Issue 3, 2024

Zirconium-metal–organic framework@activated carbon composites for prevention of secondary emission of nerve agents

Abstract

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.

Graphical abstract: Zirconium-metal–organic framework@activated carbon composites for prevention of secondary emission of nerve agents

Supplementary files

Article information

Article type
Paper
Submitted
08 10 2023
Accepted
04 12 2023
First published
04 12 2023
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. A, 2024,12, 1772-1778

Zirconium-metal–organic framework@activated carbon composites for prevention of secondary emission of nerve agents

C. Perona, E. Borrego-Marin, P. Delgado, R. Vismara, C. R. Maldonado, E. Barea, T. J. Bandosz and J. A. R. Navarro, J. Mater. Chem. A, 2024, 12, 1772 DOI: 10.1039/D3TA06108F

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