (from-to)8086-8093
Number of pages8
JournalEnvironmental Science and Technology
Issue number14
Publication statusPublished - 2014 Jul 15

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry


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