Danmei Luo, Heng Zhang, Xingxing An, Jia Zhao, Can Feng, Jialong Yin, Mengfan Luo, Tao Wei, Yang Liu, Yanbiao Shi, Jing Zhang, Bo Lai
{"title":"硫掺杂碳点/高锰酸盐工艺对DCF降解的协同效应:机理与途径。","authors":"Danmei Luo, Heng Zhang, Xingxing An, Jia Zhao, Can Feng, Jialong Yin, Mengfan Luo, Tao Wei, Yang Liu, Yanbiao Shi, Jing Zhang, Bo Lai","doi":"10.1016/j.jhazmat.2025.138567","DOIUrl":null,"url":null,"abstract":"<p><p>Extensive research has explored strategies to enhance permanganate (PM) oxidation capacity, with carbon materials having shown significant promise in treating refractory organic pollutants in water. However, the impacts of carbon quantum dots (CQDs) and heteroatom-doped CQDs on PM oxidation remain unclear, warranting further investigation. In this study, we found that sulfur-doped CQDs (SCQDs) significantly outperformed CQDs, nitrogen-doped CQDs (NCQDs), and boron-doped CQDs (BCQDs) in promoting the oxidation reaction of diclofenac sodium (DCF) by PM. Through quenching experiments, light-shielding tests, and UV-Vis spectroscopy, we revealed that the PM/SCQDs system could rapidly and stably generate Mn(III) and MnO<sub>2</sub>, thereby facilitating the removal of DCF. Characterization analysis showed that SCQDs possess a surface enriched with diverse functional groups, and sulfur doping further enhances their electron cloud density. This structural characteristic enhances the ability of SCQDs to donate electrons to permanganate, thereby promoting its reduction to Mn(III) and MnO<sub>2</sub>. A comprehensive evaluation of key operational parameters governing the PM/SCQDs system performance was conducted. Additionally, the PM/SCQDs system exhibited substantial resistance to interference from common matrix ions and natural organic matter in water. The study provides a new perspective on enhancing permanganate oxidation by SCQDs and offers a promising pathway for efficient water pollutant degradation.</p>","PeriodicalId":94082,"journal":{"name":"Journal of hazardous materials","volume":"494 ","pages":"138567"},"PeriodicalIF":0.0000,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic effects of sulfur-doped carbon dots/permanganate process for DCF degradation: Mechanism and pathways.\",\"authors\":\"Danmei Luo, Heng Zhang, Xingxing An, Jia Zhao, Can Feng, Jialong Yin, Mengfan Luo, Tao Wei, Yang Liu, Yanbiao Shi, Jing Zhang, Bo Lai\",\"doi\":\"10.1016/j.jhazmat.2025.138567\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Extensive research has explored strategies to enhance permanganate (PM) oxidation capacity, with carbon materials having shown significant promise in treating refractory organic pollutants in water. However, the impacts of carbon quantum dots (CQDs) and heteroatom-doped CQDs on PM oxidation remain unclear, warranting further investigation. In this study, we found that sulfur-doped CQDs (SCQDs) significantly outperformed CQDs, nitrogen-doped CQDs (NCQDs), and boron-doped CQDs (BCQDs) in promoting the oxidation reaction of diclofenac sodium (DCF) by PM. Through quenching experiments, light-shielding tests, and UV-Vis spectroscopy, we revealed that the PM/SCQDs system could rapidly and stably generate Mn(III) and MnO<sub>2</sub>, thereby facilitating the removal of DCF. Characterization analysis showed that SCQDs possess a surface enriched with diverse functional groups, and sulfur doping further enhances their electron cloud density. This structural characteristic enhances the ability of SCQDs to donate electrons to permanganate, thereby promoting its reduction to Mn(III) and MnO<sub>2</sub>. A comprehensive evaluation of key operational parameters governing the PM/SCQDs system performance was conducted. Additionally, the PM/SCQDs system exhibited substantial resistance to interference from common matrix ions and natural organic matter in water. The study provides a new perspective on enhancing permanganate oxidation by SCQDs and offers a promising pathway for efficient water pollutant degradation.</p>\",\"PeriodicalId\":94082,\"journal\":{\"name\":\"Journal of hazardous materials\",\"volume\":\"494 \",\"pages\":\"138567\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-05-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of hazardous materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jhazmat.2025.138567\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of hazardous materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.jhazmat.2025.138567","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Synergistic effects of sulfur-doped carbon dots/permanganate process for DCF degradation: Mechanism and pathways.
Extensive research has explored strategies to enhance permanganate (PM) oxidation capacity, with carbon materials having shown significant promise in treating refractory organic pollutants in water. However, the impacts of carbon quantum dots (CQDs) and heteroatom-doped CQDs on PM oxidation remain unclear, warranting further investigation. In this study, we found that sulfur-doped CQDs (SCQDs) significantly outperformed CQDs, nitrogen-doped CQDs (NCQDs), and boron-doped CQDs (BCQDs) in promoting the oxidation reaction of diclofenac sodium (DCF) by PM. Through quenching experiments, light-shielding tests, and UV-Vis spectroscopy, we revealed that the PM/SCQDs system could rapidly and stably generate Mn(III) and MnO2, thereby facilitating the removal of DCF. Characterization analysis showed that SCQDs possess a surface enriched with diverse functional groups, and sulfur doping further enhances their electron cloud density. This structural characteristic enhances the ability of SCQDs to donate electrons to permanganate, thereby promoting its reduction to Mn(III) and MnO2. A comprehensive evaluation of key operational parameters governing the PM/SCQDs system performance was conducted. Additionally, the PM/SCQDs system exhibited substantial resistance to interference from common matrix ions and natural organic matter in water. The study provides a new perspective on enhancing permanganate oxidation by SCQDs and offers a promising pathway for efficient water pollutant degradation.