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Showing 1 to 20 of 20 for “"ZIF-8"”.
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Explorando a tansdução fototérmica de MOFs contendo íons CU²+ e do híbrido HKUST-1/FA
… sintetizados e caracterizados nanocristais de ZIF-8 dopados com íon Cu²⁺, nomeados como Cu10%/ZIF-8 e Cu25%/ZIF-8, cujas porcentagens molares foram de 10 e 25% de Cu(NO₃)₂ em relação ao Zn(NO₃)₂, respectivamente. Os resultados mostraram que a dopagem da estrutura da ZIF-8 leva a diminuição do …
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Synthesis and engineering of metal-organic frameworks for liquid phase applications
… functionalities. The poor stability of powdered ZIF-8 in acidic media and even in neutral conditions is attested. More importantly, the kinetic stability of ZIF-8 is dramatically improved by shaping into a pure phase monolithic MOF using a sol-gel synthesis process. Whereas the stability of …
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Mechanochemistry of metal-organic frameworks under compression
… TNT. The response of another prototypical MOF, ZIF-8, under compression from dynamic shockwave generated by a table-top laser-driven flyer plate system, has been studied. The shockwave profile after propagation in ZIF-8 layer is significantly stretched in time compared to the direct impact at …
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AN EXPERIMENTAL STUDY OF THE EFFECTS OF SUBSTRATE POROSITY, MORPHOLOGY, AND FLEXIBILITY ON THE EQUILIBRIUM THERMODYNAMICS AND KINETICS OF ADSORPTION FOR ATOMIC AND MOLECULAR ADSORBATES
… on zeolitic imidazolate framework-8 (CO2 – ZIF-8), and O2 adsorption on ZIF-8 (O2 – ZIF-8). Each of these systems offers a unique study of the relationship between the physical properties of the adsorbate and substrate and the effects of these properties on the thermodynamics and kinetics of …
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Synthesis and Characterisation of new materials formed from metal-organic frameworks and glasses
… derived from zeolitic imidazolate frameworks (ZIFs). A ZIF that has exhibited remarkable glass forming ability is ZIF-62, [Zn(Im)1.75(bIm)0.25] where Im is imidazolate and bIm is benzimidazolate. Several studies have investigated composite formation with ZIF-62 as one of the components. …
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Zirconium-based metal-organic frameworks as drug delivery systems
… no toxicity was observed for PEGylated UiO-66, ZIF-8 and PCN-222. The expression of inflammatory cytokines was also examined, where elevated IL-6 was observed for cells treated with PEGylated ZIF-8, a zinc-based MOFs. In summary, Zr-based MOFs have shown many promises to deliver drugs in vitro. …
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Adsorption Behavior of Volatile Organic Compounds in Metal -Organic Frameworks
… was applied to a commercially available MOF, ZIF-8, with greatly different geometric and chemical properties from the other MOFs. A molecular-sieving effect was observed preventing the adsorption of branched-alkanes, aromatics, and heavily halogenated compounds. Hydrogen-bonding interactions …
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Investigation of the potential catalytic activities of several metal organic framework (MOF) materials
… MOFs including zeolitic imidazolate framework-8 (ZIF-8), Ni(FA) and Zn(FA). These MOFs are used as catalyst supports for iron or platinum nanoparticles. The catalysts are prepared using incipient wetness impregnation method and characterized with Brunauer-Emmett-Teller (BET), pulse chemisorption, …
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Aplicação de redes metalorgânicas (MOFs) funcionalizadas com óxido de grafeno em processos de remoção de metais pesados na água
… Cu₃(BTC)₂ e Zeolitic Imidazolate Framework (ZIF-8) funcionalizadas com óxido de grafeno (GO): HKUST-1@GO e ZIF8@GO, respectivamente. Os materiais porosos e de boa estabilidade obtidos foram caracterizados por espectroscopia no infravermelho com transformada de Fourier (FTIR), espectroscopia …
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Carbon Dioxide Capture Conversion via Calgary Framework CALF-20: Catalytic Process design and Optimization
… (zeolitic imidazolate framework-8, ZIF-8), were investigated for CO?RR in an alkaline flow cell electrolyzer. In Chapter 5, we synthesized a composite of photoactive TiO?/MOF material for CO? capture and photoconversion. The TiO?/MOF composites were implemented in a photocatalytic …
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Ab Initio Study of Amorphous Zeolitic Imidazolate Framework (A-ZIF) and Pyrophosphate crystals
Zeolitic imidazolate frameworks (ZIFs) are a rapidly emerging class of versatile porous material with many potential applications. Here, we report the construction of an amorphous ZIF (a-ZIF) model from a near-perfect continuous random network model of a-SiO₂. The radial distribution function is in …
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Amorphisation Mechanisms of Metal-Organic Frameworks under High Pressures and Temperatures
… (UiO-66, MOF-808 and NU-1000) and zinc-based (ZIF-8, ZIF-4 and ZIF-62). The methods chosen for investigation were hydrostatic compression, non-hydrostatic compression, and ball-milling, as they are all used for industrial processing of powders: The former two are methods for shaping, and the …
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Metal–organic framework based non-precious metal electrocatalysts for the oxygen reduction reaction
… the use of the zeolitic imidazolate framework ZIF-8 as a model precursor to understanding the role of temperature on the conversion of metal organic frameworks (MOFs) to an active catalyst. The experimental data together with the DFT calculations suggests that the proximity of …
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Mechanochemical approaches to MOF glasses and the thermal response of amorphous MOFs
… to the zeolitic imidazolate framework (ZIF) known as ZIF-62, (cag topology, consisting of M2+ and imidazolate linkers) results in the formation of a ZIF liquid. Cooling of this liquid leads to vitrification of the ZIF, i.e. production of an amorphous ZIF, or more specifically ZIF glass. …
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Reactive solids under shock compression
… are tetrathiofulvalene/chloranil cocrystals and ZIF-8, a zinc imidizolate metal organic framework.
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Understanding the Chemistry and Mechanical Properties of Metal-Organic Framework-Polymer Composites
… strength. Zeolitic imidazolate frameworks (ZIFs), a subdivision of MOFs, were chosen as the template owing to their facile synthesis, structural diversity, and high crystallinity. Two types of micron-sized ZIFs, ZIF-8 with Zn2+ node and ZIF-67 with Co2+ node, were synthesized to compare the …
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Adsorption behavior of volatile organic componds in metal-organic frameworks
… was applied to a commercially available MOF, ZIF-8, with greatly different geometric and chemical properties from the other MOFs. A molecular-sieving effect was observed preventing the adsorption of branched-alkanes, aromatics, and heavily halogenated compounds. Hydrogen-bonding interactions …