Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism
How to efficiently activate peroxymonosulfate (PMS) in a complex water matrix to degrade organic pollutants still needs greater efforts, and cobalt-based bimetallic nanomaterials are desirable catalysts. In this paper, sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> nanomateria...
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MDPI AG
2023-12-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/1/152 |
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| author | Chunguang Chen Junkai Zhang Jia Liu Jiani Li Shuo Ma Aishui Yu |
| author_facet | Chunguang Chen Junkai Zhang Jia Liu Jiani Li Shuo Ma Aishui Yu |
| author_sort | Chunguang Chen |
| collection | DOAJ |
| description | How to efficiently activate peroxymonosulfate (PMS) in a complex water matrix to degrade organic pollutants still needs greater efforts, and cobalt-based bimetallic nanomaterials are desirable catalysts. In this paper, sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> nanomaterials were successfully prepared and comprehensively characterized for their structural, morphological and chemical properties via techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), among others. The sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> nanomaterials exhibited remarkable catalytic performance in activating PMS to degrade phenol. Within the NiCo<sub>2</sub>O<sub>4</sub>/PMS system, the removal rate of phenol (50 mg L<sup>−1</sup>, 250 mL) reached 100% after 45 min, with a reaction rate constant k of 0.091 min<sup>−1</sup>, which was 1.4-times higher than that of the monometallic compound Co<sub>3</sub>O<sub>4</sub>/PMS system. The outstanding catalytic activity of sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> primarily arises from the synergistic effect between Ni and Co ions. Additionally, a comprehensive analysis of key parameters influencing the catalytic activity of the sea urchin-like NiCo<sub>2</sub>O<sub>4</sub>/PMS system, including reaction temperature, initial pH of solution, initial concentration, catalyst and PMS dosages and coexisting anions (HCO<sub>3</sub><sup>−</sup>, Cl<sup>−</sup>, NO<sub>3</sub><sup>−</sup> and humic acid), was conducted. Cycling experiments show that the material has good chemical stability. Electron paramagnetic resonance (EPR) and quenching experiments verified that both radical activation (SO<sub>4</sub><sup>•−</sup>, <sup>•</sup>OH, O<sub>2</sub><sup>•−</sup>) and nonradical activation (<sup>1</sup>O<sub>2</sub>) are present in the NiCo<sub>2</sub>O<sub>4</sub>/PMS system. Finally, the possible degradation pathways in the NiCo<sub>2</sub>O<sub>4</sub>/PMS system were proposed based on gas chromatography–mass spectrometry (GC-MS). Favorably, sea urchin-like NiCo<sub>2</sub>O<sub>4</sub>-activated PMS is a promising technology for environmental treatment and the remediation of phenol-induced water pollution problems. |
| first_indexed | 2024-03-08T15:01:14Z |
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| language | English |
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| spelling | doaj.art-47a33d0fb98f440d8f09b986613c87952024-01-10T15:04:20ZengMDPI AGMolecules1420-30492023-12-0129115210.3390/molecules29010152Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and MechanismChunguang Chen0Junkai Zhang1Jia Liu2Jiani Li3Shuo Ma4Aishui Yu5Department of Chemistry, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, ChinaDepartment of Chemistry, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, ChinaDepartment of Chemistry, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, ChinaDepartment of Chemistry, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, ChinaDepartment of Chemistry, School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, ChinaShanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Institute of New Energy, Fudan University, Shanghai 200438, ChinaHow to efficiently activate peroxymonosulfate (PMS) in a complex water matrix to degrade organic pollutants still needs greater efforts, and cobalt-based bimetallic nanomaterials are desirable catalysts. In this paper, sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> nanomaterials were successfully prepared and comprehensively characterized for their structural, morphological and chemical properties via techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), among others. The sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> nanomaterials exhibited remarkable catalytic performance in activating PMS to degrade phenol. Within the NiCo<sub>2</sub>O<sub>4</sub>/PMS system, the removal rate of phenol (50 mg L<sup>−1</sup>, 250 mL) reached 100% after 45 min, with a reaction rate constant k of 0.091 min<sup>−1</sup>, which was 1.4-times higher than that of the monometallic compound Co<sub>3</sub>O<sub>4</sub>/PMS system. The outstanding catalytic activity of sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> primarily arises from the synergistic effect between Ni and Co ions. Additionally, a comprehensive analysis of key parameters influencing the catalytic activity of the sea urchin-like NiCo<sub>2</sub>O<sub>4</sub>/PMS system, including reaction temperature, initial pH of solution, initial concentration, catalyst and PMS dosages and coexisting anions (HCO<sub>3</sub><sup>−</sup>, Cl<sup>−</sup>, NO<sub>3</sub><sup>−</sup> and humic acid), was conducted. Cycling experiments show that the material has good chemical stability. Electron paramagnetic resonance (EPR) and quenching experiments verified that both radical activation (SO<sub>4</sub><sup>•−</sup>, <sup>•</sup>OH, O<sub>2</sub><sup>•−</sup>) and nonradical activation (<sup>1</sup>O<sub>2</sub>) are present in the NiCo<sub>2</sub>O<sub>4</sub>/PMS system. Finally, the possible degradation pathways in the NiCo<sub>2</sub>O<sub>4</sub>/PMS system were proposed based on gas chromatography–mass spectrometry (GC-MS). Favorably, sea urchin-like NiCo<sub>2</sub>O<sub>4</sub>-activated PMS is a promising technology for environmental treatment and the remediation of phenol-induced water pollution problems.https://www.mdpi.com/1420-3049/29/1/152PMS activationnon-radical activationradical activationsea urchin-like NiCo<sub>2</sub>O<sub>4</sub>synergistic effect |
| spellingShingle | Chunguang Chen Junkai Zhang Jia Liu Jiani Li Shuo Ma Aishui Yu Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism Molecules PMS activation non-radical activation radical activation sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> synergistic effect |
| title | Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism |
| title_full | Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism |
| title_fullStr | Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism |
| title_full_unstemmed | Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism |
| title_short | Sea Urchin-like NiCo<sub>2</sub>O<sub>4</sub> Catalyst Activated Peroxymonosulfate for Degradation of Phenol: Performance and Mechanism |
| title_sort | sea urchin like nico sub 2 sub o sub 4 sub catalyst activated peroxymonosulfate for degradation of phenol performance and mechanism |
| topic | PMS activation non-radical activation radical activation sea urchin-like NiCo<sub>2</sub>O<sub>4</sub> synergistic effect |
| url | https://www.mdpi.com/1420-3049/29/1/152 |
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