Sulfonate-functionalized covalent organic frameworks for capacitive deionization

作者：Dong Jiang, Xingtao Xu, Yoshio Bando, Saad M. Alshehri, Miharu Eguchi, Toru Asahi, Yusuke Yamauchi · 发表于：Bulletin of the Chemical Society of Japan · 年份：2024 · DOI：10.1093/bulcsj/uoae074 · 被引用次数：25 · 研究领域：Membrane-based Ion Separation Techniques、Covalent Organic Framework Applications

Abstract Capacitive deionization is an efficient and cost-effective technology for ion removal from brackish water. Here, we demonstrate a sulfonate-functionalized covalent organic framework as a novel faradaic cathode material for capacitive deionization applications. Due to its orderly arranged adsorption units in the covalent organic framework, the resulting covalent organic framework demonstrates a superior sodium cations removal capacity of 19.56 mg g−1 and a maximum desalination rate of 3.15 mg g−1 s−1 in a 500 ppm NaCl solution at 1.2 V.