Du Jun, Li Keyan, Wu Jiaming, Shi Hainan, Song Chunshan, Guo Xinwen
State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, People's Republic of China.
Department of Chemistry, Faculty of Science, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, People's Republic of China.
ACS Appl Mater Interfaces. 2024 May 29;16(21):27301-27310. doi: 10.1021/acsami.4c02158. Epub 2024 May 17.
The in-plane heterojunctions with atomic-level thickness and chemical-bond-connected tight interfaces possess high carrier separation efficiency and fully exposed surface active sites, thus exhibiting exceptional photocatalytic performance. However, the construction of in-plane heterojunctions remains a significant challenge. Herein, we prepared an in-plane ZnInS/In(OH) heterojunction (ZISOH) by partial conversion of ZnInS to In(OH) through the addition of HO. This oxidation etching-hydrolysis approach enables the ZISOH heterojunction to not only preserve the original nanosheet morphology of ZnInS but also form an intimate interface. Moreover, generated In(OH) serves as an electron-accepting platform and also promotes the adsorption of CO. As a result, the heterojunction exhibits a remarkably enhanced performance for photocatalytic CO reduction. The production rate and selectivity of CO reach 1760 μmol g h and 78%, respectively, significantly higher than those of ZnInS (842 μmol g h and 65%). This work puts forward a feasible and facile approach to construct in-plane heterojunctions to enhance the photocatalytic performance of two-dimensional metal sulfides.
具有原子级厚度和化学键连接紧密界面的面内异质结具有高载流子分离效率和完全暴露的表面活性位点，因此表现出优异的光催化性能。然而，面内异质结的构建仍然是一个重大挑战。在此，我们通过添加HO将ZnInS部分转化为In(OH)，制备了一种面内ZnInS/In(OH)异质结（ZISOH）。这种氧化蚀刻-水解方法使ZISOH异质结不仅保留了ZnInS原有的纳米片形态，还形成了紧密的界面。此外，生成的In(OH)作为电子接受平台，还促进了CO的吸附。结果，该异质结在光催化CO还原方面表现出显著增强的性能。CO的产率和选择性分别达到1760 μmol g h和78%，明显高于ZnInS（842 μmol g h和65%）。这项工作提出了一种可行且简便的方法来构建面内异质结，以提高二维金属硫化物的光催化性能。
