Functionalized cyclodextrin metal‐organic framework materials with excellent photocatalytic performance for removal of organic dyes from water

Driven by the global water crisis, the necessity for wastewater treatment has become more important than ever. Herein, γ-cyclodextrin metal-organic frameworks (CD-MOF) generated by solvent diffusion method serve as a carrier, and glycol glycidyl ether acts as the cross-linking agent, Crosslinked-CD-MOF (CCM) has been successfully designed. Benefiting from tunable size and fine water stability, CCM used as a framework allows ZnO for a large-area space loading. The resultant ZnO/CCM exhibits well-defined shapes, a narrower band gap, excellent chemical stability, and photocatalytic performance for dye removal. Apart from that, the antibacterial activity was further explored. The study confirmed that ZnO/CCM-3 could degrade above 93% methylene blue (MB) under ultraviolet or visible light irradiation, particularly in five cyclic tests. This straightforward yet general approach offers potential applications for CD-MOF-based materials in sewage remediation.