Experimental and molecular simulation studies of CO2 adsorption on zeolitic imidazolate frameworks: ZIF-8 and amine-modified ZIF-8

Liu, Defei; Wu, Yue; Xia, Qibin; Li, Zhong; Xi, Hongxia

doi:10.1007/s10450-012-9407-1

Cited by 133 publications

(73 citation statements)

References 51 publications

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“…The increase in the volume adsorbed at low relative pressure indicating the presence of micropores while second adsorption at high relative pressure indicating the presence of meso-and macroporosity by the packing of the particles (Liu et al 2013). The results were in good agreement with reported isotherm for ZIF-8 (Pan et al 2011;Venna 2010).…”

Section: Nitrogen Physisorptionsupporting

confidence: 81%

“…All the samples synthesized in the present work matched with the reported characteristic peaks of ZIF-8, at 2h values of 7.30 , 10.36 , 12.68 , 16.40 , and 17.98(Park et al 2006;Venna 2010;Cravillon et al 2011;Keser 2012;Liu et al 2013). The orientation and crystal face of the ZIF-8 is indicated by the main peak of XRD at (110)(Lalena et al 2007).…”

supporting

confidence: 64%

“…This was mainly due to its insufficient structural evolution, which can be observed from its XRD patterns (Figure 3a). The CO 2 adsorption mechanism on ZIF-8 can be explained by the grand canonical Monte Carlo (GCMC) simulations reported by Liu et al (2013). CO 2 gas molecules were absorbed on ZIF-8 through the three methyl rings and the six imidazole rings.…”

Section: Nitrogen Physisorptionmentioning

confidence: 99%

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Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption

Yeong

Ani

et al. 2014

Particulate Science and Technology

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Zeolitic imidazole frameworks-8 (ZIF-8) is a subclass of metal-organic frameworks (MOFs) with the transition metal cations (Zn 2þ ) linked by imidazolate anions forming tetrahedral frameworks in zeolite-like topologies. This article reports on the synthesis of ZIF-8 nanoparticles by varying the synthesis parameters at room temperature. The crystallization duration, molar ratios, and pH of the mixture solution were varied in order to study the effects of these parameters on the formation of ZIF-8 nanoparticles. The structural and morphology transformation of the resultant particles were characterized using x-ray diffraction, field emission scanning electron microscopy, and Brunauer-Emmett-Teller (BET) surface analysis. The CO 2 adsorption characteristics of ZIF-8 nanoparticles were tested using CO 2 physisorption analysis. Mature structural evolution was observed for ZIF-8 synthesized at 60 and 1440 min, but insufficient crystallization was found for ZIF-8 synthesized at 5 min. Meanwhile, ZIF-8 nanoparticles synthesized under lower amount of methanol resulted in larger particle size and higher crystallinity. Poorly intergrown ZIF-8 nanoparticles were observed for samples synthesized using a mixture solution with pH 8.2. Although different particle sizes and relative crystallinities were obtained for the ZIF-8 samples, synthesis using different molar ratios of the mixture solution, insignificant variations of BET surface areas, and CO 2 adsorption capacities were found.

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Section: Nitrogen Physisorptionsupporting

confidence: 81%

supporting

confidence: 64%

Section: Nitrogen Physisorptionmentioning

confidence: 99%

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Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption

Yeong

Ani

et al. 2014

Particulate Science and Technology

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“…To investigate the adsorption properties of the activated ZIF-8_A1 material, CO 2 and CH 4 adsorption isotherms were recorded at a broad range of high pressures at 298 K. As shown in Fig. 6, the CO 2 uptake of ZIF-8_A1 is 9.0 mmol g -1 , which is 73% higher than that of pristine C-ZIF-8 (5.2 mmol g -1 ) at 298 K, and also easily surpasses the previously reported highest value of 5.5 mmol g -1 [43], under pressures up to 3 MPa. The enhanced uptake capacity of CO 2 could be ascribed to the larger pore volume of the ZIF-8_A1 sample [42].…”

Section: Enhancement Of Co 2 /Ch 4 Adsorption and Selectivitymentioning

confidence: 60%

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Duan

Xiao

et al. 2017

Sci. China Mater.

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Hierarchical porous zeolitic imidazolate frameworks (ZIFs) have potential for adsorption, catalysis and chemical sensing applications. Ultrafast synthesis of ZIFs at room temperature and pressure is particularly desirable for large-scale industrial production. Here, we developed a green and versatile method using organic amines as supramolecular templates (organic amine-template) to rapidly synthesize hierarchical porous ZIFs (ZIF-8, ZIF-61 and ZIF-90) at room temperature and pressure. The synthesis time was reduced dramatically to within 1 min, and the resulting ZIFs had multimodal hierarchical porous structures with mesopores/ macropores interconnected with micropores. Notably, the space-time yield (STY) of hierarchical porous ZIF-8 was up to 1.29×10 4 kg m -3 d -1 , which is more than three times higher than that reported using other methods. Furthermore, the morphologies and porosities of the produced ZIFs could be readily tuned by controlling the synthesis time or type of organic amine. The organic amine played two roles in the synthesis: (1) a protonation agent to deprotonate organic ligands, facilitating the formation of ZIF crystals, and (2) an structure directing agent to direct mesopore/macropore formation. The resulting hierarchical porous ZIF-8 exhibited enhanced uptake capacities and diffusion rates for guest molecules relative to its microporous counterpart. This work provides a new direction for the green and efficient synthesis of various hierarchical porous ZIFs with high STYs for a wide range of applications.

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“…The PW91 functional combined with DNP basis set [32,33] was applied in the calculations. The convergence threshold parameters for structure optimization were set as 1 Â 10 À5 Ha (energy), 0.002 Ha/Å (force), 0.005 Å (displacement), and the real-space orbital global cutoff was set as 3.7 Å. Tetraethylenepentamine (TEPA) was used to mimic PEI on the adsorption of CO 2 under both dry and wet conditions.…”

Section: Computational Methodologymentioning

confidence: 99%

Vapor-enhanced CO2 adsorption mechanism of composite PEI@ZIF-8 modified by polyethyleneimine for CO2/N2 separation

Xian

et al. 2015

Chemical Engineering Journal

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110

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Experimental and molecular simulation studies of CO2 adsorption on zeolitic imidazolate frameworks: ZIF-8 and amine-modified ZIF-8

Cited by 133 publications

References 51 publications

Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption

Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Vapor-enhanced CO2 adsorption mechanism of composite PEI@ZIF-8 modified by polyethyleneimine for CO2/N2 separation

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Experimental and molecular simulation studies of CO2 adsorption on zeolitic imidazolate frameworks: ZIF-8 and amine-modified ZIF-8

Cited by 133 publications

References 51 publications

Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO2Adsorption

Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO2Adsorption

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Vapor-enhanced CO2 adsorption mechanism of composite PEI@ZIF-8 modified by polyethyleneimine for CO2/N2 separation

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Product

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Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption

Effect of Synthesis Parameters on the Formation of Zeolitic Imidazolate Framework 8 (ZIF-8) Nanoparticles for CO₂Adsorption