In recent years, metal-organic framework derivatives have been regarded as materials with great potential for water treatment applications. In this study, we employed a polyvinylpyrrolidone (PVP)-assisted copper-cobalt bimetallic zeolitic imidazole framework (ZIF) as a template to rationally design nanosheet-like mixed metal oxide embedded nitrogen-doped carbon (CuCoO-PC). CuCoO-PC exhibited excellent degradation potential towards metronidazole (MNZ) and achieved almost complete degradation within 7 min through the activation of peroxymonosulfate (PMS). Importantly, the introduction of copper into CuCoO-PC established strong interactions between copper and cobalt, accelerating the activation performance of PMS. Furthermore, PVP, rich in nitrogen atoms, formed strong coordination interactions with ZIF precursors, which effectively protected the morphological stability of ZIF at high temperature, preventing collapse and aggregation. Meanwhile, the formation of nitrogen-doped carbon networks provides a pathway for the generation of non-radical. The study found that CuCoO-PC continuously activated PMS, generating various reactive oxygen species (ROS), among which SO₄^•- and ¹O₂ played decisive roles. By calculating the HOMO, LUMO, and Fukui functions, we identified the reactive sites of MNZ and proposed possible degradation pathways. CuCoO-PC demonstrated excellent catalytic performance, reduced toxicity of intermediate products, and good reusability, all of which highlight its enormous potential in practical applications.

近年来，金属有机骨架衍生物被认为是具有巨大水处理应用潜力的材料。在这项研究中，我们采用聚乙烯吡咯烷酮（PVP）辅助的铜钴双金属沸石咪唑骨架（ZIF）作为模板，合理设计纳米片状混合金属氧化物嵌入氮掺杂碳（CuCoO-PC）。CuCoO-PC对甲硝唑（MNZ）表现出优异的降解潜力，并通过过一硫酸盐（PMS）的活化在7分钟内几乎完全降解。重要的是，将铜引入CuCoO-PC中建立了铜和钴之间的强相互作用，加速了PMS的活化性能。此外，富含氮原子的PVP与ZIF前驱体形成强烈的配位相互作用，有效保护了ZIF在高温下的形态稳定性，防止崩解和聚集。同时，氮掺杂碳网络的形成为非自由基的产生提供了途径。研究发现CuCoO-PC不断激活PMS，产生多种活性氧(ROS)，其中SO ₄ ^•-和¹ O ₂起决定性作用。通过计算 HOMO、LUMO 和 Fukui 函数，我们确定了 MNZ 的反应位点并提出了可能的降解途径。CuCoO-PC表现出优异的催化性能、降低的中间产物毒性以及良好的可重复使用性，这些都凸显了其在实际应用中的巨大潜力。