Mishra Bikash, Alam Akhtar, Chakraborty Avanti, Kumbhakar Bidhan, Ghosh Samrat, Pachfule Pradip, Thomas Arne
Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata, 700106, India.
Inorganic and Physical Chemistry Laboratory, Council of Scientific and Industrial Research (CSIR), Central Leather Research Institute (CLRI), Chennai, 600020, India.
Adv Mater. 2024 Dec 9:e2413118. doi: 10.1002/adma.202413118.
The global energy crisis and environmental concerns are driving research into renewable energy and sustainable energy conversion and storage technologies. Solar energy, as an ideal sustainable resource, has significant potential to contribute to the goal of net-zero carbon emissions if effectively harnessed and converted into a reliable and storable form of energy. Photocatalysts have the potential to convert sunlight into chemical energy carriers. In this respect, covalent organic frameworks (COFs) have shown great promise due to their tunable structure on different length scales, high surface areas, and beneficial optical properties such as broad visible light absorption. This review offers a comprehensive overview of the key developments in COF-based photocatalysts for various applications, including water splitting, hydrogen peroxide generation, organic transformations, and carbon dioxide and nitrogen reduction. The underlying mechanisms, essential principles for material design, and structure-function relationships of COFs in various photocatalytic applications are discussed. The challenges faced by COF-based photocatalysts are also summarized and various strategies to enhance their performance are explained, such as improving crystallinity, regulating molecular structures, tailoring linkages, and incorporating cocatalysts. Finally, critical strategies are proposed for the utilization of photocatalytically generated chemicals into value-added products.
全球能源危机和环境问题推动着对可再生能源以及可持续能源转换与存储技术的研究。太阳能作为一种理想的可持续资源，如果能得到有效利用并转化为可靠且可存储的能源形式，对于实现净零碳排放目标具有巨大潜力。光催化剂有将阳光转化为化学能载体的潜力。在这方面，共价有机框架（COF）因其在不同长度尺度上可调控的结构、高比表面积以及诸如宽可见光吸收等有益光学性质而展现出巨大前景。本文综述全面概述了基于COF的光催化剂在各种应用中的关键进展，包括水分解、过氧化氢生成、有机转化以及二氧化碳和氮还原。讨论了COF在各种光催化应用中的潜在机制、材料设计的基本原理以及结构 - 功能关系。还总结了基于COF的光催化剂所面临的挑战，并解释了提高其性能的各种策略，如提高结晶度、调节分子结构、定制连接方式以及引入助催化剂。最后，提出了将光催化产生的化学品转化为增值产品的关键策略。
