The iron-based materials are commonly applied as catalysts in the advanced oxidation processes since they have high-activity and are pollution-free to the environment. How to minimize the continuous depletion of Fe and maintain high-activity is now a hot issue. Herein, a FeOOH@MoS catalyst was prepared to activate peroxymonosulfate to efficiently degrade Atrazine (ATZ). The results showed that FeOOH@MoS exhibits excellent catalytic activity allowing ATZ to be degraded by up to 97.90 % in 60 min. On the one hand, the Fe in FeOOH can efficiently activate the PMS to generate active species to degrade the ATZ, on the other hand, MoS accelerates the reduction of the generated Fe to Fe, allowing FeOOH@MoS to maintain high activity. Radical quenching and electron paramagnetic resonance (EPR) tests show that •OH and sulphate radical played predominant roles in the advanced oxidation process. FeOOH@MoS catalyst showed a good stability, with only a 10.1 % decrease in ATZ degradation after 5 cycles. This work provides a new strategy to fabricate iron-based catalysts for more efficiency in PMS activation.

中文翻译：

---

FeOOH@MoS2过一硫酸盐活化快速催化降解莠去津的机理研究


铁基材料因其活性高、对环境无污染而常被用作高级氧化过程中的催化剂。如何最大限度地减少Fe的持续损耗并保持高活性是目前的热点问题。在此，制备了 FeOOH@MoS 催化剂来活化过一硫酸盐以有效降解莠去津（ATZ）。结果表明，FeOOH@MoS表现出优异的催化活性，使ATZ在60分钟内降解高达97.90%。一方面，FeOOH中的Fe可以有效激活PMS产生活性物种降解ATZ，另一方面MoS加速生成的Fe还原为Fe，使FeOOH@MoS保持高活性。自由基猝灭和电子顺磁共振（EPR）测试表明·OH和硫酸根在高级氧化过程中起主导作用。 FeOOH@MoS催化剂表现出良好的稳定性，5次循环后ATZ降解仅下降10.1%。这项工作提供了一种制造铁基催化剂以提高 PMS 活化效率的新策略。