Relevant bibliographies by topics / Zeolitic imidazolate framework (ZIF)

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Academic literature on the topic 'Zeolitic imidazolate framework (ZIF)'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Zeolitic imidazolate framework (ZIF)"

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Chhetri, Kisan, Anup Adhikari, Jyotendra Kunwar, et al. "Recent Research Trends on Zeolitic Imidazolate Framework-8 and Zeolitic Imidazolate Framework-67-Based Hybrid Nanocomposites for Supercapacitor Application." International Journal of Energy Research 2023 (September 8, 2023): 1–46. http://dx.doi.org/10.1155/2023/8885207.

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Recently, Zeolitic Imidazolate Frameworks (ZIFs) and their hybrid composites have incited a lot of interest in the research community and have shown promising potential in supercapacitors owing to their excellent conductivity, high surface area, tunable structure, rich redox chemistry, composition diversity, etc. Even though many ZIFs are being studied for the advancement of electrode materials used for energy storage applications, in this review, we are focused on ZIF-8 and ZIF-67 only. The electrochemical performance of pure ZIFs is poor due to low electronic conductivity and poor cycling life. To counter this, ZIFs are mixed with other materials like conducting polymers, other transitional metals composites, and activated carbons to prepare hybrid composites. Furthermore, the highly porous structure and large surface area of the ZIFs cage act as an ideal template for designing composites with excellent supercapacitor applications. This reviewis focus on the synthesis and electrochemical performance of such materials. This review is divided into two main parts: the design and synthesis of ZIF-8 and ZIF-67 derivatives for supercapacitor applications and the electrochemical performance of ZIF-8 and ZIF-67-based derivatives in three-electrode and two-electrode setups. Lastly, the challenges and obstacles encountered while employing ZIF-8 and ZIF-67-based composites in supercapacitors will be reviewed and commented on.
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Elmorsy, Esraa S., Ayman Mahrous, Wael A. Amer, and Mohamad M. Ayad. "Nitrogen-Doped Carbon Dots in Zeolitic Imidazolate Framework Core-Shell Nanocrystals: Synthesis and Characterization." Solid State Phenomena 336 (August 30, 2022): 81–87. http://dx.doi.org/10.4028/p-206xsy.

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Metal-organic frameworks (MOFs) have exciting properties and promising applications in different fields. In this work, novel zeolitic imidazolate frameworks (ZIFs) have been synthesized by encapsulating N-doped carbon quantum dots (N-CDs) with a blue FL into the zeolitic imidazolate framework materials core-shell structure (ZIF-8@ZIF-67). The functionalized core-shell MOFs maintained their crystal structure, morphology, and enhanced UV-vis absorbance. The properties of these new composites exhibit excellent potential for different applications including sensing, photo-catalysis, and selective adsorption.
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Jaafar, Amani, Carlos Platas-Iglesias, and Rana A. Bilbeisi. "Thiosemicarbazone modified zeolitic imidazolate framework (TSC-ZIF) for mercury(ii) removal from water." RSC Advances 11, no. 27 (2021): 16192–99. http://dx.doi.org/10.1039/d1ra02025k.

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Zeolitic imidazolate frameworks Ald-ZIF were obtained by mixing two imidazole-based linkers with zinc(ii). Post-synthetically modified Ald-ZIFs with thiosemicarbazide group improved mercury(ii) removal efficiency from water at a capacity of 1667 mg g<sup>−1</sup>.
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Escorihuela, Jorge, Óscar Sahuquillo, Abel García-Bernabé, Enrique Giménez, and Vicente Compañ. "Phosphoric Acid Doped Polybenzimidazole (PBI)/Zeolitic Imidazolate Framework Composite Membranes with Significantly Enhanced Proton Conductivity under Low Humidity Conditions." Nanomaterials 8, no. 10 (2018): 775. http://dx.doi.org/10.3390/nano8100775.

