US Government As Represented by the Secretary of the Army

The State University of New York

Leidos, Inc.

Jared B DeCoste

Gregory William Peterson

William E Bernier

Jian Qiang Liu

Wayne E Jones

Colin Robert Willis

Trenton M Tovar

Corinne Amy Stone

Ivan O Iordanov

Danielle McCarthy

Julia B Tollin

Emilly Obuya

Martin W Smith

Amee L Polk

Zachary B Zander

Danielle L Kuhn

Tyler J Demasky

Mixed-phase TiOnanofibers prepared via a sol-gel technique followed by electrospinning and calcination are provided as photocatalysts. The calcination temperature is adjusted to control the rutile phase fraction in TiOnanofibers relative to the anatase phase. Post-calcined TiOnanofibers composed of 38 wt % rutile and 62 wt % anatase exhibited the highest initial rate constant of UV photocatalysis. This can be attributed to the combined influences of the fibers' specific surface areas and their phase compositions.

Metal oxide nanofibrous materials for photodegradation of environmental toxins

A multispectral smoke obscurant composition effective in reducing transmittance in the visual, infrared, and ultraviolet regions of the electromagnetic spectrum, comprising at least one metal organic framework ('MOF'), at least one fuel, at least one oxidizer, and optionally one or more additives selected from the group consisting of binders, coolants, and accelerants. The MOF or MOF composite is present from about 10 to 90 weight percent of the smoke obscurant composition, while the fuel and the oxidizer in combination comprise about at least 10 weight percent of the smoke obscurant composition.

Pyrotechnic smoke obscurants containing metal-organic frameworks and composites thereof

A composite adsorbent material includes a component that creates a localized electric field and a porous material where adsorption occurs, wherein the localized electric field extends into the porous material. The localized electric field created by the component controls adsorption properties of the porous material. The porous material may be microporous. The component may include ferroelectric material including a &#x3b2;-phase of polyvinylidene fluoride (PVDF), and wherein the porous material may include any of zeolites, silicas, activated carbons, covalent organic frameworks (COFs), polymers of intrinsic microporosity (PIMs), and metal-organic frameworks (MOFs). The MOFs may include any of HKUST-1, UiO-66, and UiO-66-NH. The &#x3b2;-phase of PVDF and the HKUST-1 may be electrospun together. The &#x3b2;-phase of PVDF includes aligned polymer chains that create the localized electric field extending within the porous material. The localized electric field enhances adsorption of an adsorbate, particularly a non-polar adsorbate such as oxygen or carbon dioxide, to the porous material.

Enhancement of adsorption via polarization in a composite material

A composite adsorbent material includes a component that creates a localized electric field and a porous material where adsorption occurs, wherein the localized electric field extends into the porous material. The localized electric field created by the component controls adsorption properties of the porous material. The porous material may be microporous. The component may include ferroelectric material including a &#x3b2;-phase of polyvinylidene fluoride (PVDF), and wherein the porous material may include any of zeolites, silicas, activated carbons, covalent organic frameworks (COFs), polymers of intrinsic microporosity (PIMs), and metal-organic frameworks (MOFs). The MOFs may include any of HKUST-1, UiO-66, and UiO-66-NH. The &#x3b2;-phase of PVDF and the HKUST-1 may be electrospun together. The &#x3b2;-phase of PVDF includes aligned polymer chains that create the localized electric field extending within the porous material. The localized electric field enhances adsorption of an adsorbate, particularly a non-polar adsorbate such as oxygen or dioxide, to the porous material.

This invention is directed to a porous sorbent comprising a modified metal-organic framework (MOF) having a hierarchical pore structure. The MOF is modified by plasma-enhanced chemical vapor deposition with air, fluorocarbons, or other sources of fluorine. In preferred embodiments the MOFs are zirconium based. The modified MOF, while surprisingly retaining its crystal structure, comprises a mixture of micropores and mesopores and embedded fluorine atoms.

Metal-organic framework sorbents having hierarchical pore structure and method of making the same

A system and method of filtering comprising adsorbing a toxic chemical using a metal-organic framework (MOF) compound that has been post-treated with fluorocarbons using plasma-enhanced chemical vapor deposition (PECVD). The toxic chemical may comprise any of ammonia and cyanogen chloride. Furthermore, the toxic chemical may comprise any of an acidic/acid-forming gas, basic/base-forming gas, oxidizer, reducer, and organic gas/vapor. The toxic chemical is physically adsorbed by the MOF compound. Moreover, the toxic chemical interacts with unsaturated metal sites within the MOF. Additionally, the MOF compound may comprise any of Cu-BTC, MOF-177, and an isoreticular metal-organic frame work (IRMOF) compound. The MOF compound may comprise a metal-carboxylate bond. Additionally, the MOF compound may be unstable in the presence of moisture.

Removal of toxic chemicals using metal-organic frameworks (MOFs) post-treated via plasma-enhanced chemical vapor deposition (PECVD) with fluorocarbons

A system and method of filtering comprising adsorbing a toxic chemical using a metal-organic framework (MOF) compound that has been post-treated with fluorocarbons using plasma-enhanced chemical vapor deposition (PECVD). The toxic chemical may comprise any of ammonia and cyanogen chloride. Furthermore, the toxic chemical may comprise any of an acidic/acid-forming gas, basic/base-forming gas, oxidizer, reducer, and organic gas/vapor. The toxic chemical is physically adsorbed by the MOF compound. Moreover, the toxic chemical interacts with unsaturated metal sites within the MOF. Additionally, the MOF compound may comprise any of Cu-BTC, MOF-177, and an isoreticular metal-organic framework (IRMOF) compound. The MOF compound may comprise a metal-carboxylate bond. Additionally, the MOF compound may be unstable in the presence of moisture.

Growing community of inventors

Bel Air, MD, United States of America

Jared B DeCoste