Zhang Zhiyong, Wang Yang, Niu Ben, Liu Bo, Li Jianfeng, Duan Wubiao
Department of Materials Science and Engineering, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China.
College of Materials Science and Opto-electronic Technology, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing 101408, People's Republic of China.
Nanoscale. 2022 May 19;14(19):7146-7150. doi: 10.1039/d2nr01827f.
Two-dimensional (2D) metal-organic frameworks (MOFs) are some of the most promising photocatalysts owing to their high numbers of exposed active sites and excellent charge mobility. However, the synthesis of highly stable 2D MOF photocatalysts involves challenges, and examples have been rarely reported. Herein, a new kind of material, 2D indium-based porphyrin MOF cubic nanosheets (2D In-TCPP NS) with an average thickness of ∼3.97 nm, is synthesized a surfactant-assisted approach, and it shows good chemical stability in the pH range of 2-11 in aqueous solution. In photocatalytic H-generation experiments, 2D In-TCPP NS exhibits activity that is enhanced by over one order of magnitude compared with the 3D bulk In-TCPP MOF, arising from its highly enhanced electron-hole separation abilities. Moreover, after 40 h of continuous photocatalysis testing, 2D In-TCPP NS shows nearly no activity decrease, which suggests its great potential for practical commercial use.
二维（2D）金属有机框架（MOF）因其大量暴露的活性位点和出色的电荷迁移率而成为最有前景的光催化剂之一。然而，合成高度稳定的二维MOF光催化剂存在挑战，相关报道很少。在此，通过一种表面活性剂辅助方法合成了一种新型材料——平均厚度约为3.97 nm的二维铟基卟啉MOF立方纳米片（2D In-TCPP NS），并且它在水溶液中pH值为2至11的范围内表现出良好的化学稳定性。在光催化产氢实验中，2D In-TCPP NS的活性比三维块状In-TCPP MOF提高了一个多数量级，这源于其高度增强的电子-空穴分离能力。此外，经过40小时的连续光催化测试后，2D In-TCPP NS几乎没有活性下降，这表明其在实际商业应用中具有巨大潜力。
