Abstract
Great disparity in crystal size and incompatibility in crystal interface of catalysts lead to low catalytic activity, restricting its application for antibiotic degradation. Herein, a dual regulation strategy via intrinsic ion interpenetration was proposed to engineer multifunctional nano-interfacial BiFeVO4/NH2-MIL-88B(Fe-Bi) (BFV/NMFB) catalysts for efficient photo-Fenton-like catalytic degradation OTC. These multifunctional nano-interfaces (Fe-O-Bi) with abundant vacancy defects enhanced electrical conductivity, broadened light absorption and narrowed band gap. Furthermore, the strong interface bonds enhanced H2O2 adsorption and activation, accelerated photogenerated carrier separation/transfer and promoted Fe3+/Fe2+ redox activity. These properties gave an excellent synergistic effect of photo and Fenton-like catalysis (synergy factor up to 4.6) via changing photocurrent transfer pathway and interfacial adsorption-activation mechanism. Therefore, the designed BFV/NMFB exhibited superior photo-Fenton-like catalytic activity (ka = 189 mol‧mg−1‧min−1), about 3.6–58 times higher than these of reported catalysts. The proposed strategy provided a promising method for the design of MOFs composition for application of antibiotic degradation.
Published Version
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