Peroxymonosulfate-based advanced oxidation processes (PMS-AOPs) are promising trend for degrading of toxic organic pollutants. In this work, the novel 0D-2D-3D nanoarchitectonics (sandwich structure) are fabricated as advanced catalysts for PMS-AOPs. The distinctive sandwich structure of ZIF-67-AG-CA allows for the complete exposure of the active sites of ZIF-67, which can effectively activate PMS to generate both radical and non-radical species for the degradation of organic pollutants. Furthermore, the nano-reactive sites are distributed uniformly in layers, which provides additional PMS adsorption sites and enhances the efficiency of the catalytic reaction. Consequently, ZIF-67-AG-CA was observed to exhibit an excellent performance in the removal of organic pollutants by activating PMS, achieving a 99% degradation of 4-NP in 60 min and demonstrating good cycling stability through cycling experiments. Furthermore, quenching experiments and EPR demonstrated that SO42− and O2− radicals were involved in a synergistic manner in the catalytic reaction process with 1O2 non-radicals during the catalytic process.

中文翻译：

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基于 MOF 的 0D-2D-3D 纳米结构学作为过氧一硫酸盐活化的催化转化器


基于过氧一硫酸盐的高级氧化过程 （PMS-AOPs） 是降解有毒有机污染物的有前途的趋势。在这项工作中，制造了新颖的 0D-2D-3D 纳米结构学 （三明治结构） 作为 PMS-AOPs 的先进催化剂。ZIF-67-AG-CA 独特的夹心结构允许 ZIF-67 的活性位点完全暴露，从而可以有效激活 PMS 产生自由基和非自由基物种，用于降解有机污染物。此外，纳米反应位点均匀分布在层中，这提供了额外的 PMS 吸附位点并提高了催化反应的效率。因此，观察到 ZIF-67-AG-CA 通过激活 PMS 去除有机污染物表现出优异的性能，在 60 分钟内实现 4-NP 的 99% 降解，并通过循环实验表现出良好的循环稳定性。此外，淬灭实验和 EPR 表明，SO42 - 和 O 2 - 自由基在催化反应过程中与 1O2 非自由基协同参与。