上海科技大学知识管理系统

The development of immobilized photocatalysts on flexible materials is an attractive method for addressing catalyst recovery and agglomeration problems in water purification. Herein, a durable immobilization strategy was developed to fabricate photocatalytic cotton fabrics with graphitic carbon nitride (g-C3N4) by cross-linking solid N,N′-methylene bisacrylamide (MBA) via electron beam (EB) irradiation. The g-C3N4 was anchored onto the cotton by MBA through cross-linked network, code as g-C3N4-Cot. The g-C3N4-Cot exhibited excellent photocatalytic degradation activity for ofloxacin (OFX) after 60 accelerated laundering cycles. At the same time, the coated g-C3N4 and cross-linked MBA could protect the surface of cotton cellulose from the destruction of radicals. Even after 60 min of ultrasonic treatment, the mass fraction of g-C3N4 leached from g-C3N4-Cot-1 was only 5 wt%. The immobilized g-C3N4 photocatalytic coating can be also applicable for the degradation of other typical organic contaminants. Furthermore, the ·O2− species played critical role during the degradation process. Hence, EB cross-linking provides an alternative method for constructing efficient and stable photocatalytic materials, which have great potential for application in wastewater purification. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer Nature B.V.