Khaing Kyu Kyu, Yin Dongguang, Ouyang Yinggen, Xiao Songtao, Liu Bingqi, Deng Linlin, Li Luqiu, Guo Xiandi, Wang Jun, Liu Jinliang, Zhang Yong
School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, China.
Inorg Chem. 2020 May 18;59(10):6942-6952. doi: 10.1021/acs.inorgchem.0c00422. Epub 2020 May 7.
In this work, for the first time, we fabricated a novel covalent organic framework (COF)-based 2D-2D heterojunction composite MoS/COF by a facile hydrothermal method. The results of photocatalytic degradation of TC and RhB under simulated solar light irradiation showed that the as-prepared composite exhibited outstanding catalytic efficiency compared with pristine COFs and MoS. The significantly enhanced catalytic efficiency can be ascribed to the formation of 2D-2D heterojunction with a well-matched band position between COF and MoS, which can effectively restrain the recombination of charge carriers and increase the light absorption as well as the specific surface area. Moreover, the fabricated 2D-2D layered structure can effectively increase the contact area with an intimate interface contact, which greatly facilitates the charge mobility and transfer in the interfaces. This study reveals that artful integration of organic (COFs) and inorganic materials into a single hybrid with a 2D-2D interface is an effective strategy to fabricate highly efficient photocatalysts.
在本工作中，我们首次通过简便的水热法制备了一种新型的基于共价有机框架（COF）的二维-二维异质结复合材料MoS₂/COF。在模拟太阳光照射下对TC和RhB进行光催化降解的结果表明，与原始的COF和MoS₂相比，所制备的复合材料表现出优异的催化效率。催化效率的显著提高可归因于形成了二维-二维异质结，其中COF和MoS₂之间的能带位置匹配良好，这可以有效地抑制电荷载流子的复合，并增加光吸收以及比表面积。此外，所制备的二维-二维层状结构可以通过紧密的界面接触有效地增加接触面积，这极大地促进了界面中的电荷迁移和转移。这项研究表明，将有机（COF）和无机材料巧妙地整合到具有二维-二维界面的单一杂化材料中是制备高效光催化剂的有效策略。
