Layer-by-Layer Fabrication of Core–Shell Fe3O4@UiO-66-NH2 with High Catalytic Reactivity toward the Hydrolysis of Chemical Warfare Agent Simulants

• DOI: 10.1021/acsami.9b14099
• Publication Date: 2019-10-25T17:15:51Z
• Authors: Rui Chen; Cheng-an Tao; Zenghui Zhang; Xianzhe Chen; Zhuoliang Liu; Jianfang Wang
• Keywords: Chemical Stability; Reactivity; Magnetism

Detoxifying materials against chemical warfare agents (CWAs) and their simulants are highly desired for proper handling of contamination by destruction CWAs. Herein, we report a facile layer-by-layer fabrication core-shell Fe3O4@UiO-66-NH2 its application in fast degradation CWA simulants. The composite was prepared through epitaxial growth strategy, alternately immersing Fe3O4 nanoparticles ethanol solutions metal node [Zr6O4(OH)4]12+ precursor organic linkers [NH2-BDC, 2-aminoterephthalic acid], respectively, separating using magnet. As confirmed characterization results, the composites with 24.4 μmol/g Zr6 content showed well-defined structure as well good thermal stability. These magnetic metal-organic frameworks (MOFs) were further tested catalytic hydrolysis dimethyl-4-nitrophenyl phosphate (a nerve agent simulant) demonstrated 36 times higher activity than UiO-66-NH2 powder due to defective surface, high percentage MOFs on rich mesoporous structure. Since magnetism retained after coating MOFs, could be easily recovered reused catalysis.