MOFs meet macropores: Dynamic direct crystallization of the microporous aluminum isophthalate CAU-10 on reticulated open-cellular alumina foams

Betke, Ulf; Klaus, Michael; Eggebrecht, Jakob G.; Scheffler, Michael; Friedrich, Alexandra

doi:10.1016/j.micromeso.2018.01.020

Cited by 20 publications

(19 citation statements)

References 32 publications

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“…e strut thickness and strut filament thickness amount to 0.38 ± 0.15 mm and 0.13 ± 0.08 mm on average. As expected, the morphological parameters of the ZnO ceramic foams are within the same range as previously reported for alumina cellular ceramics made from the same 20 ppi PU foam templates [21].…”

Section: Macrostructure Of Zno Ceramic Foamssupporting

confidence: 87%

“…e import of the collected CT data into the CTAn software, and the differential thresholding-based binarization procedure preceding the actual calculations were performed as described elsewhere [20]. e cell size and strut thickness distributions were calculated after filling the hollow strut cavities by performing a morphological closing operation in CTAn using a round kernel with r � 10 μm as described in a previous study [21]. e strut filament thickness distribution was calculated without closing of the hollow strut cavities.…”

Section: Zno Foam Characterizationmentioning

confidence: 99%

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Reticulated Open-Celled Zinc Oxide Ceramic Foams: Manufacturing, Microstructure, Mechanical, and Thermal Properties

Betke

Scheffler

2019

Advances in Materials Science and Engineering

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Open-celled zinc oxide ceramic foams were prepared by the polymer sponge replication (Schwartzwalder) technique from aqueous ZnO dispersions with Sb2O3 and Bi2O3 as sintering additives, and mechanically stable ZnO foams with an average porosity of 93.6% were obtained. Their microstructure consists of ZnO grains with a Bi-containing grain boundary phase together with a Zn-Sb-O secondary phase with spinel structure. The obtained ZnO ceramic foams were characterized with respect to their morphology by computed tomography; in addition, the compressive strength and the thermal conductivity were determined, and the data were applied for modelling of the mechanical and thermal properties of the bulk ZnO strut material.

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Section: Macrostructure Of Zno Ceramic Foamssupporting

confidence: 87%

Section: Zno Foam Characterizationmentioning

confidence: 99%

Reticulated Open-Celled Zinc Oxide Ceramic Foams: Manufacturing, Microstructure, Mechanical, and Thermal Properties

Betke

Scheffler

2019

Advances in Materials Science and Engineering

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“…Hard templates may be carbons [62], ceramics [59,61,[63][64][65], and metals [60,[66][67][68]). They are typically in the form of monoliths, porous membranes, or foams [60,62,69].…”

Section: Hard Structural Templatingmentioning

confidence: 99%

Hierarchical Metal–Organic Frameworks with Macroporosity: Synthesis, Achievements, and Challenges

et al. 2019

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HIGHLIGHTS• The advantages of macroporous metal-organic frameworks (MOFs) in comparison with micro-and mesoporous MOFs are discussed.• A range of synthetic methods for the fabrication and characterisation of hierarchical MOFs with macroporosity are reviewed.• The applications, advancements, and challenges of each method are compared and assessed in detail.ABSTRACT Introduction of multiple pore size regimes into metalorganic frameworks (MOFs) to form hierarchical porous structures can lead to improved performance of the material in various applications.In many cases, where interactions with bulky molecules are involved, enlarging the pore size of typically microporous MOF adsorbents or MOF catalysts is crucial for enhancing both mass transfer and molecular accessibility. In this review, we examine the range of synthetic strategies which have been reported thus far to prepare hierarchical MOFs or MOF composites with added macroporosity. These fabrication techniques can be either pre-or post-synthetic and include using hard or soft structural template agents, defect formation, routes involving supercritical CO 2 , and 3D printing. We also discuss potential applications and some of the challenges involved with current techniques, which must be addressed if any of these approaches are to be taken forward for industrial applications.

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“…The CT data import into the CTAn software and the actual morphological calculations of the differential thresholding‐based binarization procedures are described in detail in a study by Betke et al The hollow struts were filled before the calculations of the cell size and strut thickness distributions. This step was performed with a morphological closing operation in CTAn with a round kernel, r = 13 μm …”

Section: Methodsmentioning

confidence: 99%

Open‐Cell Aluminum Foams by the Sponge Replication Technique: A Starting Powder Particle Study

2020

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Open-cell aluminum foams are manufactured by a sponge replication technique, and the effect of aluminum particles with different shapes and particle sizes on foam properties is studied. It is found that aluminum powder with spheroidal particles leads to aluminum foams with a lower strut porosity, a lower amount of alumina, and a higher compressive strength compared with foams manufactured from flaky, irregularly shaped aluminum powder. This effect is explained with the lower surface area of the first mentioned type of powder.

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MOFs meet macropores: Dynamic direct crystallization of the microporous aluminum isophthalate CAU-10 on reticulated open-cellular alumina foams

Cited by 20 publications

References 32 publications

Reticulated Open-Celled Zinc Oxide Ceramic Foams: Manufacturing, Microstructure, Mechanical, and Thermal Properties

Reticulated Open-Celled Zinc Oxide Ceramic Foams: Manufacturing, Microstructure, Mechanical, and Thermal Properties

Hierarchical Metal–Organic Frameworks with Macroporosity: Synthesis, Achievements, and Challenges

Open‐Cell Aluminum Foams by the Sponge Replication Technique: A Starting Powder Particle Study

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