Guoqiang Zhang , Yuhan He , Wenyi Huang , Zhenfang Xiao , Ziran Xue , Hao Cheng , Jun Feng , Yao Lu , Quan Liu , Lijun Li
{"title":"N/ s掺杂生物炭负载Bi和FeS激活过硫酸盐驱动的10o2高效降解氧氟沙星","authors":"Guoqiang Zhang , Yuhan He , Wenyi Huang , Zhenfang Xiao , Ziran Xue , Hao Cheng , Jun Feng , Yao Lu , Quan Liu , Lijun Li","doi":"10.1016/j.ultsonch.2025.107585","DOIUrl":null,"url":null,"abstract":"<div><div>Biochar-loaded Fe-based bimetals have been shown to be an effective catalyst for the activation of peroxodisulfates. However, reports on heteroatom-doped biochar-loaded Bi and FeS bimetals are scarce, and their properties and mechanisms remain unclear. In this study, NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> catalysts were constructed using reductive hydrothermal and calcination methods. The results showed that the reductive hydrothermal process made Bi and FeS tightly bound, thereby promoting the stability of the catalyst. Under the optimal conditions, the NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> system could completely degrade ofloxacin (OFX) within 20 min. Moreover, the NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> system had excellent stability and regeneration capabilities, and was able to efficiently degrade a wide range of organic pollutants. A series of mechanistic studies and density-functional theory(DFT) calculations confirmed the existence of multiple synergistic mechanisms in the activation of PDS by the catalyst, in which N doping favors the generation of <sup>1</sup>O<sub>2</sub> and S serves to promote the rapid transfer of the metal electrons; while, the introduction of Bi and FeS enhances the adsorption capacity of the catalyst for PDS, and the presence of Bi promotes the Fe<sup>3+</sup>/Fe<sup>2+</sup> cycle, which guarantees the continuation of the Fenton-like reaction. In summary, this study elucidated multiple reaction mechanisms in the visible light/NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub>/PDS system, which provides new design ideas for the development of heteroatom-doped biochar loaded with metals and metal sulfides for wastewater treatment.</div></div>","PeriodicalId":442,"journal":{"name":"Ultrasonics Sonochemistry","volume":"122 ","pages":"Article 107585"},"PeriodicalIF":9.7000,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"N/S-doped biochar-loaded Bi and FeS activated persulfate-driven 1O2 efficient degradation of ofloxacin\",\"authors\":\"Guoqiang Zhang , Yuhan He , Wenyi Huang , Zhenfang Xiao , Ziran Xue , Hao Cheng , Jun Feng , Yao Lu , Quan Liu , Lijun Li\",\"doi\":\"10.1016/j.ultsonch.2025.107585\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Biochar-loaded Fe-based bimetals have been shown to be an effective catalyst for the activation of peroxodisulfates. However, reports on heteroatom-doped biochar-loaded Bi and FeS bimetals are scarce, and their properties and mechanisms remain unclear. In this study, NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> catalysts were constructed using reductive hydrothermal and calcination methods. The results showed that the reductive hydrothermal process made Bi and FeS tightly bound, thereby promoting the stability of the catalyst. Under the optimal conditions, the NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> system could completely degrade ofloxacin (OFX) within 20 min. Moreover, the NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub> system had excellent stability and regeneration capabilities, and was able to efficiently degrade a wide range of organic pollutants. A series of mechanistic studies and density-functional theory(DFT) calculations confirmed the existence of multiple synergistic mechanisms in the activation of PDS by the catalyst, in which N doping favors the generation of <sup>1</sup>O<sub>2</sub> and S serves to promote the rapid transfer of the metal electrons; while, the introduction of Bi and FeS enhances the adsorption capacity of the catalyst for PDS, and the presence of Bi promotes the Fe<sup>3+</sup>/Fe<sup>2+</sup> cycle, which guarantees the continuation of the Fenton-like reaction. In summary, this study elucidated multiple reaction mechanisms in the visible light/NS<sub>4</sub>-Bi<sub>1</sub>FeS<sub>0.75</sub>/PDS system, which provides new design ideas for the development of heteroatom-doped biochar loaded with metals and metal sulfides for wastewater treatment.</div></div>\",\"PeriodicalId\":442,\"journal\":{\"name\":\"Ultrasonics Sonochemistry\",\"volume\":\"122 \",\"pages\":\"Article 107585\"},\"PeriodicalIF\":9.7000,\"publicationDate\":\"2025-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ultrasonics Sonochemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1350417725003645\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ACOUSTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ultrasonics Sonochemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1350417725003645","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}
N/S-doped biochar-loaded Bi and FeS activated persulfate-driven 1O2 efficient degradation of ofloxacin
Biochar-loaded Fe-based bimetals have been shown to be an effective catalyst for the activation of peroxodisulfates. However, reports on heteroatom-doped biochar-loaded Bi and FeS bimetals are scarce, and their properties and mechanisms remain unclear. In this study, NS4-Bi1FeS0.75 catalysts were constructed using reductive hydrothermal and calcination methods. The results showed that the reductive hydrothermal process made Bi and FeS tightly bound, thereby promoting the stability of the catalyst. Under the optimal conditions, the NS4-Bi1FeS0.75 system could completely degrade ofloxacin (OFX) within 20 min. Moreover, the NS4-Bi1FeS0.75 system had excellent stability and regeneration capabilities, and was able to efficiently degrade a wide range of organic pollutants. A series of mechanistic studies and density-functional theory(DFT) calculations confirmed the existence of multiple synergistic mechanisms in the activation of PDS by the catalyst, in which N doping favors the generation of 1O2 and S serves to promote the rapid transfer of the metal electrons; while, the introduction of Bi and FeS enhances the adsorption capacity of the catalyst for PDS, and the presence of Bi promotes the Fe3+/Fe2+ cycle, which guarantees the continuation of the Fenton-like reaction. In summary, this study elucidated multiple reaction mechanisms in the visible light/NS4-Bi1FeS0.75/PDS system, which provides new design ideas for the development of heteroatom-doped biochar loaded with metals and metal sulfides for wastewater treatment.
期刊介绍:
Ultrasonics Sonochemistry stands as a premier international journal dedicated to the publication of high-quality research articles primarily focusing on chemical reactions and reactors induced by ultrasonic waves, known as sonochemistry. Beyond chemical reactions, the journal also welcomes contributions related to cavitation-induced events and processing, including sonoluminescence, and the transformation of materials on chemical, physical, and biological levels.
Since its inception in 1994, Ultrasonics Sonochemistry has consistently maintained a top ranking in the "Acoustics" category, reflecting its esteemed reputation in the field. The journal publishes exceptional papers covering various areas of ultrasonics and sonochemistry. Its contributions are highly regarded by both academia and industry stakeholders, demonstrating its relevance and impact in advancing research and innovation.