Efficient removal of bisphenol A by carbon nitride/peroxymonosulfate/solar system: multi-radical association mechanism by the morphology and crystallinity optimization
Two types of carbon nitrides were prepared by a thermal polymerization method with melamine and prefabricated supermolecules as precursors, and then used for the degradation of bisphenol A (BPA) in the presence of peroxymonosulfate (PMS) and simulated sunlight. The results showed that the 20 mg $ L^{−1} $ of BPA can be completely degraded within 40 min using 0.1 g $ L^{−1} $ supramolecular-derived g-$ C_{3} $$ N_{4} $ (SCN) and 1 mM PMS, which is 3.7 times higher than the bulk CN (BCN). Moreover, it also demonstrates good stability in a wide pH range (3–11) and good reusability in continuous runs. The superior performance of SCN was attributed to the photogenerated electron-mediated synergistic effect arising from its unique morphology and higher crystallinity. The superoxide radicals (⋅$ O_{2} $–) were revealed as the primary reactive oxygen radicals by electron spin resonance results and free radical quenching tests. Apart from that, singlet oxygen, hydroxyl radicals, sulfate radicals, and holes were also detected in the SCN/PMS/solar system, jointly contributing to the efficient degradation of BPA. Graphical abstract.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:137 |
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| Enthalten in: |
Reaction kinetics, mechanisms and catalysis - 137(2024), 2 vom: 17. Jan., Seite 1015-1030 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Ning [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
BPA |
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| Anmerkungen: |
© Akadémiai Kiadó, Budapest, Hungary 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| doi: |
10.1007/s11144-024-02566-5 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Two types of carbon nitrides were prepared by a thermal polymerization method with melamine and prefabricated supermolecules as precursors, and then used for the degradation of bisphenol A (BPA) in the presence of peroxymonosulfate (PMS) and simulated sunlight. The results showed that the 20 mg $ L^{−1} $ of BPA can be completely degraded within 40 min using 0.1 g $ L^{−1} $ supramolecular-derived g-$ C_{3} $$ N_{4} $ (SCN) and 1 mM PMS, which is 3.7 times higher than the bulk CN (BCN). Moreover, it also demonstrates good stability in a wide pH range (3–11) and good reusability in continuous runs. The superior performance of SCN was attributed to the photogenerated electron-mediated synergistic effect arising from its unique morphology and higher crystallinity. The superoxide radicals (⋅$ O_{2} $–) were revealed as the primary reactive oxygen radicals by electron spin resonance results and free radical quenching tests. Apart from that, singlet oxygen, hydroxyl radicals, sulfate radicals, and holes were also detected in the SCN/PMS/solar system, jointly contributing to the efficient degradation of BPA. Graphical abstract | ||
| 650 | 4 | |a Peroxymonosulfate activation |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Supramolecular-derived graphitic carbon nitride |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Photogenerated electrons |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a BPA |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Simulated sunlight |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Li, Jianfeng |4 aut | |
| 700 | 1 | |a Wu, Haibin |4 aut | |
| 700 | 1 | |a Lv, Hongzhou |4 aut | |
| 700 | 1 | |a Zhao, Huazhang |4 aut | |
| 700 | 1 | |a Cheng, Fangqin |4 aut | |
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