Efficient Removal of Organic Dyes from Water by β‐Cyclodextrin Functionalized Graphite Carbon Nitride Composite

Abstract To develop a high efficient organic wastewater treatment material with the advantages of quick separation of pollutants and low environmental impact, this work reported a novel β‐cyclodextrin (β‐CD) functionalized g‐C 3 N 4 composite (β‐CD/g‐C 3 N 4 ) with integration of dual‐function of microfiltration and visible‐light driven photocatalytic degradation. The organic dye removal performance of the β‐CD/g‐C 3 N 4 composite was investigated using methyl blue (MB) as a target pollutant for the first time. Furthermore, the mechanism of photocatalytic activity enhancement for the β‐CD/g‐C 3 N 4 composite wasalso probed. The β‐CD/g‐C 3 N 4 composite exhibited a significantly enlarged adsorption capacity and enhanced visible‐light driven photocatalytic activity in degrading MB compared with the pristine g‐C 3 N 4 solely. Importantly, the β‐CD/g‐C 3 N 4 composite filter membrane could be large‐scale prepared and recycled several times with no loss in microfiltration and photodegradation performances. This work gives insight to the effective integration of microfiltration and photodegradation for the improvement of performance in organic wastewater treatment.