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The preparation and characterization of composite polybenzimidazole (PBI) membranes containing zeolitic imidazolate framework 8 (ZIF-8) and zeolitic imidazolate framework 67 (ZIF-67) is reported. The phosphoric acid doped composite membranes display proton conductivity values that increase with increasing temperatures, maintaining their conductivity under anhydrous conditions. The addition of ZIF to the polymeric matrix enhances proton transport relative to the values observed for PBI and ZIFs alone. For example, the proton conductivity of PBI@ZIF-8 reaches 3.1 × 10−3 S·cm−1 at 200 °C and higher values were obtained for PBI@ZIF-67 membranes, with proton conductivities up to 4.1 × 10−2 S·cm−1. Interestingly, a composite membrane containing a 5 wt.% binary mixture of ZIF-8 and ZIF-67 yielded a proton conductivity of 9.2 × 10−2 S·cm−1, showing a synergistic effect on the proton conductivity.
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Pannerselvam, Maruthasalam, Vadivel Siva, Anbazhagan Murugan, et al. "Rational Design of Core–Shell MoS2@ZIF-67 Nanocomposites for Enhanced Photocatalytic Degradation of Tetracycline." Nanomaterials 15, no. 7 (2025): 545. https://doi.org/10.3390/nano15070545.

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Zeolitic imidazolate frameworks (ZIFs) and their composites are attractive materials for photocatalytic applications due to their distinct characteristics. Core–shell ZIFs have lately emerged as a particularly appealing type of metal–organic frameworks, with improved light-absorption and charge-separation capabilities. In this study, hybrid nanocomposite materials comprising a zeolitic imidazolate framework-67 and molybdenum disulfide (MoS2) were fabricated with a core–shell structure. The prepared core–shell MoS2@ZIF-67 nanocomposites were studied using XRD, FTIR, XPS, and HR-TEM techniques. The crystalline nature and the presence of characteristic functional groups of the composites were analyzed using XRD and FTIR, respectively. The photocatalytic degradation of antibiotic tetracycline (TC) was measured using visible light irradiation. Compared to pristine MoS2 (12%) and ZIF-67 (34%), the most active MoS2@ZIF-67 nanocomposite (72%) exhibited a greater tetracycline degradation efficacy.
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Li, Laura Jiaxuan, Chun-Hung Chu, and Ollie Yiru Yu. "Application of Zeolites and Zeolitic Imidazolate Frameworks in Dentistry—A Narrative Review." Nanomaterials 13, no. 22 (2023): 2973. http://dx.doi.org/10.3390/nano13222973.

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Zeolites and zeolitic imidazolate frameworks (ZIFs) are crystalline aluminosilicates with porous structure, which are closely linked with nanomaterials. They are characterized by enhanced ion exchange capacity, physical–chemical stability, thermal stability and biocompatibility, making them a promising material for dental applications. This review aimed to provide an overview of the application of zeolites and ZIFs in dentistry. The common zeolite compounds for dental application include silver zeolite, zinc zeolite, calcium zeolite and strontium zeolite. The common ZIFs for dental application include ZIF-8 and ZIF-67. Zeolites and ZIFs have been employed in various areas of dentistry, such as restorative dentistry, endodontics, prosthodontics, implantology, periodontics, orthodontics and oral surgery. In restorative dentistry, zeolites and ZIFs are used as antimicrobial additives in dental adhesives and restorative materials. In endodontics, zeolites are used in root-end fillings, root canal irritants, root canal sealers and bone matrix scaffolds for peri-apical diseases. In prosthodontics, zeolites can be incorporated into denture bases, tissue conditioners, soft denture liners and dental prostheses. In implantology, zeolites and ZIFs are applied in dental implants, bone graft materials, bone adhesive hydrogels, drug delivery systems and electrospinning. In periodontics, zeolites can be applied as antibacterial agents for deep periodontal pockets, while ZIFs can be embedded in guided tissue regeneration membranes and guided bone regeneration membranes. In orthodontics, zeolites can be applied in orthodontic appliances. Additionally, for oral surgery, zeolites can be used in oral cancer diagnostic marker membranes, maxillofacial prosthesis silicone elastomer and tooth extraction medicines, while ZIFs can be incorporated to osteogenic glue or used as a carrier for antitumour drugs. In summary, zeolites have a broad application in dentistry and are receiving more attention from clinicians and researchers.
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Jiao, Linhong, Huixia Feng, and Nali Chen. "Halloysite@polydopamine/ZIF-8 Nanocomposites for Efficient Removal of Heavy Metal Ions." Journal of Chemistry 2023 (June 22, 2023): 1–13. http://dx.doi.org/10.1155/2023/7182712.

