Cobalt-iron oxide, alloy and nitride: Synthesis, characterization and application in catalytic peroxymonosulfate activation for orange II degradation

Kaixin Zhu, Changzi Jin, Z. Klencsár, Ayyakannu Sundaram Ganeshraja, Junhu Wang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In meeting the need for environmental remediation in wastewater treatment and the development of popular sulfate-radical-based advanced oxidation processes (SR-AOPs), a series of Co/Fe-based catalysts with confirmed phase structure were prepared through extended soft chemical solution processes followed by atmosphere-dependent calcination. Powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and57Fe Mössbauer spectroscopy were employed to characterize the composition, morphology, crystal structure and chemical state of the prepared catalysts. It was shown that calcination in air, nitrogen and ammonia atmospheres generated Co-Fe catalysts with cobalt ferrite (CoFe2O4), Co-Fe alloy and Co-Fe nitride as dominant phases, respectively. The prepared Co/Fe-based catalysts were demonstrated to be highly efficient in activating peroxymonosulfate (PMS) for organic Orange II degradation. The activation efficiency of the different catalysts was found to increase in the order CoFe2O4 < Co-Fe nitride < Co-Fe alloy. Sulfate radical was found to be the primary active intermediate species contributing to the dye degradation for all the participating catalysts. Furthermore, a possible reaction mechanism was proposed for each of the studied catalysts. This study achieves progress in efficient cobalt-iron catalysts using in the field of SR-AOPs, with potential applications in environment remediation.

Original languageEnglish
Article number138
JournalCatalysts
Volume7
Issue number5
DOIs
Publication statusPublished - May 1 2017

Fingerprint

cobalt oxides
Cobalt
Iron oxides
iron oxides
Nitrides
nitrides
Chemical activation
activation
degradation
catalysts
Degradation
Catalysts
synthesis
sulfates
Calcination
roasting
cobalt
atmospheres
Oxidation
oxidation

Keywords

  • Advanced oxidation processes
  • Co-Fe catalysts
  • Peroxymonosulfate activation
  • Sulfate radical

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Cobalt-iron oxide, alloy and nitride : Synthesis, characterization and application in catalytic peroxymonosulfate activation for orange II degradation. / Zhu, Kaixin; Jin, Changzi; Klencsár, Z.; Ganeshraja, Ayyakannu Sundaram; Wang, Junhu.

In: Catalysts, Vol. 7, No. 5, 138, 01.05.2017.

Research output: Contribution to journalArticle

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