A New Synthetic Route to Microporous Silica with Well‐Defined Pores by Replication of a Metal–Organic Framework

Kondo, Atsushi; Hall, Anthony Shoji; Mallouk, Thomas E.; Maeda, Kazuyuki

doi:10.1002/chem.201501599

Cited by 10 publications

(6 citation statements)

References 75 publications

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“…Among the different strategies suggested in literature, the use of metal organic-frameworks (MOFs) as precursors for the synthesis of nanomaterials such as metal (oxide) nanoparticles 23 – 26 , porous silica 27 , 28 , or nanoporous carbons 29 offers unrivaled design possibilities, as we also demonstrate in this work. Herein we report a multi-step approach for the preparation of highly loaded Co on silica FTS catalysts that circumvents the interdependence between metal loading, active site dispersion, and accessibility.…”

Section: Introductionmentioning

confidence: 65%

Manufacture of highly loaded silica-supported cobalt Fischer–Tropsch catalysts from a metal organic framework

et al. 2017

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The development of synthetic protocols for the preparation of highly loaded metal nanoparticle-supported catalysts has received a great deal of attention over the last few decades. Independently controlling metal loading, nanoparticle size, distribution, and accessibility has proven challenging because of the clear interdependence between these crucial performance parameters. Here we present a stepwise methodology that, making use of a cobalt-containing metal organic framework as hard template (ZIF-67), allows addressing this long-standing challenge. Condensation of silica in the Co-metal organic framework pore space followed by pyrolysis and subsequent calcination of these composites renders highly loaded cobalt nanocomposites (~ 50 wt.% Co), with cobalt oxide reducibility in the order of 80% and a good particle dispersion, that exhibit high activity, C5 + selectivity and stability in Fischer–Tropsch synthesis.

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Section: Introductionmentioning

confidence: 65%

Manufacture of highly loaded silica-supported cobalt Fischer–Tropsch catalysts from a metal organic framework

et al. 2017

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“…(a) Experimental data (symbols) from five independent measurements of methanol adsorption in CuBTC at 298 ± 5 K. − Different symbols are used to distinguish between different experimental groups, while filled or hollow symbols show different publications from one group. The fitted continuous isotherms used in our analysis are shown as solid curves, and the two isotherms classified as type 2 outliers are labeled.…”

Section: Results and Discussionmentioning

confidence: 99%

Experimentally Verified Alcohol Adsorption Isotherms in Nanoporous Materials from Literature Meta-Analysis

et al. 2020

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Systematic collection of replicate experimental data via literature meta-analysis is a powerful approach for assessing the reproducibility of physical properties data. In this paper, we use meta-analysis to examine the adsorption equilibrium of alcohols in porous materials using a collection of more than 500 alcohol isotherm measurements. We report consensus isotherms (after rejecting outliers) using experimentally measured replicates for 11 systems with methanol, ethanol, 1-propanol, or 2-methylpropan-1-ol adsorption as well as assess experimental reproducibility for another 50 systems with these adsorbates, 1-butanol or 2-phenylethan-1-ol. Our analysis indicates that ∼20% of reported adsorption isotherms for alcohols are outliers, an observation that is similar to earlier analyses of CO2 adsorption experiments. We compare a variety of replicate experiments using metal–organic framework adsorbents with predictions from molecular simulations using generic force fields in order to examine the ability of these simulations to predict alcohol adsorption in these materials.

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“…Interestingly, powder X-ray diffraction (XRD) data revealed that the titania phase adopted the brookite polymorph, which likely is attributable to a stabilizing influence of the MOF pores, as well as the presence of Cu 2+ ions during its formation . More recently, this synthetic technique was further adapted for the preparation of microporous silica via hydrothermal treatment of tetraethoxysilane after loading within the HKUST-1 framework …”

Section: Hybridization Of Mofs With Ceramicsmentioning

confidence: 99%

“…112 More recently, this synthetic technique was further adapted for the preparation of microporous silica via hydrothermal treatment of tetraethoxysilane after loading within the HKUST-1 framework. 113 3.2. Templating by External Surfaces of MOF Crystals.…”

Section: Hybridization Of Mofs With Ceramicsmentioning

confidence: 99%

Sol–Gel Processing of Metal–Organic Frameworks

et al. 2017

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Sol–gel processing represents a powerful and versatile strategy for the preparation of functional inorganic and hybrid materials that facilitate control over the molecular composition, as well as organization of the materials at the various length scales relevant to fundamental and applied research. Recent advances have enabled its use for the processing of an emerging class of functional porous materials called metal–organic frameworks (MOFs). Here, sol–gel approaches can be employed for the direct manipulation of MOFs, or as a route to the construction of composite materials where the properties of the MOF are synergistically combined with those of a carefully chosen inorganic phase. In this review, we present the most significant progress made in this emerging area, according to four main synthetic strategies, with a particular focus on describing how sol–gel processing enhances the functionalities of the MOF. These strategies include (1) molecular scale manipulations of the pore surfaces of MOFs with sol–gel precursors; (2) the controlled positioning or growth of MOF crystals on inorganic surfaces; (3) the use of MOF crystals as templates for sol–gel processes (either within the pores, or at the external surfaces); and (4) the use of sol–gel-derived sacrificial inorganic templates for the structuring of MOF-based architectures. Each of these processing methods imparts unique properties to the systems and provides a route to higher-order architectures and material compositions not accessible through conventional approaches to MOF synthesis. Sol–gel processing provides promising routes toward new functional materials that display enhanced properties and are expected to play an important role in allowing MOFs to be optimized for specific applications.

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A New Synthetic Route to Microporous Silica with Well‐Defined Pores by Replication of a Metal–Organic Framework

Cited by 10 publications

References 75 publications

Manufacture of highly loaded silica-supported cobalt Fischer–Tropsch catalysts from a metal organic framework

Manufacture of highly loaded silica-supported cobalt Fischer–Tropsch catalysts from a metal organic framework

Experimentally Verified Alcohol Adsorption Isotherms in Nanoporous Materials from Literature Meta-Analysis

Sol–Gel Processing of Metal–Organic Frameworks

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