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Recent progress in ultrathin two-dimensional semiconductors for photocatalysis

机译：超薄二维半导体光催化研究进展

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摘要

Benefiting from the unique electronic structures and high specific surface areas, two-dimensional (2D) semiconductors present significant advantages in photocatalytic researches for realizing efficient solar energy utilization. As compared with the bulk counterparts, 2D semiconductors tend to possess distinct photoexcitation processes and thus diverse photocatalytic behaviors, owing to the abundant surface structural factors and strong quantum confinement effects. Accordingly, enormous efforts have been devoted to exploring the relationship between the structure and photoexcitation processes in 2D semiconductors, for the sake of the optimization of photocatalytic performance. The attempts not only establish various new 2D semiconductor-based photocatalysts, but also provide in-depth understanding on the involved relevant mechanisms. Herein, an overview of recent advances in the exploitation of 2D semiconductors in photocatalytic applications is presented. By summarizing the investigations on structural characterization and photoexcitation processes, we highlight the relationship between structural factors and photocatalytic performance; in particular, the impacts of excitonic effects mediated by Coulomb interactions on photocatalytic behaviors are discussed. We conclude the review by exploring the future challenges and opportunities for the developments of 2D materials on photocatalytic areas.
机译：得益于独特的电子结构和高比表面积，二维（2D）半导体在实现高效太阳能利用的光催化研究中具有显着优势。与大量的同类产品相比，由于具有丰富的表面结构因素和强大的量子限制效应，二维半导体倾向于具有独特的光激发过程，因此具有多种光催化行为。因此，为了优化光催化性能，已经投入了巨大的努力来探索2D半导体中的结构与光激发过程之间的关系。这些尝试不仅建立了各种新型的基于2D半导体的光催化剂，而且还提供了对涉及的相关机制的深入理解。本文中，概述了光催化应用中2D半导体开发的最新进展。通过总结对结构表征和光激发过程的研究，我们强调了结构因素与光催化性能之间的关系。特别是讨论了库仑相互作用介导的激子效应对光催化行为的影响。我们通过探索光催化领域二维材料发展的未来挑战和机遇来结束本综述。

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