Magnetic Fe₃O₄@ZIF-67 composites were prepared, characterized, and used as heterogeneous catalysts to activate peroxymonosulfate (PMS) for the degradation of tetrabromobisphenol A (TBBPA). It was observed that all the added TBBPA (40 mg L⁻¹) was completely degraded in 3 min in the Fe₃O₄@ZIF-67 (0.1 g L⁻¹) + PMS (0.1 g L⁻¹) system with a pseudo second-order degradation rate constant (k) of 110.3 L g⁻¹ min⁻¹, being nearly 10 times that (11.8 L g⁻¹ min⁻¹) in the ZIF-67 + PMS system and 2000 times that (0.06 L g⁻¹ min⁻¹) in the Fe₃O₄ + PMS system. The observed synergistic catalysis between Fe₃O₄ and ZIF-67 in Fe₃O₄@ZIF-67 enhanced not only the degradation of TBBPA, but also the TOC removal and the release of Br⁻ during the degradation of TBBPA. Multiple reactive species including •OH, SO₄^•− and ¹O₂ were responsible for the degradation of TBBPA, but ¹O₂ was the dominant one. The synergistic catalytic mechanism of PMS activation by Fe₃O₄@ZIF-67 was proposed, which mainly involved the electron donating ability of Fe²⁺ in Fe₃O₄ for enhancing the Co³⁺/Co²⁺ cycle. Moreover, Fe₃O₄@ZIF-67 showed good recyclability and could be easily recycled by magnetic separation. This work provides an opportunity to construct highly efficient catalysts with magnetic recycling capability.

制备了磁性Fe ₃ O ₄ @ ZIF-67复合材料，对其进行了表征，并将其用作非均相催化剂来活化过氧单硫酸盐（PMS）以降解四溴双酚A（TBBPA）。观察到在Fe ₃ O ₄ @ ZIF-67（0.1 g L ^-1）+ PMS（0.1 g L ^-1）系统中，所有添加的TBBPA（40 mg L ^-1）在3分钟内被完全降解。伪二级降解速率常数（k）为110.3 L g ^-1 min ^-1，几乎是ZIF-67 + PMS系统中（11.8 L g ^-1 min ^-1）的10倍，是（0.06 L g ^-1Fe ₃ O ₄ + PMS系统中的min ^-1）。铁之间所观察到的协同催化₃ ö ₄中Fe和ZIF-67 ₃ ö ₄ @ ZIF-67增强不仅TBBPA的降解，而且去除TOC和Br的释放^- TBBPA的降解期间。包括•OH，SO ₄ ^•-和¹ O ₂在内的多种反应性物质是导致TBBPA降解的原因，而¹ O ₂是主要的降解物质。Fe ₃ O ₄激活PMS的协同催化机理提出了@ ZIF-67，其主要涉及Fe ₃ O ₄中Fe ^2+的给电子能力以增强Co ³⁺ / Co ²⁺循环。而且，Fe ₃ O ₄ @ ZIF-67具有良好的可回收性，并且可以通过磁分离容易地回收。这项工作为构建具有磁性回收能力的高效催化剂提供了机会。