Luo Cai-Wu, Cai Lei, Xie Chao, Wu Jing, Jiang Tian-Jiao
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences 100085 China
School of Resource Environmental and Safety Engineering, University of South China 421000 China.
RSC Adv. 2023 Mar 17;13(13):8720-8735. doi: 10.1039/d3ra00707c. eCollection 2023 Mar 14.
The FeMoS catalyst for activating peroxymonosulfate (PMS) is a promising pathway for removing organic pollutants in wastewater, however, the dominant FeS phases and sulfur (S) vacancies in it are little involved. Herein, for the first time, novel bimetallic FeMoS microparticles were synthesized by a simple method and then applied for PMS activation for degrading organic pollutants. The catalysts were characterized by several techniques, including X-ray diffraction and X-ray photoelectron spectroscopies. The results revealed that new FeMoS microparticles containing S vacancies in the main FeS phases were obtained. FeS and S vacancies were found to play important roles for activating PMS by radical and nonradical pathways. More Fe and Mo were formed in the presence of S vacancies, which offered a new strategy for exploring novel heterogeneous catalysts in the activation of PMS for environmental remediation.
用于活化过一硫酸盐（PMS）的FeMoS催化剂是去除废水中有机污染物的一种很有前景的途径，然而，其中占主导地位的FeS相和硫（S）空位却很少被涉及。在此，首次通过一种简单的方法合成了新型双金属FeMoS微粒，然后将其应用于活化PMS以降解有机污染物。通过多种技术对催化剂进行了表征，包括X射线衍射和X射线光电子能谱。结果表明，获得了在主要FeS相中含有S空位的新型FeMoS微粒。发现FeS和S空位通过自由基和非自由基途径在活化PMS中起重要作用。在S空位存在的情况下形成了更多的Fe和Mo，这为探索用于环境修复的PMS活化新型非均相催化剂提供了一种新策略。