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In this study, polymeric nanocomposites of zeolitic imidazolate frameworks (ZIFs) were synthesized by assembly of a biomimetic polymer-polydopamine (PDA)onto halloysite nanotubes (HNTs@PDA), followed by the in situ growth of zeolitic imidazolate framework-8 (ZIF-8) on the surface of HNTs@PDA. The obtained nanocomposites (HNTs@PDA/ZIF-8) prevented agglomeration of ZIFs and increased the number of active sites derived from PDA. The factors influencing heavy metal ions (Pb2+, Cd2+, Cu2+, and Ni2+) adsorption by HNTs@PDA/ZIF-8 were discussed. The Langmuir model was able to well describe the adsorption, and the maximum adsorption capacity of HNTs@PDA/ZIF-8 was calculated to be 285.00 mg/g for Cu2+, 515.00 mg/g for Pb2+, 185 mg/g for Cd2+ and 112.5 mg/g for Ni2+. Thermodynamic parameters confirmed that the adsorption was exothermic and spontaneous. Moreover, HNTs@PDA/ZIF-8 has good regenerability, which is very important in practical applications. The adsorption mechanism study showed that electrostatic attraction, coordination reactions and ion-exchange were the main mechanisms between the adsorbents and heavy metal ions. Hence, HNTs@PDA/ZIF-8 is a promising candidate for removing heavy metal ions from wastewater.
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Yao, Jianfeng, and Huanting Wang. "Zeolitic imidazolate framework composite membranes and thin films: synthesis and applications." Chem. Soc. Rev. 43, no. 13 (2014): 4470–93. http://dx.doi.org/10.1039/c3cs60480b.

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Zhang, Chaochao, Hao Yang, Dan Zhong, et al. "A yolk–shell structured metal–organic framework with encapsulated iron-porphyrin and its derived bimetallic nitrogen-doped porous carbon for an efficient oxygen reduction reaction." Journal of Materials Chemistry A 8, no. 19 (2020): 9536–44. http://dx.doi.org/10.1039/d0ta00962h.

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Son, Ye Rim, Minseok Kwak, Songyi Lee, and Hyun Sung Kim. "Strategy for Encapsulation of CdS Quantum Dots into Zeolitic Imidazole Frameworks for Photocatalytic Activity." Nanomaterials 10, no. 12 (2020): 2498. http://dx.doi.org/10.3390/nano10122498.

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Encapsulating CdS quantum dots (QDs) into zeolitic imidazole framework-8 (ZIF-8) can offer several advantages for photocatalysis. Various types of capping agents have been used to encapsulate QDs into ZIF-8 nanopores. An effective method for encapsulating CdS QDs into ZIF-8 is to use 2-mercaptoimidazole as the capping agent. This is because 2-mercaptoimidazole is similar to the imidazolate ligands of ZIFs and can used for capping active species with simultaneous encapsulation during the crystal growth of ZIF-8. Compared to other widely used capping agents such as polyvinylpyrrolidone (PVP), using 2-mercaptoimidazole for encapsulating CdS QDs into ZIF-8 revealed photocatalytic effects along with the molecular sieving effect when using differently sized molecular redox mediators such as methyl viologen (MV2+) and diquat (DQ2+).
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Dissertations / Theses on the topic "Zeolitic imidazolate framework (ZIF)"

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Abdulla, Beyar. "Nanocellulose surface functionalization for in-situ growth of zeolitic imidazolate framework 67 and 8." Thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-417650.

