Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.seppur.2026.137618 |
| Titel (primär) | Regulating interfacial electron flow in Cu2S@Co3S4 Core–Shell heterostructures promoting H2O2 activation for singlet oxygen generation to efficiently degrade tetracycline |
| Autor | Deng, L.; Han, S.; Chen, H.; Yang, L.; Guo, P.; Shi, Z.; Zhang, H.
|
| Quelle | Separation and Purification Technology |
| Erscheinungsjahr | 2026 |
| Department | TECH |
| Band/Volume | 394, Part 3 |
| Seite von | art. 137618 |
| Sprache | englisch |
| Topic | T7 Bioeconomy |
| Supplements | Supplement 1 |
| Keywords | AOPs; Co3S4; Cu2S; Tetracycline degradation; 1O2; Electron transfer process |
| Abstract | The widespread use and improper discharge of tetracycline (TC) pose significant threats to environmental safety and human health, necessitating the development of efficient removal technologies. Herein, a core-shell heterostructure, Cu2S@Co3S4, was successfully synthesized via a hydrothermal method for activating H2O2 to degrade TC. Comprehensive characterization confirmed the well-defined cubic morphology and intimate interfacial contact between the Cu2S core and Co3S4 shell. The optimized Cu2S@Co3S4 demonstrated outstanding catalytic performance, remarkably removing over 97% of TC within 30 min and achieving a rate constant of 0.11 min−1. This surpassed pure Co3S4 (0.004 min−1) and Cu2S (0.030 min−1) by factors of 27.5 and 3.6, respectively. The system demonstrated high efficiency across a broad pH range (5–11) and showed strong resistance to common interfering ions. Mechanistic investigations, including quenching experiments, EPR analysis, and DFT calculations, revealed that 1O2 was the predominant reactive species. The internal electron transfer from Cu2S to Co3S4 enhanced H2O2 adsorption and activation, facilitating efficient electron transfer from TC to the surface-activated H2O2 complex. Besides, the redox cycles of Cu+/Cu2+ and Co2+/Co3+, promoted by low-valence sulfur, sustained catalytic activity. Degradation pathways were proposed, and toxicity assessment indicated the effective detoxification of TC. This work provides a highly efficient and stable heterostructured catalyst and offers deep insight into the H2O2 activation mechanism dominated by 1O2 for antibiotic wastewater remediation. |
| Deng, L., Han, S., Chen, H., Yang, L., Guo, P., Shi, Z., Zhang, H. (2026): Regulating interfacial electron flow in Cu2S@Co3S4 Core–Shell heterostructures promoting H2O2 activation for singlet oxygen generation to efficiently degrade tetracycline Sep. Purif. Technol. 394, Part 3 , art. 137618 10.1016/j.seppur.2026.137618 |
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