Oriented UiO-66 thin films through solution shearing

Ghorbanpour, Arian; Huelsenbeck, Luke; Smilgies, Detlef‐M.; Giri, Gaurav

doi:10.1039/c7ce01801k

Cited by 24 publications

(25 citation statements)

References 55 publications

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“…It should be noted this result differs from our previous study in that solution shearing enhanced particle orientation compared to drop cast samples. This difference is likely due to the large particle size and high aspect ratios of [Zn 2 (NDC) 2 (DABCO)] n (3-10 µm and 7-10, respectively) compared to UiO-66 in our previous study (<1 µm and 1, respectively) [20]. In this case the larger size is not as greatly affected by the flow coating region during shearing or shear alignment forces exerted on large, high aspect ratio particles are comparable for the solution shearing and drop casting processes.…”

Section: Morphology Isotropic Powdermentioning

confidence: 70%

“…A solution shearing procedure previously outlined by Ghorbanpour et al was used to make thin films from particle suspension [20]. Solution shearing was conducted on 1 cm × 1 cm silicon wafers washed thoroughly with toluene, acetone, and isopropyl alcohol prior to the deposition of 20 µL of 5 wt./wt.…”

Section: Solution Shearing Of [Zn 2 (Ndc) 2 (Dabco)] N Particlesmentioning

confidence: 99%

“…Previous studies by our group have shown that well faceted MOF morphologies can be utilized in combination with flow coating techniques to control the crystal orientation of MOF thin films [20]. Orienting MOFs, to obtain selected pore apertures on substrates is desirable for high performance separations membranes [38,39].…”

Section: Orientation Of [Zn 2 (Ndc) 2 (Dabco)] N Particle Filmsmentioning

confidence: 99%

See 2 more Smart Citations

Modulating and Orienting an Anisotropic Zn-Based Metal Organic Framework for Selective CH4/CO2 Gas Separation

Huelsenbeck

Westendorff

et al. 2018

Crystals

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This work investigates the morphological control of the anisotropic [Zn 2 (NDC) 2 (DABCO)] n MOF (Metal organic framework) and the subsequent adsorption characteristics for CO 2 /CH 4 gas separation. Morphology of the MOF crystals is controlled by the use of modulators. The addition of acetic acid or pyridine successfully produce rod or plate morphologies, respectively, with each morphology possessing a different major surface pore aperture. Single-component equilibrium and kinetic adsorption data for CO 2 and CH 4 were collected. Equilibrium analysis indicates a slight selectivity towards CO 2 whereas kinetic data unexpectedly shows lower diffusion time constants for CO 2 compared to CH 4 . Mass transfer resistances on each species is discussed. Finally, a coating technique termed solution shearing is used to orient different morphologies on substrates as a film. An increase in film orientation is observed for the rod morphology, indicating that this MOF morphology is a promising candidate to create large area, thin-film applications.

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Section: Morphology Isotropic Powdermentioning

confidence: 70%

Section: Solution Shearing Of [Zn 2 (Ndc) 2 (Dabco)] N Particlesmentioning

confidence: 99%

Section: Orientation Of [Zn 2 (Ndc) 2 (Dabco)] N Particle Filmsmentioning

confidence: 99%

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Modulating and Orienting an Anisotropic Zn-Based Metal Organic Framework for Selective CH4/CO2 Gas Separation

Huelsenbeck

Westendorff

et al. 2018

Crystals

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“…Continuous growth of UiO-66 results in either a polycrystalline or an epitaxial film. As free-standing films were not mechanically robust, porous and nonporous substrates were employed to support UiO-66 membranes [28,59,[86][87][88][89][90][91][92][93][94][95][96] and films [96,[99][100][101][102][103][104][105][106][107][108][109][110][111][112], respectively. Porous metal and ceramic substrates with minimal permeation resistance in the configuration of flat sheets and tubes were adopted for supporting UiO-66 membranes.…”

Section: Approaches For Fabricating Uio-66 Membranesmentioning

confidence: 99%

Metal-organic framework UiO-66 membranes

Liu

2019

Front. Chem. Sci. Eng.

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Metal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including in situ synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

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“…Metal–organic frameworks (MOFs) are highly porous, crystalline materials composed of metal ions clusters as nodes and organic molecules as linkers. − Compared with other porous materials, i.e., zeolites and activated carbon, MOFs possess both ordered porosity and easily tunable chemical functionality by either changing the metal ion or by changing the linker chemistry. ,− Because of their tunable pores and structural flexibilities, MOFs are being studied for a wide range of applications, including catalysis, filtration, − drug delivery, hydrogen and carbon dioxide storage, and sensing. ,, For many of these applications, such as sensing, separations, and ion/charge transport, it is beneficial to create the MOFs as thin films. Thin films can result in lowered mass-transfer resistances while the presence of MOF pores can still result in selective performance, e.g., for separations.…”

Section: Introductionmentioning

confidence: 99%

Meniscus Guided Coating and Evaporative Crystallization of UiO-66 Metal Organic Framework Thin Films

Jung

Verma

Robinson

et al. 2021

Ind. Eng. Chem. Res.

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Thin-film fabrication of metal organic frameworks (MOFs) has been explored for a range of applications, including separations, catalysis, sensing, and charge transport. However, many fabrication techniques have obstacles, including slow crystallization, control over film thickness, and control over crystallinity. Recently, a meniscus-guided coating technique, called solution shearing, has been shown to create MOF thin films within minutes and with control over the film thickness. However, there have been no previous reports of solution shearing based evaporative crystallization of zirconium-based MOFs, which have been widely studied for the aforementioned applications. Here, for the first time, we show that (i) the zirconium 1,4-dicarboxybenzene MOF, UiO-66, can be formed using evaporative crystallization during solution shearing, and (ii) a wide range of parameters can be tuned to control the film thickness, coverage, and crystallinity. Finally, we bring the solution shearing technique closer to separation applications by growing a full film of UiO-66 crystals up to the resolution of scanning electron microscopy (SEM) on anodic alumina oxide (AAO). This is the first instance of UiO-66 crystals being formed using an evaporative crystallization-based flow coating method, and solution shearing shows the promise to be applicable to form large area zirconium-based MOF crystals in a rapid manner (within seconds to minutes).

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Oriented UiO-66 thin films through solution shearing

Abstract: Here, we discuss the fabrication of oriented films of UiO-66 crystals via the solution shearing based deposition of the crystal suspension over functionalized silicon substrates.

Cited by 24 publications

References 55 publications

Modulating and Orienting an Anisotropic Zn-Based Metal Organic Framework for Selective CH4/CO2 Gas Separation

Modulating and Orienting an Anisotropic Zn-Based Metal Organic Framework for Selective CH4/CO2 Gas Separation

Metal-organic framework UiO-66 membranes

Meniscus Guided Coating and Evaporative Crystallization of UiO-66 Metal Organic Framework Thin Films

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