ZnIn2S4 nanosheets with tunable dual vacancies for efficient sacrificial-agent-free H2O2 photosynthesis

IF 6.1 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Inorganic Chemistry Frontiers Pub Date : 2024-10-11 DOI:10.1039/d4qi02030h

Chen Zhang, Gao Xu, Qifeng Liang, Li Liang, Zebo Fang, Rong Wu, Shunhang Wei, Lei Wang, Xiaoxiang Xu

{"title":"ZnIn2S4 nanosheets with tunable dual vacancies for efficient sacrificial-agent-free H2O2 photosynthesis","authors":"Chen Zhang, Gao Xu, Qifeng Liang, Li Liang, Zebo Fang, Rong Wu, Shunhang Wei, Lei Wang, Xiaoxiang Xu","doi":"10.1039/d4qi02030h","DOIUrl":null,"url":null,"abstract":"ZnIn2S4 nanosheets with tunable concentration of dual vacancies (i.e. Zn vacancy and S vacancy) have been prepared and used for photocatalytic H2O2 production. Introducing dual vacancies effectively promotes exciton dissociation, facilitates O2 adsorption, and reduces free energy of subsequent activation and protonation of the adsorbed O2. These intriguing properties endorse ZnIn2S4 excellent performance for sacrificial-agent-free H2O2 photosynthesis via a two-step single-electron oxygen reduction reaction pathway under AM 1.5 and visible-light irradiation. Almost double amounts of H2O2 can be produced over ZnIn2S4 with dual vacancies compared to pristine ZnIn2S4 without vacancy. The corresponding SCC efficiency and AQY at 420 ± 20 nm reach ~ 0.031% and 0.34%, respectively. In addition, the abundant dual-vacancies inhibit H2O2 decomposition because of the enhanced hydrophilicity. This work provides a new strategy to improve the photocatalytic performance of ZnIn2S4 through defect engineering and brings new mechanistic insights to the role of these defects.","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":null,"pages":null},"PeriodicalIF":6.1000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d4qi02030h","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}

引用次数: 0

Abstract

ZnIn2S4 nanosheets with tunable concentration of dual vacancies (i.e. Zn vacancy and S vacancy) have been prepared and used for photocatalytic H2O2 production. Introducing dual vacancies effectively promotes exciton dissociation, facilitates O2 adsorption, and reduces free energy of subsequent activation and protonation of the adsorbed O2. These intriguing properties endorse ZnIn2S4 excellent performance for sacrificial-agent-free H2O2 photosynthesis via a two-step single-electron oxygen reduction reaction pathway under AM 1.5 and visible-light irradiation. Almost double amounts of H2O2 can be produced over ZnIn2S4 with dual vacancies compared to pristine ZnIn2S4 without vacancy. The corresponding SCC efficiency and AQY at 420 ± 20 nm reach ~ 0.031% and 0.34%, respectively. In addition, the abundant dual-vacancies inhibit H2O2 decomposition because of the enhanced hydrophilicity. This work provides a new strategy to improve the photocatalytic performance of ZnIn2S4 through defect engineering and brings new mechanistic insights to the role of these defects.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

具有可调双空位的 ZnIn2S4 纳米片用于高效的无牺牲剂 H2O2 光合作用

制备了具有可调双空位（即 Zn 空位和 S 空位）浓度的 ZnIn2S4 纳米片，并将其用于光催化 H2O2 生产。引入双空位可有效促进激子解离，促进 O2 吸附，并降低吸附的 O2 随后活化和质子化的自由能。在 AM 1.5 和可见光辐照下，ZnIn2S4 通过两步单电子氧还原反应途径，实现了无牺牲剂的 H2O2 光合作用，这些令人感兴趣的特性证明了 ZnIn2S4 的卓越性能。与没有空位的原始 ZnIn2S4 相比，具有双空位的 ZnIn2S4 几乎可以产生双倍量的 H2O2。在 420 ± 20 纳米波长下，相应的 SCC 效率和 AQY 分别达到约 0.031% 和 0.34%。此外，由于亲水性增强，丰富的双空位抑制了 H2O2 的分解。这项工作为通过缺陷工程改善 ZnIn2S4 的光催化性能提供了一种新策略，并为这些缺陷的作用带来了新的机理认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