Metal–organic framework gels and monoliths

Hou, Jingwei; Sapnik, Adam; Bennett, Thomas D.

doi:10.1039/c9sc04961d

Cited by 225 publications

(184 citation statements)

References 109 publications

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“…The value recorded prior to this decrease is reported as the crushing force or crushing strength of the material. Figure 2 shows a comparison of the results obtained for two extrudates of the same batch and, also, the crushing force required to break an extrudate of commercial 4A zeolite [9]. The obtained results clearly show that despite the variability between pellets of the same batch, the extruded ZSM-5 pellets have good mechanical properties comparable to (or even higher than) other commercially available zeolites.…”

Section: Compression Testsmentioning

confidence: 91%

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Extrusion and Characterization of High Si/Al Ratio ZSM-5 Using Silica Binder

et al. 2020

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Biogas upgrading is a key operation for transforming raw biogas into valuable biomethane that can be used as fuel or transported through pipelines. Pressure swing adsorption (PSA) is one possible technique that can be used for upgrading. ZSM-5 with high silica/aluminum (Si/Al) ratio has a reasonable CO2/CH4 selectivity and an almost linear CO2 adsorption isotherm, which can reduce power consumption. Extrusion of zeolites uses Al-based binders which can result in a denaturation and in a decrease of Si/Al ratio, promoting a steeper CO2 isotherm and also impacting the water adsorption. In this work, we have extruded a ZSM-5 (with a Si/Al = 200) using only silica-based binder. Different samples were obtained using different extrusion paste compositions and operating conditions and their textural properties characterized. The mechanical strength of the samples as well as the CO2, CH4, and H2O adsorption equilibrium isotherms at 303–343 K were measured. Our results show that it is possible to produce extrudates with mechanical resistance comparable to (or higher than) commercial zeolite materials with surface area reductions lower than 10% and little or no impact on the CO2/CH4 selectivity.

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Section: Compression Testsmentioning

confidence: 91%

“…Novel applications in moving-bed type of reactors require sub-mm particle diameters [8]. The typical shapes of industrial porous materials are pellets, extrudates, laminates, and monoliths [9].…”

Section: Introductionmentioning

confidence: 99%

Extrusion and Characterization of High Si/Al Ratio ZSM-5 Using Silica Binder

et al. 2020

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“…According to the needs in various applications, thousands of MOFs have been synthesized by now since being reported in the 1990s [1,[24][25][26]. Nowadays, MOFs are available in various structures, such as nanocrystals (NCs) [27], nanospheres [28], nanosheets [29], needles [30], hierarchical monoliths [31], thin films (TFs) [32], membranes [33], and glasses [34][35][36]. Among these structures, MOF-TFs are drawing increasing attention due to their tremendous potential in the development of nanotechnology-enabling applications, such as optics [37], photonics [38], electronics [39], catalytic coatings [40], sensing [41][42][43][44], solar cell [45], battery [46], and supercapacitor [44].…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework Thin Films: Fabrication, Modification, and Patterning

Zhang

Chang

2020

Processes

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Metal–organic frameworks (MOFs) have been of great interest for their outstanding properties, such as large surface area, low density, tunable pore size and functionality, excellent structural flexibility, and good chemical stability. A significant advancement in the preparation of MOF thin films according to the needs of a variety of applications has been achieved in the past decades. Yet there is still high demand in advancing the understanding of the processes to realize more scalable, controllable, and greener synthesis. This review provides a summary of the current progress on the manufacturing of MOF thin films, including the various thin-film deposition processes, the approaches to modify the MOF structure and pore functionality, and the means to prepare patterned MOF thin films. The suitability of different synthesis techniques under various processing environments is analyzed. Finally, we discuss opportunities for future development in the manufacturing of MOF thin films.

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“…Metal-organic frameworks (MOFs) represent a class of materials with the combination of extraordinary porous, structural, and chemical properties, 1,2 which would become a new emerging nansocale building block for constructing macroscopic assemblies for a broad range of applications. [3][4][5][6] Some techniques, such as self-gelation, 3 have recently been developed to fabricate highly porous MOF aerogels. However, similar to most of the existing porous materials, the resulting MOF aerogels are brittle and have small recoverable deformation before failure.…”

Section: Introductionmentioning

confidence: 99%

“…Previous analysis suggests that it would be signi cantly challenging to realize superelasticity in three-dimensional (3D) MOF assembles. [3][4][5][6] The capability of sustaining structural integrity during considerable deformations for 3D MOF assemblies is not only crucial for fabricating new categories of exible energy devices, such as electrocatalysis, 1 batteries, 9,10 and supercapacitors, 2,11 but also critical for future design of macroscopic MOF-based biological tissues resistant for mechanical damping. 12 It is therefore highly desirable to explore new strategies to address this challenging yet very important problem.…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired general synthesis of superplastic metal-organic framework aerogels and their applications

Sun

Zhu

et al. 2020

Preprint

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Many proposed utilizations for metal-organic frameworks (MOFs) demand their assembly into three-dimensional (3D) monolithic architectures. The capability of sustaining structural integrity during considerable deformations is important to allow a monolithic material that works reliably. Nevertheless, it remains a significant challenge to realize high superplasticity in 3D macroscopic MOF networks. Here we report the ice-template-driven assembly of MOF nanobelts to form superelastic MOF-based cellular aerogels. Inspired by the hierarchical architecture of natural cork, the resulting materials can fully and rapidly recover its initial architecture after 50% strain compression and unloading for 2000 cycles. The characteristic hierarchical structure can be extended to single (Ni-, Mn-, and Co-), binary (NiMn-, NiCo-, and CoMn-), and ternary (NiCoMn-) MOF aerogels with exceptionally structural and chemical properties. Potential application has been further demonstrated for NiMn-MOF aerogels in flexible energy conversion, which can effectively electrocatalysize hydrogen evolution in natural seawater even in the presence of considerable electrode deformations. The successful fabrication of such a class of fascinating architectures opens up enormous opportunities for exploring new application of MOFs in a free-standing, structurally adaptive, and macroscopic form

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Metal–organic framework gels and monoliths

Abstract: This perspective links the synthesis of MOF Gels to the formation of MOF-monoliths and their resultant properties and application.

Cited by 225 publications

References 109 publications

Extrusion and Characterization of High Si/Al Ratio ZSM-5 Using Silica Binder

Extrusion and Characterization of High Si/Al Ratio ZSM-5 Using Silica Binder

Metal–Organic Framework Thin Films: Fabrication, Modification, and Patterning

Bio-inspired general synthesis of superplastic metal-organic framework aerogels and their applications

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