Construction of hydrophilic covalent organic frameworks and their fast and efficient adsorption of cationic dyes from aqueous solution

TFPB-Pa-SO 3 H COF and TFPB-BDSA COF were synthesized and showed fast adsorption of MLB (1 and 2 min) and high adsorption uptakes of CV (1559 and 1288 mg g −1 ). TFPB-Pa-SO 3 H COF as adsorbing material was used for the removal of dye molecules in real water samples.