Ultra‐Fast Degradation of Chemical Warfare Agents Using MOF–Nanofiber Kebabs

Abstract

The threat associated with chemical warfare agents (CWAs) motivates the development of new materials to providee nhanced protection with ar educed burden. Metalorganic frame-works (MOFs) have recently been shown as highly effective catalysts for detoxifying CWAs,but challenges still remain for integrating MOFs into functional filter media and/or protective garments.Herein, we report aseries of MOFnanofiber kebab structures for fast degradation of CWAs.W e found TiO 2 coatings deposited via atomic layer deposition (ALD) onto polyamide-6 nanofibers enable the formation of conformal Zr-based MOF thin films including UiO-66, UiO-66-NH 2 ,a nd UiO-67. Cross-sectional TEM images show that these MOF crystals nucleate and growdirectly on and around the nanofibers,with strong attachment to the substrates.These MOF-functionalized nanofibers exhibit excellent reactivity for detoxifying CWAs.T he half-lives of aC WA simulant compound and nerve agent soman (GD) are as short as 7.3 min and 2.3 min, respectively.T hese results therefore provide the earliest report of MOF-nanofiber textile composites capable of ultra-fast degradation of CWAs.

Chemical targets to deactivate biological and chemical toxins using surfaces and fabrics

“…7a ). This approach has been used to grow PMOF on an Al 2 O 3 layer deposited on PP 94 and to grow UiO-67 on a TiO 2 layer deposited on polyamide-6 (PA-6) 101 (Fig. 7b ).…”

“…b | Scanning electron microscope (SEM) images of Al-based polypropylene–MOF 94 (left) and Ti-based MOF, polyamide (PA)-6@TiO 2 @UiO-67 (ref. 101 ) (right) obtained through ALD. c | Oxidation profiles of 2-chloroethyl ethyl sulfide (CEES) to 2-chloroethyl ethyl sulfoxide (CEESO) — conversion over time — using various photocatalysts 94 .…”

“…c | Oxidation profiles of 2-chloroethyl ethyl sulfide (CEES) to 2-chloroethyl ethyl sulfoxide (CEESO) — conversion over time — using various photocatalysts 94 . d | Conversion of dimethyl p -nitrophenylphosphate (DMNP) versus reaction time using MOF powder and MOF–fabric 101 . e | PSP.…”

“…Parts b (right) and d adapted with permission from ref. 101 , Wiley. Parts f and g adapted with permission from ref.…”

A Series of Cube-Shaped Polyoxoniobates Encapsulating Octahedral Cu12XmOn Clusters With Hydrolytic Decomposition for Chemical Warfare Agents

“…Chemical warfare agents (CWAs), as a class of chemical weapons (Dong et al, 2017), have been the subject of recent studies, which have explored materials that are effective in facilitating hydrolytic decomposition for CWAs. A series of Zr-based MOFs were originally applied to degrade these toxic CWAs, including dimethyl 4-nitrophenyl phosphate (DMNP) (Zhao et al, 2016) O n )(Nb 7 (OH)-O 21 ) 8 } polyanion possesses a three-shell cube-shaped structure that encapsulated the {Cu 12 X m O n } octahedron and {MCu 12 O 8 } body-centered cuboctahedron. Interestingly, this approach can effectively vary body-centered metal atoms.…”