Constructing Asymmetric Cu–O V –Mn Sites on MOFs‐Derived Cu‐MnO x Microspheres With Abundant Oxygen Vacancies for Enhanced Photothermal VOC Degradation

With the growing severity of volatile organic compounds (VOCs) pollution, metal‐organic frameworks (MOFs)‐derived materials offer a promising solution through efficient photothermal catalysis. In this paper, M‐MnO x (M = Cu, Ni, Co, Fe) catalysts derived from manganese‐based MOFs were successfully prepared by the sacrificial template method and applied for the catalytic degradation of typical VOCs (ethyl acetate, heptane, and hexanal) in cooking fumes. Under simulated solar irradiation (32.6 mW cm −2 ), Cu‐MnO x exhibited the highest catalytic activity, and the ethyl acetate, heptane, and hexanal conversions reached 93%, 94%, and 91%, respectively. Advanced characterization results verified that the excellent catalytic performances of Cu‐MnO x can be attributed to the presence of asymmetric Cu–O V –Mn bimetallic sites and abundant oxygen vacancies (O V ), thereby promoting the activation of oxygen species and light absorption capacity. In addition, the in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) studies showed that Cu‐MnO x established an efficient synergistic oxidation system through its Cu–O V –Mn sites, driven by photogenerated reactive oxygen species and photothermal effects. This system promoted the rapid conversion and deep oxidation of surface intermediates, ensuring superior degradation efficiency compared with pure MnO x . This work provides a new catalytic purification strategy with high efficiency and low energy consumption for solving the VOC degradation in cooking oil fume.