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This master’s thesis was conducted at the Department of Nanotechnology and Functional Materials at Ångström Laboratory as part of an on-going project to develop hybrid nanocomposites from Cladophora cellulose and a sub-type of metal-organic frameworks; zeolitic imidazolate frameworks (ZIFs). By utilizing a state-of-the-art interfacial synthesis approach, in-situ growth of ZIF particles on the cellulose could be achieved. TEMPO-mediated oxidation was diligently used to achieve cellulose nanofibers with carboxylate groups on their surfaces. These were ion-exchanged to promote growth of ZIF particles in a nanocellulose solution and lastly, metal ions and organic linkers which the ZIFs are composed of were added to the surface functionalized and ion-exchanged nanocellulose solution to promote ZIF growth. By vacuum filtration, mechanical pressing and furnace drying; freestanding nanopapers were obtained. A core-shell morphology between the nanocellulose and ZIF crystals was desired and by adjusting the metal ion concentration, a change in morphologies was expected. The nanocomposites were investigated with several relevant analytical tools to confirm presence, attachment and in-situ growth of ZIF crystal particles upon the surface of the fine nanocellulose fibers. Both the CNF@ZIF-67 and CNF@ZIF-8 nanocomposites were successfully prepared as nanopapers with superior surface areas and thermal properties compared to pure TEMPO-oxidized cellulose nanopapers. The CNF@ZIFs showcased hierarchical porosities, stemming from the micro- and mesoporous ZIFs and nanocellulose, respectively. Also, it was demonstrated that CNF@ZIF-8 selectively adsorbed CO2 over N2. Partial formation of core-shell structure could be obtained, although a relationship between increased metal ions and ZIF particle morphology could not wholly be observed.
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Zhang, Chen. "Zeolitic imidazolate framework (ZIF)-based membranes and sorbents for advanced olefin/paraffin separations." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53422.

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Propylene is one of the most important feedstocks of the petrochemical industry with an estimated 2015 worldwide demand of 100 million tons. Retrofitting conventional C3 splitters is highly desirable due to the huge amount of thermal energy required to separate propylene from propane. Membrane separation is among the alternatives that both academia and industry have actively studied during the past decades, however; many challenges remain to advance membrane separation as a scalable technology for energy-efficient propylene/propane separations. The overarching goal of this research is to provide a framework for development of scalable ZIF-based mixed-matrix membrane that is able to deliver attractive transport properties for advanced gas separations. Zeolitic imidazolate frameworks (ZIFs) were pursued instead of conventional molecular sieves (zeolites and carbon molecular sieves) to form mixed-matrix membrane due to their intrinsic compatibility with high Tg glassy polymers. A systematic study of adsorption and diffusion in zeolitic imidazolate framework-8 (ZIF-8) suggests that this material is remarkably kinetically selective for C3 and C4 hydrocarbons and therefore promising for membrane-based gas separation and adsorptive separation. As a result, ZIF-8 was used to form mixed-matrix dense film membranes with polyimide 6FDA-DAM at varied particle loadings and it was found that ZIF-8 significantly enhanced propylene/propane separation performance beyond the “permeability-selectivity” trade-off curve for polymeric materials. Eventually, this research advanced ZIF-based mixed-matrix membrane into a scalable technology by successfully forming high-loading dual-layer ZIF-8/6FDA-DAM asymmetric mixed-matrix hollow fiber membranes with attractive propylene/propane selectivity.
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Lee, Dustin. "DEVELOPMENT OF ZEOLITIC IMIDAZOLATE FRAMEWORKS FOR ENHANCING POST-COMBUSTION CO2 CAPTURE." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2238.

