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CuO-Co3O4@CeO2 as a heterogeneous catalyst for efficient degradation of 2,4-dichlorophenoxyacetic acid by peroxymonosulfate.
J Hazard Mater. 2020 01 05; 381:121209.JH

Abstract

CuO-Co3O4@CeO2 nanoparticles used as a heterogeneous catalyst were prepared via a sol-gel method and characterized by various techniques. For comparison, a series of oxides was investigated for activating peroxymonosulfate (PMS) during the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D). The results indicated that CuO-Co3O4@CeO2 exhibited the highest catalytic performance among the catalysts. Complete degradation of 2,4-D (20 mg/L) was realized within 45 min at 1 mM PMS, CuO-Co3O4@CeO2 loading of 0.07 g/L, and pH of 6. Recycling experiments confirmed that CuO-Co3O4@CeO2 was very stable, and the 2,4-D degradation efficiencies ranged from 100% to 97.5%, decreasing by only 2.5% after the fifth run. The outstanding catalysis of CuO-Co3O4@CeO2 resulted from the synergy of cerium, cobalt, and copper. Electron paramagnetic resonance and radical scavenger experiments confirmed the production of SO4• - and •OH radicals in the CuO-Co3O4@CeO2/PMS system, which were responsible for efficient decomposition of 2,4-D. Furthermore, the combination of CuO-Co3O4@CeO2 andPMS was applied to treat natural water containing 2,4-D, and a high 2,4-D removal rate was also achieved. Based on these results, it was deduced that CuO-Co3O4@CeO2 can be utilized as a catalyst to activate PMS and destroy organic contaminants in aqueous solution.

Authors+Show Affiliations

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China; Jiangsu Tobacco Industrial Limited Company, Nanjing, 210011, PR China.College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China. Electronic address: lanyq102@njau.edu.cn.College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China. Electronic address: Guojing@njau.edu.cn.

Pub Type(s)

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

Language

eng

PubMed ID

31563670

Citation

Li, Wei, et al. "CuO-Co3O4@CeO2 as a Heterogeneous Catalyst for Efficient Degradation of 2,4-dichlorophenoxyacetic Acid By Peroxymonosulfate." Journal of Hazardous Materials, vol. 381, 2020, p. 121209.
Li W, Li Y, Zhang D, et al. CuO-Co3O4@CeO2 as a heterogeneous catalyst for efficient degradation of 2,4-dichlorophenoxyacetic acid by peroxymonosulfate. J Hazard Mater. 2020;381:121209.
Li, W., Li, Y., Zhang, D., Lan, Y., & Guo, J. (2020). CuO-Co3O4@CeO2 as a heterogeneous catalyst for efficient degradation of 2,4-dichlorophenoxyacetic acid by peroxymonosulfate. Journal of Hazardous Materials, 381, 121209. https://doi.org/10.1016/j.jhazmat.2019.121209
Li W, et al. CuO-Co3O4@CeO2 as a Heterogeneous Catalyst for Efficient Degradation of 2,4-dichlorophenoxyacetic Acid By Peroxymonosulfate. J Hazard Mater. 2020 01 5;381:121209. PubMed PMID: 31563670.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - CuO-Co3O4@CeO2 as a heterogeneous catalyst for efficient degradation of 2,4-dichlorophenoxyacetic acid by peroxymonosulfate. AU - Li,Wei, AU - Li,Yuxin, AU - Zhang,Deyun, AU - Lan,Yeqing, AU - Guo,Jing, Y1 - 2019/09/11/ PY - 2019/07/19/received PY - 2019/08/26/revised PY - 2019/09/10/accepted PY - 2019/9/30/pubmed PY - 2019/9/30/medline PY - 2019/9/30/entrez KW - CuO-Co(3)O(4)@CeO(2) nanoparticles KW - Degradation mechanism KW - Peroxymonosulfate KW - Sulfate radicals 2,4-dichlorophenoxyacetic acid SP - 121209 EP - 121209 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 381 N2 - CuO-Co3O4@CeO2 nanoparticles used as a heterogeneous catalyst were prepared via a sol-gel method and characterized by various techniques. For comparison, a series of oxides was investigated for activating peroxymonosulfate (PMS) during the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D). The results indicated that CuO-Co3O4@CeO2 exhibited the highest catalytic performance among the catalysts. Complete degradation of 2,4-D (20 mg/L) was realized within 45 min at 1 mM PMS, CuO-Co3O4@CeO2 loading of 0.07 g/L, and pH of 6. Recycling experiments confirmed that CuO-Co3O4@CeO2 was very stable, and the 2,4-D degradation efficiencies ranged from 100% to 97.5%, decreasing by only 2.5% after the fifth run. The outstanding catalysis of CuO-Co3O4@CeO2 resulted from the synergy of cerium, cobalt, and copper. Electron paramagnetic resonance and radical scavenger experiments confirmed the production of SO4• - and •OH radicals in the CuO-Co3O4@CeO2/PMS system, which were responsible for efficient decomposition of 2,4-D. Furthermore, the combination of CuO-Co3O4@CeO2 andPMS was applied to treat natural water containing 2,4-D, and a high 2,4-D removal rate was also achieved. Based on these results, it was deduced that CuO-Co3O4@CeO2 can be utilized as a catalyst to activate PMS and destroy organic contaminants in aqueous solution. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/31563670/CuO_Co3O4@CeO2_as_a_heterogeneous_catalyst_for_efficient_degradation_of_24_dichlorophenoxyacetic_acid_by_peroxymonosulfate_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(19)31163-X DB - PRIME DP - Unbound Medicine ER -
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