A review on the adsorption of organic pollutants by covalent organic frameworks(COFs)from environmental remediation
Covalent organic frameworks(COFs)are a class of newly developed porous crystal materials with periodic order composed of light elements via strong covalent bonds.It has broad application prospect as a promising material for the elimination of various organic pollutants due to their large specific surface area,adjustable pores,abundant active functional groups,high thermal stability and recyclability.Hence,this review highlighted the recent progress and advances of the adsorption and removal of organic pollutants such as drugs,pesticides,dyes and industrial by-product by five different types of COFs(nitrogen bond,ionic type,grafting functional group,chiral and complex functionalization).Firstly,the effective path of COFs to capture pollutants was revealed from the perspectives of COFs topological structure and pore wall chemical environment,and the adsorption mechanism was discussed.Then,the specific synthetic paths and adsorption effects of different types of COFs were analyzed,and the corresponding performance parameters were briefly summarized.Finally,some suggestions were provided for industrial mass production of COFs in the field of environmental remediation,and the challenges of"bottom-up"and"post-synthesis"strategies in regulating the efficient adsorption and specific selection of COFs were summarized.It was also pointed out that it was still a long way to obtain good performance COFs based on structure-activity combination thinking.
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维普
