Zirconium-metal–organic framework@activated carbon composites for prevention of secondary emission of nerve agents
Metadatos
Afficher la notice complèteAuteur
Perona, Cristina; Borrego Marin, Emilio; Delgado López, Pedro José; Vismara, Rebecca; Rodríguez Maldonado, Carmen; Barea Martínez, Elisa María; Bandosz, Teresa J.; Rodríguez Navarro, Jorge AndrésEditorial
Royal Society of Chemistry
Date
2023-12-04Referencia bibliográfica
Perona, C., Borrego-Marin, E., Delgado, P., Vismara, R., Maldonado, C. R., Barea, E., ... & Navarro, J. A. Zirconium-metal–organic framework@ activated carbon composites for prevention of secondary emission of nerve agents. J. Mater. Chem. A, 2024,12, 1772-1778 [10.1039/d3ta06108f]
Patrocinador
Spanish MCIN/AEI/10.13039/ 501100011033 (Project PID2020-113608RB-I00; TED2021- 129886B-C41); Spanish MCIN/AEI/10.13039/ 501100011033 by PRE2021-099867; Grant PRE2018-084220 funded by Spanish MCIN/AEI/10.13039/ 501100011033 and FSE; Plan Propio de Investigación-Universidad de Granada for a predoctoral fellowship; Plan Propio de Investigación- Universidad de Granada for a Visiting Scholar Grant; Programa Juan de la Cierva Formación (FJC2020- 045043-I)Résumé
We have studied the formation of core–shell hybrid metal–organic framework@activated carbon sphere
(MOF@AC) adsorbents, by means of a layer-by-layer (LBL) growth method of MOFs on shaped AC
materials. The hybrid MOF@AC materials are useful for preventing the secondary emission problems of
chemical warfare agent protective filters. Mesopores on AC materials facilitate carbon surface oxidation
and a subsequent MOF growth, allowing Zr6O4(OH)4(benzene-1,4-dicarboxylate-2-X)6 (X = H, UiO-66; X
= NH2, UiO-66-NH2) thin film formation. By contrast, microporous spheres do not allow a significant
MOF layer growth. The MOF@AC hybrids are able to capture the G-type nerve agent surrogate,
diisopropylfluorophosphate (DIFP), and quantitatively hydrolyse a P–F bond, within 24 h at room
temperature, to yield non-toxic diisopropylphosphate (DIP) in unbuffered moist media. Neither the MOF
nor the carbon spheres alone can hydrolyse the model toxic compound to that extent. The enhanced
performance of the MOF@AC composites is attributed to a synergistic interplay of the hydrolytic
degradation of DIFP at the MOF layer and the physisorption of DIP at the carbon pore structure, allowing
the regeneration of the MOF catalytic sites.