Copper Hydroxyl Nitrate/Graphite Oxide Composite as Superoxidant for the Decomposition/Mineralization of Organophosphate‐Based Chemical Warfare Agent Surrogate

Arcibar‐Orozco, Javier A.; Giannakoudakis, Dimitrios A.; Bandosz, Teresa J.

doi:10.1002/admi.201500215

Cited by 31 publications

(41 citation statements)

References 37 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, a wide variety of materials have been reported with catalytic activity for degrading CWAs . Among them, metal–organic frameworks (MOFs) have been shown as highly effective adsorbents and catalysts for removing CWAs .…”

Section: Figurementioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

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.

show abstract

Section: Figurementioning

confidence: 99%

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

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The increased surface area, altered chemistry and specific morphology can play a crucial role in the adsorption and photocatalytic reactions of CEES, which we have chosen as a surrogate of the mustard gas. The performance of GCN and GCNox as CEES‐reactive adsorbents was evaluated in a closed system under ambient conditions . The samples were exposed to CEES for different periods of time (Figure A).…”

Section: Figurementioning

confidence: 99%

Mesoporous Graphitic Carbon Nitride‐Based Nanospheres as Visible‐Light Active Chemical Warfare Agents Decontaminant

et al. 2016

Self Cite

View full text Add to dashboard Cite

Graphitic carbon nitride, GCN, was oxidized using the Hummers' method. Both initial andm odified materials were extensively characterizedb yv ariousp hysical and chemical methods. The results showed the marked changes in morphology.E ven though the shortrange layered structure was still present in the oxidized sample, spherical nanoparticles with 5-50 nm sizes made up the bulk of the material. This resultsi nt he development of porosity in the mesopore range. Incorporation of oxygen groups at the edges of carbon nitrogen layers/ units is likely responsible for the formation of nanospheres (folding due to the polar forces). This process also increased the band gap energy from 2.85 to 3.39 eV.The initial ando xidized samples were used as reactivea dsorbents of am ustard gas surrogate. The results showeda n improvement in the adsorptive performance upon oxidation. Both samples were found photoactive in visible light. The degradation to ethyl vinyl sulfide was enhanced on the oxidized sample owing to the developed porosity and chemical heterogeneity.In recent years, an ew metal-freep olymeric semiconductor with al ayered structure, graphitic carbon nitride (GCN), entered the exclusive club of 'graphitic' compounds and attracted tremendous worldwide attention because of its visible-light range band gap energy,e xcellent thermal/chemical stability and tunable electronic structure. The main difference between GCN and graphite is the switch of every other carbon atom by nitrogen in the honeycomb motif where both Ca nd Nh ave sp 2 hybridization. Even thought he insertion of electrons to the anti-bonding molecular orbitals leads to the enhancedf ormation of holes, [1] the main drawback of the rapid recombination of electron-hole pairs limits the photocatalytic activity of GCN.[2] Since the first report from Wang et al. of GCN as a' metal-free' photocatalystf or visible-light-driven H 2 production from water in 2009, [3] many studies focusedo nt he improvement of the photocatalytic performance (especially for water splitting) via the incorporation of metals, quantum dots, polymers and graphene. [3][4][5][6][7][8][9][10][11] Av ariety of chemical andp hysical modifications has been appliedt oi ncrease the conductivity, delay charge recombination, increase proton concentration and open up the band gap.[12] They include an incorporation of heteroatoms, nanosheet preparation or buildingc omposites with visible-light-active or semiconducting phases. [13][14][15] It has been recently reported that some oxidationm ethods preserve the graphite-like structure in the nanoscale range.[15-17] For both initial and modifiedG CN nanosheets variousa pplications have been reported. [14,15,18] The objective of this study is to derive an ew form of GCN on which the visible-light driven oxidation would be improved. To do it,t he well-known and often appliedt og raphite Hummers' oxidation methodw as used.[20] As ar esult, an anospherical catalyst( GCNox)w ith an enhanced photocatalytic activity for the decomposition of 2-chloroethyl e...

show abstract

“…Metal organic frameworks (MOFs) are a diverse class of materials with extremely high porosity and tunable functionality. They have been explored for applications such as catalysis, gas adsorption and storage, energy storage, sensors, and separations . However, there is an intense need to translate MOFs into thin films and coatings so as to impart MOF‐like functionality into an underlying object that might otherwise not bear those qualities.…”

Section: Introductionmentioning

confidence: 99%

Water‐Based Assembly of Polymer–Metal Organic Framework (MOF) Functional Coatings

Nandasiri

Schaef

et al. 2016

Adv Materials Inter

View full text Add to dashboard Cite

Metal organic frameworks (MOFs) have gained attention for their porosity, size selectivity, and structural diversity. There is a need for MOF-based coatings, particularly in applications such as separations, electronics, and energy; yet forming thin, functional, conformal coatings is prohibitive because MOFs exist as a powder. Layer-by-layer assembly, a versatile thin film coating approach, offers a unique solution to this problem, but this approach requires MOFs that are water-dispersible and bear a surface charge. Here, these issues are addressed by examining water-based dispersions of MIL-101(Cr) that facilitate the formation of robust polymer-MOF hybrid coatings. Specifically, the substrate to be coated is alternately exposed to an aqueous solution of poly(styrene sulfonate) and nano MIL-101(Cr) dispersion, yielding linear film growth and coatings with a MOF content as high as 77 wt%. This approach is surface-agnostic, in which the coating is successfully applied to silicon, glass, flexible plastic, and even cotton fabric, conformally coating individual fibers. By contrast, prior attempts at forming MOF-coatings are severely limited to a handful of surfaces, require harsh chemical treatment, and are not conformal. The approach presented here unambiguously confirms that MOFs can be conformally coated onto complex and unusual surfaces, opening the door for a wide variety of applications.

show abstract

Copper Hydroxyl Nitrate/Graphite Oxide Composite as Superoxidant for the Decomposition/Mineralization of Organophosphate‐Based Chemical Warfare Agent Surrogate

Cited by 31 publications

References 37 publications

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

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

Mesoporous Graphitic Carbon Nitride‐Based Nanospheres as Visible‐Light Active Chemical Warfare Agents Decontaminant

Water‐Based Assembly of Polymer–Metal Organic Framework (MOF) Functional Coatings

Contact Info

Product

Resources

About