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Cyclodextrin plays a positive role in water treatment due to its hydrophobic cavity that can capture organic pollutants. However, non-porous cyclodextrin polymers prepared by crosslinking with flexible crosslinking agents have low surface area and slow removal rate for pollutants that limits their application in water treatment. Porous cyclodextrin polymers have gained widespread attention in the past decade due to their high specific surface area and mesoporous pore size (1.8–3.5 nm) similar to activated carbon, and can rapidly remove mixed organic micropollutants from water. Here, the research progress of porous cyclodextrin polymers in the past decade was reviewed from preparation, classification, performance improvement and application. The strategies for improving the adsorption performance of porous cyclodextrin polymers from the aspects of pore size, charge, hydrophilicity/hydrophobicity, functional additives, magnetism, photocatalysis, etc. were emphasized.
Recent crosslinking agents used in the preparation of hypercrosslinked cyclodextrin polymers. (a) Flexible crosslinking agent. (b) Rigid crosslinking agent.
Yanfei He, Yongli Shi, Linji Li, Zhaoxin Zhang, Ningning Cao, Liman Zhang, Yurong Zhang, Kai Zhang (2025) Recent progress on the porous cyclodextrin polymers in water treatment. Coordination Chemistry Reviews 541, 216826. https://doi.org/10.1016/j.ccr.2025.216826