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An internal electric field and interfacial S–C bonds jointly accelerate S-scheme charge transfer achieving efficient sunlight-driven photocatalysis
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-11-15 , DOI: 10.1039/d2ta08337j Linlin Sun 1 , Xiaoshuo Liu 2 , Xiaohan Jiang 1 , Yibing Feng 1 , Xunlei Ding 3 , Nan Jiang 4 , Jigang Wang 1, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-11-15 , DOI: 10.1039/d2ta08337j Linlin Sun 1 , Xiaoshuo Liu 2 , Xiaohan Jiang 1 , Yibing Feng 1 , Xunlei Ding 3 , Nan Jiang 4 , Jigang Wang 1, 5
Affiliation
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Inadequate accessible active sites and inhibited electron separation efficiency are always burning issues. This work successfully solves the above problems by constructing a novel S-scheme heterojunction with S–C bonds bridging composed of hierarchical g-C3N4 (3DA-CN) coupled with sulfur vacancies (Sv) ZnIn2S4 (Sv-ZIS/CN). The special structure provides more active sites for the photocatalytic reaction and maintains multiple light transmission channels, resulting in the improvement of the capture and conversion of solar energy. The interfacial electric field and S–C bonds as well as their effects benefiting the regulation of the efficiency of electrons transfer for efficient photocatalytic reactions are deeply investigated and comprehended. The tetracycline degradation efficiency of Sv-ZIS/CN reaches 96.36% and has the highest k value (0.03361 min−1), which is 7.55, 5.47 and 3.04 times that of 3DA-CN, Sv-ZIS and ZIS-S/CN (prepared by a mechanical approach), respectively. Meanwhile, H2O2 production experiments also verified that the photocatalytic activity of Sv-ZIS/CN was significantly improved compared with ZIS-S/CN. The mechanisms of tetracycline degradation and H2O2 production are discussed in depth. This work provides an unparalleled and impressive strategy to construct significantly efficient photocatalysts.
中文翻译：
内部电场和界面 S-C 键共同加速 S 型电荷转移，实现高效的阳光驱动光催化
可及活性位点不足和电子分离效率受抑制一直是亟待解决的问题。这项工作通过构建由分级 gC 3 N 4 (3DA-CN) 和硫空位 (Sv) ZnIn 2 S 4组成的 S-C 键桥接的新型 S 型异质结成功解决了上述问题(SV-ZIS/CN)。特殊的结构为光催化反应提供了更多的活性位点，并保持了多个光传输通道，从而提高了太阳能的捕获和转换。深入研究和理解了界面电场和 S-C 键以及它们对调节电子转移效率以实现高效光催化反应的影响。Sv-ZIS/CN对四环素的降解效率达到96.36%，k值最高（0.03361 min -1），是3DA-CN、Sv-ZIS和ZIS-S/CN的7.55、5.47和3.04倍（分别通过机械方法制备）。同时，H 2 O 2生产实验也证实，与ZIS-S/CN相比，Sv-ZIS/CN的光催化活性有显着提高。深入讨论了四环素降解和 H 2 O 2生成的机制。这项工作提供了一种无与伦比且令人印象深刻的策略来构建显着高效的光催化剂。
更新日期：2022-11-15
中文翻译：
内部电场和界面 S-C 键共同加速 S 型电荷转移，实现高效的阳光驱动光催化
可及活性位点不足和电子分离效率受抑制一直是亟待解决的问题。这项工作通过构建由分级 gC 3 N 4 (3DA-CN) 和硫空位 (Sv) ZnIn 2 S 4组成的 S-C 键桥接的新型 S 型异质结成功解决了上述问题(SV-ZIS/CN)。特殊的结构为光催化反应提供了更多的活性位点，并保持了多个光传输通道，从而提高了太阳能的捕获和转换。深入研究和理解了界面电场和 S-C 键以及它们对调节电子转移效率以实现高效光催化反应的影响。Sv-ZIS/CN对四环素的降解效率达到96.36%，k值最高（0.03361 min -1），是3DA-CN、Sv-ZIS和ZIS-S/CN的7.55、5.47和3.04倍（分别通过机械方法制备）。同时，H 2 O 2生产实验也证实，与ZIS-S/CN相比，Sv-ZIS/CN的光催化活性有显着提高。深入讨论了四环素降解和 H 2 O 2生成的机制。这项工作提供了一种无与伦比且令人印象深刻的策略来构建显着高效的光催化剂。
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