State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
Sci Total Environ. 2021 Aug 20;783:146838. doi: 10.1016/j.scitotenv.2021.146838. Epub 2021 Mar 31.
Covalent organic frameworks (COFs) have attracted extensive attention due to their low density, adjustable structure, functionalization, and good stability. This paper systematically and comprehensively describes to qualitatively and quantitatively the progress, trends, and hotspots of COFs in the environmental and energy fields from the perspective of bibliometrics. Herein, based on the Web of Science database, a total of 2589 articles from 2005 to October 6, 2020, were collected. Thereafter, co-occurrence, co-citation analysis, and cluster analysis were conducted using CiteSpace and VOSviewer software. The results indicated that COFs research shows the characteristics of rapid growth. The active countries were mainly USA, Germany, Japan, China, and India. More than half of the top 20 active institutions were from China. The research hotspots in this field were systematically elaborated, including synthesis, adsorption, catalysis, membrane, sensor, and energy storage. Research has shown that various COFs are reasonably designed, synthesized, and used in different applications. For example, when COFs are used for photocatalysis, groups containing photocatalytic active sites are integrated into COFs to improve photocatalytic activity. Finally, some challenges were proposed, that are beneficial to the rapid and balanced development of the COFs field. For instance, the preparation methods still need to be further improved for mass production and there is an imbalance in environmental applications such as fewer sensor and membrane applications. We believe that this study provides a comprehensive and systematic overview of the environmental and energy applications of COFs for future investigations.
共价有机框架（COFs）由于其低密度、可调节的结构、功能化和良好的稳定性而受到广泛关注。本文从文献计量学的角度，系统全面地描述了 COFs 在环境和能源领域的进展、趋势和热点，定性和定量地进行了分析。在此基础上，基于 Web of Science 数据库，共收集了 2005 年至 2020 年 10 月 6 日的 2589 篇文章。然后，使用 CiteSpace 和 VOSviewer 软件对共现、共被引分析和聚类分析进行了分析。结果表明，COFs 研究呈现出快速增长的特点。活跃的国家主要有美国、德国、日本、中国和印度。排名前 20 的活跃机构中，有一半以上来自中国。系统地阐述了该领域的研究热点，包括合成、吸附、催化、膜、传感器和储能。研究表明，各种 COFs 被合理设计、合成并应用于不同的应用中。例如，当 COFs 用于光催化时，将含有光催化活性位点的基团整合到 COFs 中，以提高光催化活性。最后，提出了一些挑战，这有利于 COFs 领域的快速和平衡发展。例如，制备方法仍需进一步改进，以实现大规模生产，并且在环境应用方面存在不平衡，传感器和膜应用较少。我们相信，这项研究为 COFs 在环境和能源领域的应用提供了一个全面而系统的概述，有助于未来的研究。
