Progress in the synthesis of ionic covalent organic frameworks and their application in environmental remediation
Ionic covalent organic frameworks(iCOFs)are a kind of covalent organic framework containing ionic groups in the structural framework or microporous channels.In addition to the advantages of low density,tunable pore structure,large specific surface area,excellent thermal and chemical stability,etc.,iCOFs can be combined with opposite charged groups,so as to exhibit great applications in proton conduction,catalysis,biomedicine and other fields.Especially in the field of environmental remediation,iCOF have been widely used in the removal of organic contaminants,radionuclides and heavy metal ions.In this review,the structure,the synthesis methods and the application of iCOF in environmental pollutants have been discussed and especially,the underlying removal mechanism has been highlighted.Finally,the opportunities and challenges of iCOFs in environmental remediation were analyzed in detail to understand their future developing prospects.
ionic covalent organic frameworkadsorptionorganic pollutantsradionuclideheavy metal ions