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Magnetic recoverable MnFe₂O₄ and MnFe₂O₄-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants.
J Hazard Mater. 2014 Apr 15; 270:61-70.JH

Abstract

Magnetic iron based materials are generally effective for many catalytic reactions and can be magnetically recovered after application, showing advantages than other metal oxides. In the present work, magnetic MnFe2O4 nanoparticle and MnFe2O4-reduced graphene oxide (rGO) hybrid were prepared and used as catalysts to activate peroxymonosulfate (PMS) to oxidatively degrade various organic pollutants in water. From a process of chemical deposition and reduction, MnFe2O4-rGO hybrids were produced with nanosized MnFe2O4 particles (ca. 13.2 nm). It was found that MnFe2O4 or MnFe2O4-rGO presented high activity in activating PMS to produce sulfate radicals for degradation of organic dyes (Methyl violet, Methyl orange, Methylene blue, Orange II and Rhodamine B) and could be separated with a magnet without any loss. The reaction kinetics, effect of different ion species CL(-),HCO3(-),CH3COO(-)and NO3(-) and Cl(-) strength, reaction temperature (25-65°C), catalytic stability, as well as degradation mechanism were comprehensively studied. The lower activation energy on MnFe2O4-rGO (25.7 kJ/mol) justify the higher chemical performance than that of MnFe2O4 (31.7 kJ/mol), suggesting that graphene plays a significant role in the enhanced degradation of dyes. More importantly, the as-prepared MnFe2O4 and MnFe2O4-rGO hybrid exhibited stable performance to remove the organic pollutants in wastewater with easy recycling and good stability by successive degradation experiments.

Authors+Show Affiliations

Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China. Electronic address: yaoyunjin@gmail.com.Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China.Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China.Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China.Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China.Department of Chemical Engineering, Curtin University, G.P.O. Box U1987, Perth 6845, WA, Australia. Electronic address: shaobin.wang@curtin.edu.au.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24548886

Citation

Yao, Yunjin, et al. "Magnetic Recoverable MnFe₂O₄ and MnFe₂O₄-graphene Hybrid as Heterogeneous Catalysts of Peroxymonosulfate Activation for Efficient Degradation of Aqueous Organic Pollutants." Journal of Hazardous Materials, vol. 270, 2014, pp. 61-70.
Yao Y, Cai Y, Lu F, et al. Magnetic recoverable MnFe₂O₄ and MnFe₂O₄-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants. J Hazard Mater. 2014;270:61-70.
Yao, Y., Cai, Y., Lu, F., Wei, F., Wang, X., & Wang, S. (2014). Magnetic recoverable MnFe₂O₄ and MnFe₂O₄-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants. Journal of Hazardous Materials, 270, 61-70. https://doi.org/10.1016/j.jhazmat.2014.01.027
Yao Y, et al. Magnetic Recoverable MnFe₂O₄ and MnFe₂O₄-graphene Hybrid as Heterogeneous Catalysts of Peroxymonosulfate Activation for Efficient Degradation of Aqueous Organic Pollutants. J Hazard Mater. 2014 Apr 15;270:61-70. PubMed PMID: 24548886.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Magnetic recoverable MnFe₂O₄ and MnFe₂O₄-graphene hybrid as heterogeneous catalysts of peroxymonosulfate activation for efficient degradation of aqueous organic pollutants. AU - Yao,Yunjin, AU - Cai,Yunmu, AU - Lu,Fang, AU - Wei,Fengyu, AU - Wang,Xiaoyao, AU - Wang,Shaobin, Y1 - 2014/01/24/ PY - 2013/09/16/received PY - 2014/01/05/revised PY - 2014/01/12/accepted PY - 2014/2/20/entrez PY - 2014/2/20/pubmed PY - 2014/11/14/medline KW - Graphene KW - MnFe2O4 KW - Organic pollutant KW - Peroxymonosulfate KW - Sulfate radical SP - 61 EP - 70 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 270 N2 - Magnetic iron based materials are generally effective for many catalytic reactions and can be magnetically recovered after application, showing advantages than other metal oxides. In the present work, magnetic MnFe2O4 nanoparticle and MnFe2O4-reduced graphene oxide (rGO) hybrid were prepared and used as catalysts to activate peroxymonosulfate (PMS) to oxidatively degrade various organic pollutants in water. From a process of chemical deposition and reduction, MnFe2O4-rGO hybrids were produced with nanosized MnFe2O4 particles (ca. 13.2 nm). It was found that MnFe2O4 or MnFe2O4-rGO presented high activity in activating PMS to produce sulfate radicals for degradation of organic dyes (Methyl violet, Methyl orange, Methylene blue, Orange II and Rhodamine B) and could be separated with a magnet without any loss. The reaction kinetics, effect of different ion species CL(-),HCO3(-),CH3COO(-)and NO3(-) and Cl(-) strength, reaction temperature (25-65°C), catalytic stability, as well as degradation mechanism were comprehensively studied. The lower activation energy on MnFe2O4-rGO (25.7 kJ/mol) justify the higher chemical performance than that of MnFe2O4 (31.7 kJ/mol), suggesting that graphene plays a significant role in the enhanced degradation of dyes. More importantly, the as-prepared MnFe2O4 and MnFe2O4-rGO hybrid exhibited stable performance to remove the organic pollutants in wastewater with easy recycling and good stability by successive degradation experiments. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/24548886/Magnetic_recoverable_MnFe₂O₄_and_MnFe₂O₄_graphene_hybrid_as_heterogeneous_catalysts_of_peroxymonosulfate_activation_for_efficient_degradation_of_aqueous_organic_pollutants_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(14)00041-7 DB - PRIME DP - Unbound Medicine ER -