Jianqiang Luo , Hao Xiong , Hongxia Jiang , Jiaqi Li , Chen Meng , Shujuan Liu , Jianguo Ma
{"title":"原位构建用于可见光光催化铀还原的 2D/2D SnS2/MXene 异质结","authors":"Jianqiang Luo , Hao Xiong , Hongxia Jiang , Jiaqi Li , Chen Meng , Shujuan Liu , Jianguo Ma","doi":"10.1039/d4cy00348a","DOIUrl":null,"url":null,"abstract":"<div><p>The photocatalytic reduction of soluble U(<span>vi</span>) into insoluble species presents a promising technique for removing radioactive uranium species from solution. The critical aspect in this field lies in the development of high-performance photocatalysts. Herein, a MXene (Ti<sub>3</sub>C<sub>2</sub>) and 2D SnS<sub>2</sub> nanosheet composite is synthesized by a one-step hydrothermal method. The as-synthesized SnS<sub>2</sub>/MXene heterostructure can reduce 93% of U(<span>vi</span>) under visible light irradiation in 200 min, which is 25% higher than pure SnS<sub>2</sub>. In addition, SnS<sub>2</sub>/MXene exhibited high stability and can endure more than 6 photocatalytic cycles, with the removal ratio of U(<span>vi</span>) remaining above 84%. Based on XPS, UV-vis, and PL analyses, the construction of a SnS<sub>2</sub>/MXene heterojunction not only improves the adsorption capability of visible light but also augments the efficiency of charge separation and transport. Additionally, DFT calculations further corroborate this enhancement mechanism by elucidating the formation of a built-in electric field between SnS<sub>2</sub> and MXene slabs.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":"14 13","pages":"Pages 3748-3755"},"PeriodicalIF":4.2000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In situ construction of a 2D/2D SnS2/MXene heterojunction for visible-light photocatalytic uranium reduction\",\"authors\":\"Jianqiang Luo , Hao Xiong , Hongxia Jiang , Jiaqi Li , Chen Meng , Shujuan Liu , Jianguo Ma\",\"doi\":\"10.1039/d4cy00348a\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The photocatalytic reduction of soluble U(<span>vi</span>) into insoluble species presents a promising technique for removing radioactive uranium species from solution. The critical aspect in this field lies in the development of high-performance photocatalysts. Herein, a MXene (Ti<sub>3</sub>C<sub>2</sub>) and 2D SnS<sub>2</sub> nanosheet composite is synthesized by a one-step hydrothermal method. The as-synthesized SnS<sub>2</sub>/MXene heterostructure can reduce 93% of U(<span>vi</span>) under visible light irradiation in 200 min, which is 25% higher than pure SnS<sub>2</sub>. In addition, SnS<sub>2</sub>/MXene exhibited high stability and can endure more than 6 photocatalytic cycles, with the removal ratio of U(<span>vi</span>) remaining above 84%. Based on XPS, UV-vis, and PL analyses, the construction of a SnS<sub>2</sub>/MXene heterojunction not only improves the adsorption capability of visible light but also augments the efficiency of charge separation and transport. Additionally, DFT calculations further corroborate this enhancement mechanism by elucidating the formation of a built-in electric field between SnS<sub>2</sub> and MXene slabs.</p></div>\",\"PeriodicalId\":66,\"journal\":{\"name\":\"Catalysis Science & Technology\",\"volume\":\"14 13\",\"pages\":\"Pages 3748-3755\"},\"PeriodicalIF\":4.2000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Science & Technology\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/org/science/article/pii/S2044475324003265\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Science & Technology","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/org/science/article/pii/S2044475324003265","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
In situ construction of a 2D/2D SnS2/MXene heterojunction for visible-light photocatalytic uranium reduction
The photocatalytic reduction of soluble U(vi) into insoluble species presents a promising technique for removing radioactive uranium species from solution. The critical aspect in this field lies in the development of high-performance photocatalysts. Herein, a MXene (Ti3C2) and 2D SnS2 nanosheet composite is synthesized by a one-step hydrothermal method. The as-synthesized SnS2/MXene heterostructure can reduce 93% of U(vi) under visible light irradiation in 200 min, which is 25% higher than pure SnS2. In addition, SnS2/MXene exhibited high stability and can endure more than 6 photocatalytic cycles, with the removal ratio of U(vi) remaining above 84%. Based on XPS, UV-vis, and PL analyses, the construction of a SnS2/MXene heterojunction not only improves the adsorption capability of visible light but also augments the efficiency of charge separation and transport. Additionally, DFT calculations further corroborate this enhancement mechanism by elucidating the formation of a built-in electric field between SnS2 and MXene slabs.
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A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis.
Editor-in-chief: Bert Weckhuysen
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