Cu(II) doped mesoporous MnO₂ (Cu-MnO₂) was prepared to establish an intimate functional link between the structure substitution and catalytic peroxymonosulfate (PMS) activation. Based on the characterization of powder X-ray diffraction (XRD), N₂ adsorption-desorption measurement, scanning electron microscope (FE-SEM) and transmission electron microscope (TEM), Cu-MnO₂ had a typical long range ordered mesoporous structure and Cu was successfully introduced in octahedral framework. It exhibited excellent catalytic activity and stability for the phenol degradation by PMS. Phenol was always efficiently degraded over Cu-MnO₂ at a pH range of 3.5 to 9.0. For example, the reaction rate constant at pH 7.0 was 0.073 min^-1, which was two times higher than that of MnO₂ (0.039 min^-1). Importantly, ¹O₂ was identified as the primary reactive species in Cu-MnO₂/PMS system. X-ray photoelectron spectroscopy (XPS) confirmed that more exposed surface oxygen defects due to Cu doping were responsible to the enhancement of PMS activation for phenol degradation. The results of PMS decomposition and oxygen evolution indicated that surface oxygen defects lower the reaction energy barrier of PMS decomposition by generating ¹O₂ via the energy trapping by oxygen. Finally, the heterogeneous PMS activation mechanism over Cu-MnO₂ was proposed.

制备了Cu（II）掺杂的介孔MnO ₂（Cu-MnO ₂），以在结构取代和催化过氧单硫酸盐（PMS）活化之间建立密切的功能联系。基于粉末X射线衍射（XRD），N ₂吸附-脱附测量，扫描电子显微镜（FE-SEM）和透射电子显微镜（TEM）的表征，Cu-MnO ₂具有典型的长程有序介孔结构，并且铜成功地引入了八面体框架。它对PMS降解苯酚表现出优异的催化活性和稳定性。苯酚总是比Cu-MnO ₂有效降解在3.5至9.0的pH范围内。例如，pH 7.0下的反应速率常数为0.073 min ^-1，是MnO ₂（0.039 min ^-1）的两倍。重要的是，在Cu-MnO ₂ / PMS系统中，¹ O ₂被确定为主要反应物种。X射线光电子能谱（XPS）证实，由于Cu掺杂而导致的更多暴露的表面氧缺陷与PMS活化促进苯酚降解有关。PMS分解和析出氧的结果表明，表面氧缺陷通过生成¹ O ₂降低了PMS分解的反应能垒。通过氧气的能量捕获。最后，提出了Cu-MnO _2上异质的PMS活化机理。