In the advanced oxidation processes (AOPs), the degradation of organic pollutants by the oxidation of reactive oxygen species (ROS) from the interaction between H2O2 and active species Fe2+/Fe3+ has gained significant attention. The cycle of Fe2+/Fe3+ in the catalytic oxidation plays a key role. Herein, a kind of N-doped carbon encapsulated FeMoxOy nanocrystallines (FeMo@NC) was fabricated by precipitation-calcination approach and applied to degrade organic pollutants in the AOPs. The composite catalyst presents efficient catalytic activity for removing Rhodamine B (RhB), Methylene blue (MB), Congo red (CR) and Methyl orange (MO). The facilitating effect of Mo to Fe2+/Fe3+ cycle and phase structure and composition of the catalyst on the degradation was explored. Meanwhile, the recovery and reusability of the catalyst were assessed, proving its excellent stability in the degradation process. Quenching experiments demonstrate that the catalyst can activate H2O2 to generate singlet oxygen (1O2) that serves as the main ROS to degrade RhB, the degradation pathway and mechanism is then proposed.

中文翻译：

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N-掺杂碳封装的 FeMoxOy 纳米颗粒可通过氧化 H2O2 产生的 1O2 有效去除罗丹明 B


在高级氧化过程（AOP）中，H2O2 与活性物质 Fe2+/Fe3+ 之间的相互作用氧化活性氧（ROS）来降解有机污染物引起了人们的广泛关注。 Fe2+/Fe3+循环在催化氧化中起着关键作用。在此，通过沉淀-煅烧方法制备了一种氮掺杂碳封装的FeMoxOy纳米晶（FeMo@NC），并将其用于降解AOP中的有机污染物。该复合催化剂对去除罗丹明B（RhB）、亚甲基蓝（MB）、刚果红（CR）和甲基橙（MO）具有高效的催化活性。探讨了Mo对Fe2+/Fe3+循环以及催化剂的相结构和组成对降解的促进作用。同时，对催化剂的回收和重复使用进行了评估，证明其在降解过程中具有优异的稳定性。淬火实验表明，该催化剂可以活化H2O2生成单线态氧（1O2），作为主要ROS降解RhB，并提出了降解途径和机制。