Nanoconfined heterogeneous catalysis triggered by copper oxide supported metal–organic framework UiO-66-NH2/peroxymonosulfate for rapidly removing bisphenol A in water

CuO@UiO-66-NH 2 was constructed using a hydrothermal method and used for the enhanced peroxymonosulfate (PMS) activation and bisphenol A (BPA) degradation. The results showed that under the optimal conditions, the degradation rate of BPA (6 mg/L) was 95.08%, and the leaching amount of copper ions was 0.42 mg/L. After five cycles, the degradation rate of the catalyst still exceeded 90%, indicating that the catalyst has good stability. Through quenching experiments, CuO@UiO-66-NH 2 /PMS catalytic system includes both free radical and non-free radical pathways, among which the non-free radical 1 O 2 is the main reactive oxygen species for degrading BPA. The intermediate of the reaction was identified through liquid chromatography-mass spectrometry (LC–MS) in the experiment, and the degradation mechanism and pathway of the catalyst were proposed.