Conformal and highly adsorptive metal–organic framework thin films via layer-by-layer growth on ALD-coated fiber mats

Zhao, Junjie; Gong, Bin; Nunn, William T.; Lemaire, Paul C.; Stevens, Eric C.; Sidi, Fahim I.; Williams, Philip S.; Oldham, Christopher J.; Walls, Howard; Shepherd, Sarah D.; Browe, Matthew A.; Peterson, Gregory W.; Losego, Mark D.; Parsons, Gregory N.

doi:10.1039/c4ta05501b

Cited by 107 publications

(82 citation statements)

References 38 publications

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“…It is also important to minimize the volume and weight of the active materials to reduce the burden for end users while maintaining substantial long‐term protection. In contrast, MOF thin films immobilized on functional substrates can simplify the handling and deployment, and are likely to promote MOF applications in CWA detoxification.…”

Section: Figurementioning

confidence: 99%

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

et al. 2016

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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.

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Section: Figurementioning

confidence: 99%

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

et al. 2016

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“…[10][11][12][13][14][15][16] Among the reported MOF catalysts, MOFs containing Zr-based clusters,i ncluding UiO-type MOFs,N U-1000, MOF-808, and PCN-222/MOF-545, have exhibited exceptional catalytic activity for degrading CWAs and simulants with half-lives as short as 0.5 min. In contrast, MOF thin films immobilized on functional substrates can simplify the handling and deployment, [17,18] and are likely to promote MOF applications in CWAd etoxification. Forexample,the powder form of MOFs is not the ideal configuration for gas filters,p rotective suits and clothing.…”

mentioning

confidence: 99%

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

et al. 2016

Self Cite

View full text Add to dashboard Cite

The threat associated with chemical warfare agents (CWAs) motivates the development of new materials to provide enhanced protection with a reduced burden. Metal-organic 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 a series of MOF-nanofiber kebab structures for fast degradation of CWAs. We found TiO 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 , and UiO-67. Cross-sectional TEM images show that these MOF crystals nucleate and grow directly on and around the nanofibers, with strong attachment to the substrates. These MOF-functionalized nanofibers exhibit excellent reactivity for detoxifying CWAs. The half-lives of a CWA simulant compound and nerve agent soman (GD) are as short as 7.3 min and 2.3 min, respectively. These results therefore provide the earliest report of MOF-nanofiber textile composites capable of ultra-fast degradation of CWAs.

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“…ALD method was also used to initiate polymer film surface for applying other coating methods. For example, Peng et al [ 84 ] and Zhao et al [ 85 ] recently reported its enabling role to molecular layer deposition (MLD) and layer‐by‐layer (LbL), respectively. MLD and ALD are both based on self‐limiting vapor phase surface reactions that offer unmatchable uniformity and controllability to the surface coating layer.…”

Section: Ald Enabled Film Coating Methodsmentioning

confidence: 99%

“…PP surface activation by ALD of polar and hydrophilic oxide nanolayers like Al 2 O 3 enhances the adsorption of charged layers onto the substrate during the initial period of LbL. Zhao et al [ 85 ] combined ALD and LbL to develop novel metal–organic framework (MOF) thin films as adsorptive gas filters for H 2 S and NH 3 removals. [ 89 ] Since there is no active functional group for MOF nucleation on the surface of PP fibers, full coverage of PP film by a homogeneous Al 2 O 3 nanolayer is critical to the attachment of MOF nucleation seeds onto the fibers during the initial process stage of LbL process.…”

Section: Ald Enabled Film Coating Methodsmentioning

confidence: 99%

Atomic Layer Deposition for Polypropylene Film Engineering—A Review

Song

2020

Macro Materials & Eng

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Polypropylene (PP) polymers are used extensively as dielectric layers, packaging films, and separation membranes, etc. Structure, chemistry, and surface features of PP films dominate their performance and durability. Modification of PP films is carried out using atomic layer deposition (ALD) among other techniques to coat uniform layer of nanometer inorganic material on the surface and inside the pores of PP films to serve the purpose of target applications better. Controlling the reaction temperature, precursor pulsing time, and number of cycles during deposition predominate the thickness, morphology, and composition of the coated layer and hence the performance of PP films. Overall, the ALD technique has been proven to be advantageous in advancing PP film properties such as hydrophilicity, UV resistance, membrane separators, dielectric and mechanical strength, etc., primarily through the controllable formation of nanometer coating on PP films. This review discusses the recent advancements and prospective of ALD in the modification and functionalization of PP films for various applications to provide some insights and motivations to design high‐performance novel PP films by well leveraging the ALD technique.

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Conformal and highly adsorptive metal–organic framework thin films via layer-by-layer growth on ALD-coated fiber mats

Abstract: Fiber@ALD@MOF structures fabricated via ALD and layer-by-layer MOF synthesis show good conformality and high adsorption capacity.

Cited by 107 publications

References 38 publications

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

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

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

Atomic Layer Deposition for Polypropylene Film Engineering—A Review

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