Magnetic recoverable MnFe2O4 and MnFe2O4-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants

Yao, Yunjin; Cai, Yunmu; Fang, Lu; Wei, Fengyu; Wang, Xiaoyao; Wang, Shaobin

doi:10.1016/j.jhazmat.2014.01.027

Cited by 439 publications

(127 citation statements)

References 53 publications

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“…Based on the appropriate regression coefficients for the reaction system, the pseudo-first-order kinetic was basically thought to fit well with the experiment. These catalysts yielded results that were similar to those of the previous studies [41,42], where the kinetic rate of organic pollutants was explored in the presence of PMS. The rate constant of CFN-600 was 46 times and 13.4 times higher than that of the CFA-600 and CFNH-600 samples, respectively, suggesting the excellent performance of the Co/Fe-based catalysts obtained under N 2 atmosphere.…”

Section: Catalytic Degradation Of Orange II Solutionssupporting

confidence: 81%

Cobalt-iron Oxide, Alloy and Nitride: Synthesis, Characterization and Application in Catalytic Peroxymonosulfate Activation for Orange II Degradation

et al. 2017

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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) and 57 Fe 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 (CoFe 2 O 4 ), 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 CoFe 2 O 4 < 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.

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Section: Catalytic Degradation Of Orange II Solutionssupporting

confidence: 81%

Cobalt-iron Oxide, Alloy and Nitride: Synthesis, Characterization and Application in Catalytic Peroxymonosulfate Activation for Orange II Degradation

et al. 2017

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“…Over 90% removal of dye compounds was obtained (Mahmoodi, 2013). MFN can also activate PMS, which is used to remove pollutants via SR-AOPs (Yao et al, 2014). In this removal process, adsorption is an important mechanism (Wang et al, 2011).…”

Section: Advanced Fe or Mn Compoundsmentioning

confidence: 99%

“…1), Mn can work as a catalyst in Fenton's reaction (Ma et al, 2004;Kouraichi et al, 2010;Yao et al, 2014). In Mn/H 2 O 2 system, both amorphous and crystalline Mn(IV) compounds are used as catalysts to remove carbon tetrachloride, with removal efficiencies of »90% at pH 6 (Watts et al, 2005).…”

Section: Other Promising Processesmentioning

confidence: 99%

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

Liu

Sutton

Rijnaarts

et al. 2016

Critical Reviews in Environmental Science and Technology

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Pharmaceuticals are detected at trace levels in waters. Their adverse effects on aquatic ecosystems and human health demand novel pharmaceutical removal technologies for treating wastewater effluents. Iron (Fe) or manganese (Mn) may play important roles in these new technologies since these metals are abundantly available at low costs and are known to contribute to organic conversions via physico-chemical, chemical, and biologically related processes. Few reviews describe and discuss Fe-or Mn-based technologies for the purpose to remove pharmaceuticals from water. Therefore, we review the current literature sorted into the three removal mechanisms, that is., through physico-chemical, chemical, and biological processes. The principals, performance, and influential parameters of these three types of technologies are described. Current and potential applications of these technologies are critically evaluated in order to identify advantages and challenges. In addition, the Fe-or Mn-based technologies which are currently not used but promising to further develop to remove pharmaceuticals cost efficiently are proposed.

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“…Yao et al (2014) successfully embedded MnFe 2 O 4 nanoparticles onto reduced graphene oxide and found that the obtained hybrid nanomaterials presented improved catalytic activity in PMS solution. Xu et al (2015) also observed the substantially enhanced catalytic performance when used magnetic CoFe 2 O 4 /graphene nanocomposites as heterogeneous catalyst and the optimum graphene content was found to be 22%.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic CoFe2O4/ordered mesoporous carbon nanocomposites and application in Fenton-like oxidation of rhodamine B

Deng

Chen

Lü

et al. 2017

Environ Sci Pollut Res

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CoFeO/ordered mesoporous carbon (OMC) nanocomposites were synthesized and tested as heterogeneous peroxymonosulfate (PMS) activator for the removal of rhodamine B. Characterization confirmed that CoFeO nanoparticles were tightly bonded to OMC, and the hybrid catalyst possessed high surface area, pore volume, and superparamagnetism. Oxidation experiments demonstrated that CoFeO/OMC nanocomposites displayed favorable catalytic activity in PMS solution and rhodamine B degradation could be well described by pseudo-first-order kinetic model. Sulfate radicals (SO·) were verified as the primary reactive species which was responsible for the decomposition of rhodamine B. The optimum loading ratio of CoFeO and OMC was determined to be 5:1. Under optimum operational condition (catalyst dosage 0.05 g/L, PMS concentration 1.5 mM, pH 7.0, and 25 °C), CoFeO/OMC-activated peroxymonosulfate system could achieve almost complete decolorization of 100 mg/L rhodamine B within 60 min. The enhanced catalytic activity of CoFeO/OMC nanocomposites compared to that of CoFeO nanoparticles could be attributable to the increased adsorption capacity and accelerated redox cycles between Co(III)/Co(II) and Fe(III)/Fe(II).

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Magnetic recoverable MnFe2O4 and MnFe2O4-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants

Cited by 439 publications

References 53 publications

Cobalt-iron Oxide, Alloy and Nitride: Synthesis, Characterization and Application in Catalytic Peroxymonosulfate Activation for Orange II Degradation

Cobalt-iron Oxide, Alloy and Nitride: Synthesis, Characterization and Application in Catalytic Peroxymonosulfate Activation for Orange II Degradation

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

Synthesis of magnetic CoFe2O4/ordered mesoporous carbon nanocomposites and application in Fenton-like oxidation of rhodamine B

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