Fenton/photo-Fenton reaction was limited by slow Fe/Fe cycle, low HO activation efficiency, and narrow applicable pH range. Here, Fe atoms doped MoS (Fe–MoS) with abundant of low-valence Mo (0 < δ < 4) was prepared. Benefiting from the powerful reduction capacity of Mo, the rate-limiting step of Fe reduction was significantly accelerated. Nearly 100% of HO utilization efficiency was realized. Importantly, 90% of HO was effectively activated to be OH. As a result, tetracycline degradation rate in photo-Fenton reaction catalyzed by Fe–MoS was 5.8 and 4.2 times higher than those of MoS and Fe–MoS-Hyd (prepared by hydrothermal reaction). In comparison with MoS and Fe–MoS-Hyd whose efficient work range were limited in acidic condition, Fe–MoS was a pH-universal catalyst (pH = 2.6–14.0) by taking advantage of the exposed Mo and photoinduced electrons, largely improving the environmental tolerance. This work simultaneously addressed three bottlenecks in Fenton/photo-Fenton reaction, and provided a new strategy for the preparation of catalysts with powerful catalytic performance and high environmental adaptability.

中文翻译：

---

在MoS2表面设计低价Moδ+（0<4）位点：加速Fe3+/Fe2+循环，最大化H2O2活化效率，并扩展光芬顿反应中适用的pH范围

Fenton/photo-Fenton 反应受到 Fe/Fe 循环缓慢、H2O 活化效率低和适用 pH 范围窄的限制。在这里，制备了富含低价 Mo (0 < δ < 4) 的 Fe 原子掺杂 MoS (Fe-MoS)。受益于Mo强大的还原能力，Fe还原的限速步骤明显加快。实现了H2O利用效率接近100%。重要的是，90% 的 H2O 被有效活化为 OH。结果表明，Fe-MoS催化的光芬顿反应中四环素的降解率比MoS和Fe-MoS-Hyd（水热反应制备）高5.8和4.2倍。与在酸性条件下有效工作范围有限的MoS和Fe-MoS-Hyd相比，Fe-MoS是一种pH通用催化剂（pH = 2.6-14.0），利用暴露的Mo和光生电子，大大提高了催化剂的催化效率。环境耐受性。该工作同时解决了Fenton/光芬顿反应的三大瓶颈，为制备具有强大催化性能和高环境适应性的催化剂提供了新策略。