In this study, zeolitic imidazolate framework-67 (ZIF-67) derived Co₃O₄/NiCo₂O₄ double-shelled nanocages (DSNCs) were fabricated and utilized as catalysts to activate peroxydisulfate (PDS) for bisphenol A (BPA) degradation. The results showed that Co₃O₄/NiCo₂O₄ DSNCs exhibited superior BPA degradation performance over Co₃O₄ NCs and NiCo₂O₄ NCs. PDS combined with the interfaces of both the Co₃O₄ inner shell and NiCo₂O₄ outer shell to form complex, inducing the nonradical oxidation of BPA by electron abstraction. The double-shelled hollow structure helped to increase the instantaneous concentration of reactants in the void space of Co₃O₄/NiCo₂O₄ DSNCs, thus promoting the decomposition of BPA. The Co₃O₄/NiCo₂O₄ DSNCs had high selectivity for BPA degradation and were resistant to halogens and background organic matter in wastewater. Our work indicated that metal-organic framework (MOF)-derived nanomaterials with a hollow structure have a promising application prospect for persulfate-based advanced oxidation technology.

在这项研究中，制备了由沸石咪唑盐构架67（ZIF-67）衍生的Co ₃ O ₄ / NiCo ₂ O ₄双壳纳米笼（DSNC），并用作催化剂来活化过氧化二硫酸盐（PDS）以降解双酚A（BPA） 。结果表明，Co ₃ O ₄ / NiCo ₂ O ₄ DSNCs表现出比Co ₃ O ₄ NCs和NiCo ₂ O ₄ NCs更好的BPA降解性能。PDS结合了Co ₃ O ₄内壳和NiCo ₂ O ₄的界面外壳形成络合物，通过电子提取诱导BPA的非自由基氧化。双壳中空结构有助于增加Co ₃ O ₄ / NiCo ₂ O ₄ DSNCs空隙空间中反应物的瞬时浓度，从而促进了BPA的分解。Co ₃ O ₄ / NiCo ₂ O ₄ DSNC对BPA的降解具有很高的选择性，并且对废水中的卤素和背景有机物具有抵抗力。我们的工作表明，具有空心结构的金属-有机骨架（MOF）衍生的纳米材料在基于过硫酸盐的高级氧化技术方面具有广阔的应用前景。