{"title":"通过在 P-CdS 纳米棒上装饰 Ag2S 来控制载流子分离，从而提高光催化氢气转化率","authors":"Cuina Yang, Jun Wu","doi":"10.1007/s10562-024-04794-9","DOIUrl":null,"url":null,"abstract":"<div><p>The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag<sub>2</sub>S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH<sub>2</sub>PO<sub>2</sub> in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag<sub>2</sub>S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag<sub>2</sub>S is 12.44 mmol·h<sup>−1</sup>·g<sup>−1</sup>, which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h<sup>−1</sup>·g<sup>−1</sup>). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag<sub>2</sub>S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"154 11","pages":"6157 - 6167"},"PeriodicalIF":2.3000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Controlling Carrier Separation by Ag2S Decoration on P-CdS Nanorods for Enhanced Photocatalytic Hydrogen Evolution\",\"authors\":\"Cuina Yang, Jun Wu\",\"doi\":\"10.1007/s10562-024-04794-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag<sub>2</sub>S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH<sub>2</sub>PO<sub>2</sub> in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag<sub>2</sub>S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag<sub>2</sub>S is 12.44 mmol·h<sup>−1</sup>·g<sup>−1</sup>, which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h<sup>−1</sup>·g<sup>−1</sup>). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag<sub>2</sub>S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"154 11\",\"pages\":\"6157 - 6167\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-024-04794-9\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04794-9","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Controlling Carrier Separation by Ag2S Decoration on P-CdS Nanorods for Enhanced Photocatalytic Hydrogen Evolution
The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag2S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH2PO2 in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag2S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag2S is 12.44 mmol·h−1·g−1, which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h−1·g−1). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag2S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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