Trimetallic MOF–derived Fe–Mn–Sn oxide heterostructure enabling exceptional catalytic degradation of organic pollutants

• Published in: Journal of colloid and interface science Vol. 679; no. Pt B; pp. 232 - 244
• Main Authors: Li, Anqi, Yang, Yu, Bai, Xuening, Bao, Hebin, He, Miao, Zeng, Xuzhong, Wang, Yejin, Li, Fang, Qin, Shijiang, Yang, Wenjing, Li, Xueming
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.02.2025
• Subjects: Bisphenol A degradation; Fe2O3/Fe3O4/Mn3O4/SnO2 heterostructure composite; Peroxymonosulfate activation; Radical and non-radical pathway; Bisphenol A degradation; Fe2O3/Fe3O4/Mn3O4/SnO2 heterostructure composite; Radical and non-radical pathway; Peroxymonosulfate activation; FeO/FeO/MnO/SnO heterostructure composite
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2024.10.098

[Display omitted] •Fe–Mn–Sn oxide heterostructure was synthesized via impregnation–calcination method.•The optimized Fe–Mn–Sn oxide/PMS can degrade 100% Bisphenol A within 1 min.•Trimetallic MOF–derived Fe–Mn–Sn oxide heterostructure is more susceptible to promote PMS activation.•DFT calculations explored the mechanism of catalyst-PMS interaction at the interfacial structure. Developing efficient and environmentally benign heterogeneous catalysts that activate peroxymonosulfate (PMS) for the degradation of persistent organic contaminants remains a challenge. Metal–organic frameworks (MOFs)–derived metal oxide catalysts in advanced oxidation processes (AOPs) have received considerable attention research fraternity. Herein, we report an innovative magnetic trimetallic MOF-derived Fe-Mn-Sn oxide heterostructure (FeMnO@Sn) with adjustable morphology, size and Sn content, prepared through an impregnation–calcination strategy. The formation of a novel magnetic Fe2O3/Fe3O4/Mn3O4 heterostructure induces the generation of abundant Fe2+ and Mn2+ sites on the FeMnO@Sn surface. Meanwhile, the introduction of SnO2 into the Fe2O3/Fe3O4/Mn3O4 heterostructure facilitates the cleavage of the OO bond in adsorbed PMS. The synergy among the different functionalities of each metal oxide plays a vital role in the swift and effective degradation of pollutants. In addition, the uniquely designed catalyst exhibits magnetic properties that facilitate easy recycling and repeated use, thereby meeting environmental protection requirements. Overall, this research highlights the design of heterogeneous catalysts for the effective activation of PMS and provides valuable insights for the advancement of future environmental catalysts.