Availability of Zr-Based MOFs for the degradation of nerve agents in all humidity conditions

Ryu, Sam Gon; Kim, Min‐Kun; Park, Myung-Kyu; Jang, Seong On; Kim, Sung Hun; Jung, Hakyung

doi:10.1016/j.micromeso.2018.07.027

Cited by 36 publications

(44 citation statements)

References 25 publications

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“…To more clearly confirm the effect of water on the performance of Zr(OH) 4 /GO nanocomposite reactive particles in the degradation reaction of soman (GD), the degradation experiments were performed in aqueous solution. The results, presented in Figure S4, show that the degradation rate of soman (GD) by Zr(OH) 4 /GO nanocomposite in the aqueous solution seems to follow the catalytic reaction, similar to those obtained in previous study [14]. It is noted that the pH of the water containing Zr(OH) 4 /GO nanocomposite is 8.57, which is the same as of pristine Zr(OH) 4 solution.…”

Section: Hydrolytic Degradation Of Soman (Gd) By Zr(oh)4/go Nanocomposupporting

confidence: 85%

“…As shown in Figure 6, Zr(OH) 4 /GO nanocomposite exhibits type IV water isotherm, whereas Zr(OH) 4 shows type I water isotherm, as defined by International Union of Pure and Applied Chemistry (IUPAC) classification [16,44]. The type I water adsorption isotherm is characteristic of a hydrophilic material [14,45]. On the other hand, the type IV isotherm showing a sigmoidal course of an adsorption isotherm is usually observed the adsorption of water on hydrophobic porous materials such as aluminum phosphate, zeolite, metal-organic frameworks, and activated carbon [46].…”

Section: Discussion Of Water Adsorption Isotherms and Drift Spectra Omentioning

confidence: 98%

“…Zr(OH) 4 /GO nanocomposite and Zr(OH) 4 (10 mg, each) in a 2 mL vial were investigated with exposure to 80% relative humidity (80% RH) condition at 25 ℃ for various hours (72, 168, and 324 h). Subsequently, 0.4 μL of soman (GD) was added with 20 μL of pentane in each vial containing materials [ 14 ]. The vials were agitated vigorously on a vortex mixer for 10 min.…”

Section: Methodsmentioning

confidence: 99%

“…Novel materials making nerve agents decompose into less or nontoxic molecules have been going through noticeable evolutions in recent years [ 6 , 7 , 8 , 9 ]. Metal-organic frameworks (MOFs) [ 10 ], metal oxides (hydroxides) [ 11 , 12 ], and composite materials [ 12 ] have attracted significant attention as potential materials [ 13 , 14 , 15 , 16 ]. Zirconium hydroxide (Zr(OH) 4 ), which has various surface hydroxyl species and defect sites, is considered as one of the most prominent materials because of its superior sorptive property and wide range of reactivity toward nerve agents [ 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Zr(OH)4/GO Nanocomposite for the Degradation of Nerve Agent Soman (GD) in High-Humidity Environments

Jang¹,

Ka²,

Jung³

et al. 2020

Materials

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Zirconium hydroxide, Zr(OH)4 is known to be highly effective for the degradation of chemical nerve agents. Due to the strong interaction force between Zr(OH)4 and the adsorbed water, however, Zr(OH)4 rapidly loses its activity for nerve agents under high-humidity environments, limiting real-world applications. Here, we report a nanocomposite material of Zr(OH)4 and graphene oxide (GO) which showed enhanced stability in humid environments. Zr(OH)4/GO nanocomposite was prepared via a dropwise method, resulting in a well-dispersed and embedded GO in Zr(OH)4 nanocomposite. The nitrogen (N2) isotherm analysis showed that the pore structure of Zr(OH)4/GO nanocomposite is heterogeneous, and its meso-porosity increased from 0.050 to 0.251 cm3/g, compared with pristine Zr(OH)4 prepared. Notably, the composite material showed a better performance for nerve agent soman (GD) degradation hydrolysis under high-humidity air conditions (80% relative humidity) and even in aqueous solution. The soman (GD) degradation by the nanocomposite follows the catalytic reaction with a first-order half-life of 60 min. Water adsorption isotherm analysis and diffuse reflectance infrared Fourier transform (DRIFT) spectra provide direct evidence that the interaction between Zr(OH)4 and the adsorbed water is reduced in Zr(OH)4/GO nanocomposite, indicating that the active sites of Zr(OH)4 for the soman (GD) degradation, such as surface hydroxyl groups are almost available even in high-humidity environments.

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Section: Hydrolytic Degradation Of Soman (Gd) By Zr(oh)4/go Nanocomposupporting

confidence: 85%

Section: Discussion Of Water Adsorption Isotherms and Drift Spectra Omentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zr(OH)4/GO Nanocomposite for the Degradation of Nerve Agent Soman (GD) in High-Humidity Environments

Jang¹,

Ka²,

Jung³

et al. 2020

Materials

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“…This shows that catalyst modification is important and unique to every application. Similarly, Zr-based MOF-808, UiO-66 and UiO-66-NH 2 have been shown to be excellent candidates for the decomposition of nerve agents, even under high relative humidity 83 . Building on their previous findings 84 , de Koning and co-workers have also recently designed a detection kit for VX-contaminated surfaces, which uses a combination of the Zr-based NU-1000 MOF and 5,5′-dithiobis-(2-nitrobenzoic acid) (DTNB) 85 .…”

Section: Chemical Toxins and Their Remediationmentioning

confidence: 99%

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

et al. 2021

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Simple and highly active strontium-based catalyst for detoxification of an organophosphorus chemical warfare agent simulant

Hemmer

Wanderlind

Bazani

et al. 2020

Braz. J. Chem. Eng.

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A mixture of strontium carbonate, hydroxide and oxide was prepared by thermal decomposition of SrCO 3 and employed as catalyst in the decomposition of the chemical warfare agent simulant methyl paraoxon, by means of its transesterification with 1-propanol. The catalyst, which was characterized by N 2 physisorption (BET method), temperature programmed desorption (CO 2-TPD), Fourier Transform Infrared spectroscopy (FTIR), X-Ray diffraction (XRD) and Raman spectroscopy, promoted rate enhancements of the order of 10 7-fold in comparison to the spontaneous propanolysis reaction, the greatest catalytic effect promoted by metal oxide-based catalysts ever reported for this reaction. Compared to the fresh catalyst, the catalyst directly stored in the reaction solvent showed similar catalytic performance. Analysis of the reaction products by liquid chromatography with electrospray ionization mass spectrometry detection confirmed the transesterification of the substrate leading to dimethyl n-propyl phosphate, a product structurally related to a family of trialkyl phosphate flame retardants.

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Availability of Zr-Based MOFs for the degradation of nerve agents in all humidity conditions

Cited by 36 publications

References 25 publications

Zr(OH)4/GO Nanocomposite for the Degradation of Nerve Agent Soman (GD) in High-Humidity Environments

Zr(OH)4/GO Nanocomposite for the Degradation of Nerve Agent Soman (GD) in High-Humidity Environments

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

Simple and highly active strontium-based catalyst for detoxification of an organophosphorus chemical warfare agent simulant

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