College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, PR China.
College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, PR China.
Adv Colloid Interface Sci. 2021 Nov;297:102540. doi: 10.1016/j.cis.2021.102540. Epub 2021 Oct 5.
Photocatalysis is considered to be an effective way to remove organic pollutants, but the key to photocatalysis is finding a high-efficiency and stable photocatalyst. 2D materials-based heterojunction has aroused widespread concerns in photocatalysis because of its merits in more active sites, adjustable band gaps and shorter charge transfer distance. Among various 2D heterojunction systems, 2D/2D heterojunction with a face-to-face contact interface is regarded as a highly promising photocatalyst. Due to the strong coupling interface in 2D/2D heterojunction, the separation and migration of photoexcited electron-hole pairs are facilitated, which enhances the photocatalytic performance. Thus, the design of 2D/2D heterojunction can become a potential model for expanding the application of photocatalysis in the removal of organic pollutants. Herein, in this review, we first summarize the fundamental principles, classification, and strategies for elevating photocatalytic performance. Then, the synthesis and application of the 2D/2D heterojunction system for the removal of organic pollutants are discussed. Finally, the challenges and perspectives in 2D/2D heterojunction photocatalysts and their application for removing organic pollutants are presented.
光催化被认为是去除有机污染物的一种有效方法，但光催化的关键是找到高效稳定的光催化剂。基于二维材料的异质结由于具有更多的活性位点、可调带隙和更短的电荷转移距离，在光催化中引起了广泛的关注。在各种二维异质结体系中，具有面对面接触界面的 2D/2D 异质结被认为是一种很有前途的光催化剂。由于 2D/2D 异质结中存在强耦合界面，有利于光生电子-空穴对的分离和迁移，从而提高了光催化性能。因此，设计 2D/2D 异质结可以成为拓展光催化在去除有机污染物方面应用的潜在模型。在此，本文首先总结了提升光催化性能的基本原理、分类和策略。然后，讨论了 2D/2D 异质结体系的合成及在去除有机污染物方面的应用。最后，提出了 2D/2D 异质结光催化剂在去除有机污染物方面的挑战和展望。
