Han Sun , Yonghao Dong , Lei Wang , Xudong Wang , Junwei Xin , Jie Ren , Ruosong Jing , Jiayuan Yan , Yichun Xue , Keyan Zhao
{"title":"通过硫空位调节g-C3N4/ ZnIn2S4的费米能级,实现载流子迁移途径转化,增强光催化莫西沙星降解活性","authors":"Han Sun , Yonghao Dong , Lei Wang , Xudong Wang , Junwei Xin , Jie Ren , Ruosong Jing , Jiayuan Yan , Yichun Xue , Keyan Zhao","doi":"10.1016/j.jece.2025.117494","DOIUrl":null,"url":null,"abstract":"<div><div>Regulating the carrier migration pathways in photocatalysts is an effective strategy to enhance their photocatalytic performance. In this study, a novel approach was proposed to modulate the carrier migration pathways in type-II g-C<sub>3</sub>N<sub>4</sub>/ZnIn<sub>2</sub>S<sub>4</sub> (CN/ZIS-Vp) heterojunction by utilizing sulfur vacancies. Integrating findings from experiments and density functional theory analyses, the introduction of sulfur vacancies increased the donor carrier concentration and elevated the Fermi level of vacancy-rich ZIS (ZIS-Vr), leading to the opposite direction of photogenerated carrier migration in the CN/ZIS-Vr heterojunction as compared with that in the CN/ZIS-Vp, so that the introduction of sulfur vacancies transformed the heterojunction structure from type-II to S-scheme, which strengthened the separation and migration efficiency of photogenerated carriers as well as the intensity of internal electric field. As a result, the CN/ZIS-Vr heterojunction achieved a remarkable photocatalytic degradation efficiency of 95.36 % for moxifloxacin (MOXI), corresponding to a degradation rate of 0.0416 min<sup>−1</sup>, which was 2.11 times higher than that of the CN/ZIS-Vp system. The degradation products of MOXI have lower environmental hazards. This work offers valuable insights into the rational design of S-scheme photocatalysts for the efficient degradation of MOXI.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117494"},"PeriodicalIF":7.4000,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Achieving carrier migration pathway transformation to enhance photocatalytic moxifloxacin degradation activity by regulating the Fermi Level of g-C3N4/ ZnIn2S4 through sulfur vacancies\",\"authors\":\"Han Sun , Yonghao Dong , Lei Wang , Xudong Wang , Junwei Xin , Jie Ren , Ruosong Jing , Jiayuan Yan , Yichun Xue , Keyan Zhao\",\"doi\":\"10.1016/j.jece.2025.117494\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Regulating the carrier migration pathways in photocatalysts is an effective strategy to enhance their photocatalytic performance. In this study, a novel approach was proposed to modulate the carrier migration pathways in type-II g-C<sub>3</sub>N<sub>4</sub>/ZnIn<sub>2</sub>S<sub>4</sub> (CN/ZIS-Vp) heterojunction by utilizing sulfur vacancies. Integrating findings from experiments and density functional theory analyses, the introduction of sulfur vacancies increased the donor carrier concentration and elevated the Fermi level of vacancy-rich ZIS (ZIS-Vr), leading to the opposite direction of photogenerated carrier migration in the CN/ZIS-Vr heterojunction as compared with that in the CN/ZIS-Vp, so that the introduction of sulfur vacancies transformed the heterojunction structure from type-II to S-scheme, which strengthened the separation and migration efficiency of photogenerated carriers as well as the intensity of internal electric field. As a result, the CN/ZIS-Vr heterojunction achieved a remarkable photocatalytic degradation efficiency of 95.36 % for moxifloxacin (MOXI), corresponding to a degradation rate of 0.0416 min<sup>−1</sup>, which was 2.11 times higher than that of the CN/ZIS-Vp system. The degradation products of MOXI have lower environmental hazards. This work offers valuable insights into the rational design of S-scheme photocatalysts for the efficient degradation of MOXI.</div></div>\",\"PeriodicalId\":15759,\"journal\":{\"name\":\"Journal of Environmental Chemical Engineering\",\"volume\":\"13 5\",\"pages\":\"Article 117494\"},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2025-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Environmental Chemical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213343725021906\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213343725021906","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Achieving carrier migration pathway transformation to enhance photocatalytic moxifloxacin degradation activity by regulating the Fermi Level of g-C3N4/ ZnIn2S4 through sulfur vacancies
Regulating the carrier migration pathways in photocatalysts is an effective strategy to enhance their photocatalytic performance. In this study, a novel approach was proposed to modulate the carrier migration pathways in type-II g-C3N4/ZnIn2S4 (CN/ZIS-Vp) heterojunction by utilizing sulfur vacancies. Integrating findings from experiments and density functional theory analyses, the introduction of sulfur vacancies increased the donor carrier concentration and elevated the Fermi level of vacancy-rich ZIS (ZIS-Vr), leading to the opposite direction of photogenerated carrier migration in the CN/ZIS-Vr heterojunction as compared with that in the CN/ZIS-Vp, so that the introduction of sulfur vacancies transformed the heterojunction structure from type-II to S-scheme, which strengthened the separation and migration efficiency of photogenerated carriers as well as the intensity of internal electric field. As a result, the CN/ZIS-Vr heterojunction achieved a remarkable photocatalytic degradation efficiency of 95.36 % for moxifloxacin (MOXI), corresponding to a degradation rate of 0.0416 min−1, which was 2.11 times higher than that of the CN/ZIS-Vp system. The degradation products of MOXI have lower environmental hazards. This work offers valuable insights into the rational design of S-scheme photocatalysts for the efficient degradation of MOXI.
期刊介绍:
The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.