The efficient mineralization of phenol and its derivatives in wastewater remains a great challenge. In this study, the bimetallic CuCeO-BTC was screened from a series of MOFs-derived MCeO-BTC (M = La, Cu, Co, Fe, and Mn) catalysts, and the influence of the Cu/Ce ratio on phenol removal by catalytic ozonation was carefully examined. The results indicate that CuCeO-BTC was the best among the CuCeO-BTC (x = 0, 1, 2, and 3) catalysts, with a phenol mineralization efficiency reaching close to 100 % within 200 min, approximately 30.1 % higher than CeO-BTC/O and 70.3 % higher than O alone. The order of mineralization efficiency of phenol was CuCeO-BTC > CuCeO-BTC > CuCeO-BTC > CeO-BTC. CeO-BTC exhibited a broccoli-like morphology, and CuCeO-BTC (x = 1, 2, and 3) exhibited an urchin-like morphology. Compared with CuCeO-BTC (x = 0, 1, and 3), CuCeO-BTC exhibited a larger specific surface area and pore volume. This characteristic contributed to the availability of more active sites for phenol degradation. The redox ability was greatly enhanced as well. Besides, the surface of CuCeO-BTC exhibited a higher concentration of Ce species and hydroxyl groups, which facilitated the dissociation of ozone and the generation of active radicals. Based on the results of radical quenching experiments and the intermediates detected by LC-MS, a potential mechanism for phenol degradation in the CuCeO-BTC/O system was postulated. This study offers novel perspectives on the advancement of MOFs-derived catalysts for achieving the complete mineralization of phenol in wastewater through catalytic ozonation.
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