Fe singly anchored onto graphite carbon nitride (Fe-SA/PHCNS) as Fe-N₆ was synthesized to realize efficient peroxymonosulfate (PMS) activation and superior organic pollutant oxidation. The Fe-N₆ was the core catalytic site of activation via forming high-valent iron–oxo species (FeN₆ =O) as the transient reactive intermediate as evidenced by X-ray adsorption fine spectroscopy (XAFS), in-situ Raman spectrum and theoretical calculation. The cycle of Fe-N₆ and FeN₆ =O interconversion was sustainably observed with organic pollutant as the electron-donor and PMS as the electron-acceptor. As results, the equivalent steady state concentration of FeN₆ =O was as high as 2.39 × 10⁻⁸ M and this system exhibited 97.2% average PMS utilization rate. Fe-SA/PHCNS can be immobilized onto carbon felt for the simultaneous filtration and oxidation with stable and efficient performance. This study elucidated the mechanism and superiority of FeN₆ =O mediated oxidation pathway and can advance the research and application of this new approach in advanced oxidation processes.

Fe 单独锚定在石墨氮化碳 (Fe-SA/PHCNS) 上作为Fe-N ₆被合成以实现有效的过硫酸盐 (PMS) 活化和优异的有机污染物氧化。所述FEN ₆经由形成高原子价铁氧物种（是激活的核心催化位点FEN ₆ = O）作为瞬态反应中间体如通过X射线吸附精细光谱（XAFS）证实，原位拉曼光谱和理论计算。Fe-N ₆和FeN ₆ =O 相互转化的循环可持续观察到，有机污染物为电子供体，PMS 为电子受体。结果，等效稳态浓度为FeN ₆ =O 高达 2.39 × 10 ^-8 M，该系统表现出 97.2% 的平均 PMS 利用率。Fe-SA/PHCNS可以固定在碳毡上同时过滤和氧化，性能稳定高效。该研究阐明了FeN ₆ =O 介导的氧化途径的机制和优越性，可以推动这种新途径在高级氧化过程中的研究和应用。