Sulfonate-functionalized covalent organic frameworks for capacitive deionization
Dong Jiang, Xingtao Xu, Yoshio Bando, Saad M. Alshehri, Miharu Eguchi, Toru Asahi, Yusuke Yamauchi
Abstract
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.
Topics & Concepts
ChemistryCapacitive deionizationSulfonateCovalent bondCovalent organic frameworkNanotechnologyChemical engineeringInorganic chemistryOrganic chemistrySodiumElectrochemistryElectrodePhysical chemistryEngineeringMaterials scienceMembrane-based Ion Separation TechniquesCovalent Organic Framework Applications