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In this work, we proposed a novel strategy for the photocatalytic degradation of the target pollutants tetracycline (TC) and methylene blue (MB) using core–shell dual metal-organic frameworks (MOFs) composites. A series of mesoporous composites MIL-53@UiO-66 were synthesized by solvent-thermal synthesis via coating UiO-66 on the surface of MIL-53. The results show that under the same degradation conditions, only 30 and 15 min are needed to degrade 93% of TC and 96% of MB in the photo-Fenton reaction system, respectively. The amorphous shell layer brings stronger adsorption to the catalyst. MIL-53@UiO-66 composites with equalizing Fermi level are formed to promote photon absorption and electron transfer. Meanwhile, the MIL-53@UiO-66 composites with excellent stability will be a promising catalyst for environmental remediation.
This research was financially supported by the funds awarded by the National Natural Science Foundation of China (Nos. 21878017 and 51773012). The authors are grateful to the support of this research from the Mass Transfer and Separation Laboratory in Beijing University of Chemical Technology.