Simultaneous regulation of electronic environment of active sites and engineering architectures with efficient exposed active sites are crucial to realize efficient persulfate activation for pollutants degradation, which remains a great challenge. This study demonstrated an ingenious platform of 0D/3D nanofibrous N-enriched carbon hybrid with incorporated ultrafine metal oxide quantum dots (QDs, ≈ 3 nm) with abundant oxygen vacancies that enabled efficient PDS activation for pollutants degradation via integrating electron density regulation and morphology modulation. The favorable structure configuration and intimate coupling action between QDs and N-doped carbon matrix promoted PDS activation on the surface of Fe₃O₄ QDs@NC and simultaneously modified pollutant absorption property towards catalyst, synergistically resulting in excellent TC degradation efficiency. More importantly, electron-rich Fe sites derived from electron redistribution and highly-conductive N-doped carbon matrix synergistically directed PDS activation by non-radical pathway with generation of ¹O₂. This work provides a fresh insight into improving persulfate activation by engineering architectures and regulating local electronic density of multiple active sites.

同时调节活性位点的电子环境和具有有效暴露活性位点的工程结构对于实现有效的过硫酸盐活化以降解污染物至关重要，这仍然是一个巨大的挑战。这项研究展示了一个巧妙的 0D/3D 纳米纤维富 N 碳杂化平台，其中包含具有丰富氧空位的超细金属氧化物量子点（QD，≈ 3 nm），通过集成电子密度调节和形态调制，能够有效激活 PDS 以降解污染物. _{QDs 与 N 掺杂碳基质之间有利的结构配置和紧密的耦合作用促进了 Fe 3} O ₄表面的 PDS 活化QDs@NC 同时改变催化剂对污染物的吸收性能，协同产生优异的 TC 降解效率。更重要的是，源自电子再分布和高导电性 N 掺杂碳基质的富电子 Fe 位点通过非自由基途径协同定向 PDS 活化并生成¹ O ₂。这项工作为通过工程架构改善过硫酸盐活化和调节多个活性位点的局部电子密度提供了新的见解。