Spray drying of zeolitic imidazolate frameworks: investigation of crystal formation and properties

Chaemchuen, Somboon; Zhou, Kui; Mousavi, Bibimaryam; Ghadamyari, Marzieh; Heynderickx, Philippe M.; Zhuiykov, Serge; Yusubov, Mekhman S.; Verpoort, Francis

doi:10.1039/c8ce00392k

Cited by 41 publications

(26 citation statements)

References 39 publications

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“…Typically there is an initial weight loss of 5–10 % between 70–150 °C which corresponds to the release of non‐coordinated water molecules or solvent adsorbed within the pores, followed by a second weight loss around 200 °C, that could be attributed to the desorption of chemically or more strongly bound solvent molecules. This is more clearly seen with the ZIF‐67 spheres, what could be also due to dissociation of not‐bridging HMeIm ligand molecules (protonated) [33] . A more pronounced process was observed between 300–500 °C which involved ligand volatilization, ligand condensation, polymerization, etc [34] .…”

Section: Resultsmentioning

confidence: 99%

“…It also indicated that the nucleation initiates on specific sites, such as grain boundaries or impurities (heterogeneous nucleation) [13] . Upon evaporation of Co acetate and HMeIm solutions (6/8 molar ratio, in water) in a spray dryer, amorphous spheres of several micrometers size were obtained [33] . Upon immersion of these particles in methanol, they were recrystallized/reorganized producing the ZIF‐67 dodecahedral particles.…”

Section: Resultsmentioning

confidence: 99%

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The Influence of Particle Size and Shape in Cobalt 2‐Methylimidazolate Polymers on Catalytic Properties

Díaz-Duran

Roncaroli

2021

Eur J Inorg Chem

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The reaction products between in situ generated Co(OH)2 and 2‐methylimidazole were studied and characterized. Using 9 fold excess of ligand, the well studied polyhedral (dodecahedral) particles (1–3 μm diameter) of the zeolitic imidazolate framework were obtained, i. e. ZIF‐67. When a stoichiometric amount of 2‐methylimidazole was employed, amorphous spheres of ca 500 nm diameter were obtained with low dispersion in size. Both samples were pyrolyzed at 700 and 900 °C under inert atmosphere. The external morphology was kept, however TEM images of the spherical particles showed that they were mainly composed of carbon nanotubes. Co nanoparticles embedded in the carbonaceous matrix could be observed in both samples. The activity of the pyrolyzed (700 and 900 °C) acid leached samples towards the Oxygen Reduction Reaction was studied. Upon the same thermal treatment both types of samples showed similar electrokinetic parameters.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Influence of Particle Size and Shape in Cobalt 2‐Methylimidazolate Polymers on Catalytic Properties

Díaz-Duran

Roncaroli

2021

Eur J Inorg Chem

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“…The hybrid organic-inorganic compounds with 5SSA also display a moderate crystallinity with the exception of partially amorphous Fe 2 (H2O)4(5SSA)3•DMF. The formation of amorphous intermediates or the end products is rather unusual in the common synthesis of such type compounds [17][18][19].…”

Section: Resultsmentioning

confidence: 99%

Solvothermally derived Me2(H2O)4(5SSA)3·DMF and Me2(H2O)4(4NSA)2·DMF: Application as Biginelli reaction catalysts

Laurikenas¹,

Yalçın²,

Žilinskas³

et al. 2019

chemija

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The solvothermal synthesis between Me(NO3)x ∙ yH2O (Mex+ = Fe3+, Ni2+, Mn2+, Co2+, Cu2+) and respectively 4-nitrosalycilic (4NSA) and 5-sulfosalicylic (5SSA) acids produced hybrid organic-inorganic compounds composed of Mex+ ions and organic fragments which include three different functional groups, carboxylic, hydroxyl and sulfonic, each coordinated to the Mex+ ions. The phase and chemical composition, microstructure and properties of Me2(H2O)4(5SSA)3·DMF and Me2(H2O)4(4NSA)2·DMF (DMF – dimethylformamide) hybrid compounds were evaluated and discussed. The synthesised materials were characterised by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and nuclear magnetic resonance (NMR) spectroscopy. The catalytic properties of the obtained compounds were also investigated.

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“…Among MOF materials, the stable MOF, UiO-66, with zirconium (Zr 6+ ) cluster bridging with 12-linkers (terephthalic acid, BDC), was applied as a catalyst for the direct DMC synthesis from methanol and CO 2 [101]. Moreover, the unique properties of this material and the high porosity have the ability to adsorb more CO 2 over the metal oxide catalyst and increase the concentration of CO 2 around the catalytic active centers [102][103][104]. The Lewis acid sites deriving from zirconium metals in UiO-66 act as active sites for the catalytic production of DMC [105].…”

Section: Metal-organic Frameworkmentioning

confidence: 99%

Progress on Catalyst Development for Direct Synthesis of Dimethyl Carbonate from CO2 and Methanol

et al. 2019

Self Cite

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The reaction of carbon dioxide transformation is tremendously interesting in research societies from the viewpoint of carbon resource and also to resolve the environmental problem of carbon dioxide emission. Carbon dioxide (CO 2) is a suitable C1 feedstock which can be converted into a number of valuable fine chemicals. The utilization of CO 2 not only helps to reduce the carbon emission but should also lead to economic benefits, if CO 2 is converted into chemicals for which there are significant demands or have a high added value. The reaction of CO 2 with methanol is one of the pathways to directly synthesize dimethyl carbonate. However, the catalyst is a key factor in the reaction development. Herein, in this review, the focus is made on materials for the catalyzed reaction for the direct synthesis of dimethyl carbonate (DMC) from CO 2 and methanol. The developed catalysts (homogeneous and heterogeneous catalysts) used so far are discussed, together with the respective operating conditions to obtain the optimum catalyst performance. Interesting ideas to allow the direct synthesis of carbonate products from CO 2 with methanol using developed novel catalysts with high performance and efficiency for the economy are offered in this review.

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Spray drying of zeolitic imidazolate frameworks: investigation of crystal formation and properties

Abstract: The mechanism of crystal growth for ZIFs (ZIF-67 and Zn/Co-ZIF) is explored for the first time using the spray-drying technique.

Cited by 41 publications

References 39 publications

The Influence of Particle Size and Shape in Cobalt 2‐Methylimidazolate Polymers on Catalytic Properties

The Influence of Particle Size and Shape in Cobalt 2‐Methylimidazolate Polymers on Catalytic Properties

Solvothermally derived Me2(H2O)4(5SSA)3·DMF and Me2(H2O)4(4NSA)2·DMF: Application as Biginelli reaction catalysts

Progress on Catalyst Development for Direct Synthesis of Dimethyl Carbonate from CO2 and Methanol

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