Synthesis of high-performance polycrystalline metal–organic framework membranes at room temperature in a few minutes

Hao, Jian; Babu, Deepu J.; Liu, Qi; Chi, Heng‐Yu; Lü, Chunxiang; Liu, Yaodong; Agrawal, Kumar Varoon

doi:10.1039/c9ta12027k

Cited by 35 publications

(23 citation statements)

References 61 publications

(81 reference statements)

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“…Much weaker diffraction peaks were observed for the latter case, which confirms that Pt@Cu 3 (HHTP) 2 thin-film is grown on the substrate after being extruded out of the microfluidic channels. Previous C-MOF growth techniques indicate that elevated temperature is needed for thin-film growth since energy is required to form coordination bonds; this corroborates the XRD results 36 . As stated above, the simultaneous synthesis and growth of thin film is a unique feature of MiCS, which allows the formation of a densely packed high-quality film with low surface roughness and nanoscale thickness control (discussed below).…”

Section: Resultssupporting

confidence: 87%

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

et al. 2021

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Conductive metal-organic framework (C-MOF) thin-films have a wide variety of potential applications in the field of electronics, sensors, and energy devices. The immobilization of various functional species within the pores of C-MOFs can further improve the performance and extend the potential applications of C-MOFs thin films. However, developing facile and scalable synthesis of high quality ultra-thin C-MOFs while simultaneously immobilizing functional species within the MOF pores remains challenging. Here, we develop microfluidic channel-embedded solution-shearing (MiCS) for ultra-fast (≤5 mm/s) and large-area synthesis of high quality nanocatalyst-embedded C-MOF thin films with thickness controllability down to tens of nanometers. The MiCS method synthesizes nanoscopic catalyst-embedded C-MOF particles within the microfluidic channels, and simultaneously grows catalyst-embedded C-MOF thin-film uniformly over a large area using solution shearing. The thin film displays high nitrogen dioxide (NO2) sensing properties at room temperature in air amongst two-dimensional materials, owing to the high surface area and porosity of the ultra-thin C-MOFs, and the catalytic activity of the nanoscopic catalysts embedded in the C-MOFs. Therefore, our method, i.e. MiCS, can provide an efficient way to fabricate highly active and conductive porous materials for various applications.

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Section: Resultssupporting

confidence: 87%

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

et al. 2021

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“…Much weaker diffraction peaks were observed for the latter case, which confirm that Pt@Cu3(HHTP)2 thin-film is grown on the substrate after being extruded out of the microfluidic channels. Previous C-MOF growth techniques indicate that elevated temperature is needed for thin-film growth since energy is required to form coordination bonds; this corroborates the XRD results 34 . As stated above, the simultaneous synthesis and growth of thin-film is a unique feature of MiCS, which allows the formation of densely packed high-quality film with low surface roughness and nanoscale thickness control (discussed below).…”

supporting

confidence: 87%

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

Kim

Koo

Kim

et al. 2021

Preprint

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Conductive metal-organic framework (C-MOF) thin-films have a wide variety of potential applications in the field of electronics, sensors, and energy devices. The immobilization of various functional species within the pores of C-MOFs can further improve the performance and extend the potential applications of C-MOFs thin-films. However, there are currently no effective strategies for facile and scalable synthesis of high quality ultra-thin C-MOFs while simultaneously immobilizing functional species within the MOF pores. Here, we develop microfluidic channel-embedded solution-shearing (MiCS) for ultra-fast (≤ 5 mm/s) and large-area synthesis of high-quality nanocatalyst-embedded C-MOF thin-films with thickness controllability down to tens of nanometers. The MiCS method synthesizes nanoscopic catalyst-embedded C-MOF particles within the microfluidic channels, and simultaneously grows catalyst-embedded C-MOF thin-film uniformly over a large area using solution shearing. The thin-film displays highest nitrogen dioxide (NO2) sensing properties at room temperature in air amongst two-dimensional materials, owing to the high surface area and porosity of the ultra-thin C-MOFs, and the catalytic activity of the nanoscopic catalysts embedded in the C-MOFs. Therefore, our method, i.e. MiCS, can open new avenues of highly active and conductive porous materials for various applications.

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“…Previous studies show that precursor depletion can lead to severe MOF film cracking. [57] Our cyclic growth approach is favorable because it maintains great precursor concentration, thereby promoting uniform MOF coverage.…”

Section: Synthesis and Characterization Of Mof-fiber Compositesmentioning

confidence: 99%

Highly Breathable Chemically Protective MOF‐Fiber Catalysts

Lee

Dai

Peterson

et al. 2021

Adv Funct Materials

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Fibrous composite materials provide distinct advantages in large surface area and enhanced molecular transport through the media, lending themselves to diverse applications. Despite substantial development in synthetic methods, it is still lacking in insights into structure-property relationships that can correlate features of the functional materials to absorptive, transport, and catalytic performance of the composites. Herein, for the first time, a systematic structure-property-function analysis is provided for Zr-based metalorganic frameworks (MOFs) coated onto polypropylene nonwoven textiles. MOF fraction on the fabric and defect density in MOF microstructures are controlled by an in situ seeded growth, where fiber surfaces are pretreated with metal-oxide by atomic layer deposition. The best performing MOF-fiber composite shows a rapid catalytic hydrolysis rate for a chemical warfare agent simulant, p-nitrophenyl phosphate with t 1/2 < 5 min, and a significant permeation restriction of a real agent GD-vapor through the composite. Of added advantage is the observed moisture vapor transport rate of 15 000 g m −2 day −1 for the composite, which is notably superior to that of other commercially available chemical-protective fabrics. The chemical-protective composites realized in this work overcome the breathability/detoxification trade-off and show promise for the materials to be deployed in a realistic field.

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Synthesis of high-performance polycrystalline metal–organic framework membranes at room temperature in a few minutes

Abstract: Our method hinders the Ostwald ripening of polycrystalline MOF film during the solvothermal synthesis, allowing the growth of high-quality MOF films in just 8 min at room temperature.

Cited by 35 publications

References 61 publications

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

Highly Breathable Chemically Protective MOF‐Fiber Catalysts

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