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Post-combustion CO2 capture is a promising approach for complementing other strategies to mitigate climate change. Liquid absorption is currently used to capture CO2 from post-combustion flue gases. However, the high energy cost required to regenerate the liquid absorbents is a major drawback for this process. As a result, solid sorbents have been investigated extensively in recent years as alternative media to capture CO2 from flue gases. For example, metal organic frameworks (MOFs) are nanoporous materials that have high surface areas, large pore volumes, and flexible designs. A large number of MOFs, however, suffer from 1) low CO2 adsorption capacity at low pressure, which is the typical condition for flue gases, 2) degradation upon exposure to water present in flue gases, and 3) low selectivity of CO2 when present in a mixture of gases. Zeolitic Imidazolate Frameworks (ZIFs) are heavily investigated MOFs for CO2 sorption applications because they have better selectivity for CO2 compared to other MOFs and are resistant to degradation in water due to their hydrophobic nature. However, ZIFs (e.g., ZIF-8) investigated for CO2 sorption applications are typically produced using toxic solvents and their CO2 sorption capacity is drastically lower than other types of MOFs. Post-synthesis modifications with amine functional groups have been known to increase CO2 sorption capacity and selectivity within nanoporous materials. For ZIFs, previous research showed that sufficient loading with linear polyethyleneimine increased their CO2 sorption capacity. Therefore, the objectives of this research were to a) investigate the CO2 sorption capacity of ZIF-8 synthesized by solvothermal methods that use more eco-friendly solvents (e.g., methanol and water) and b) introduce post-synthetic modifications to ZIF-8 using branched polyethyleneimine (bPEI) to enhance its sorption capacity. A custom quartz crystal microbalance (QCM) system was assembled and used to measure the CO2 sorption capacity of unmodified and bPEI-modified ZIF-8 sorbent. The tests were conducted at 0.3 - 1 bar. The results showed that the unmodified ZIF-8 synthesized in methanol (ZIF-8-MeOH) had comparable crystal structure, thermal stability, surface area, and chemical properties to that of literature (Ta et.al 2018). ZIF-8-MeOH had a surface area of 1300 m2/g and a CO2 sorption capacity of 0.85 mmol CO2/g ZIF-8 @ 1 bar. This surface area and sorption capacity are comparable to those of ZIF-8 made in dimethylformamide (DMF). Therefore, ZIF-8-MeOH proved to be a worthy candidate MOF for replacing the ZIF-8 made in DMF for CO2 capture research. Water-based ZIF-8 was also synthesized in this study; however, its CO2 sorption capacity was not tested because it exhibited a significantly lower surface area (732 m2/g) compared to that of ZIF-8-MeOH. Modification of the ZIF-8-MeOH with bPEI resulted in a decrease in its CO2 sorption capacity. This undesired outcome is likely a result of insufficient bPEI load (mass attached), on ZIF-8-MeOH (~ 10% w/w) combined with the surface area lost (~ 770 m2/g) due to bPEI blocking some of the ZIF-8-MeOH pores. Therefore, the bPEI load attained in this study was not enough to compensate for the loss of surface area of the modified ZIF-8 and thus, the CO2 sorption capacity decreased. Future investigations should enhance the post-synthetic modification by increasing the loading of amine functional groups onto the eco-friendlier ZIF-8-MeOH used in this study.
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Gallaba, Gallaba Mudiyanselage Dinuka Harshana. "AN EXPERIMENTAL STUDY OF STRUCTURAL DEFORMATION AND “GATE OPENING” OF ZEOLITIC IMIDAZOLATE FRAMEWORK-8 UPON GAS SORPTION: THERMODYNAMIC AND KINETIC EVIDENCE." OpenSIUC, 2020. https://opensiuc.lib.siu.edu/dissertations/1858.

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Volumetric adsorption experiments were conducted over three sorbates in Zeolitic Imidazolate Framework – 8 (ZIF-8). The sorption isotherms were measured at low temperatures. The study included carbon monoxide sorption in ZIF-8, xenon in ZIF-8, and methane sorption in ZIF-8. As a metal-organic framework that has been investigated thoroughly for its remarkable characteristics, ZIF-8 interactions with the above three sorbates has revealed some new features. Each of these systems offered a unique opportunity to study the physical properties of the sorbate and ZIF-8 and the thermodynamic responses of the system for its unique characteristics. The fundamental understating of sorbents-sorbate not only reveals some of the remarkable properties but also opens up new frontiers for researches in practical applications such as gas storage separation and other sorption-based fields of interest. The investigation into CO-ZIF-8 system has confirmed some of the predictions made on a similar system and analysis on the ZIF-8 structure. The measured adsorption isotherms have confirmed the existence of three pre-saturation subs steps, which were explained in terms of effects from the structural transition and polarity of the sorbate. The behavior of isosteric heat of adsorption and the equilibration time revealed a strong connection between steps in the isotherm and the structural changes of ZIF-8 due to organic linker rotation and volume expansion, also known as “Gate-Opening” in some cases. In both Xe-ZIF-8 and CH4 -ZIF-8 systems, the sorption isotherms revealed two substeps before the saturation. This is the first time such a feature was resolved experimentally in these systems although many previous studies have predicted the feature. The experimental observations on characteristics of the Xe -ZIF-8 system are also verified by computer simulations. Unlike the CO-ZIF-8 system, Xe-ZIF-8 interactions do not trigger the organic linker rotation of ZIF-8 structure, but it influenced the expansion of the ZIF-8 structure. In CH4 – ZIF-8 system the isotherms’ substeps were not as steep as Xe system but the loading dependence of isosteric heat of adsorption and equilibration time revealed features that are similar to CO. The lack of sorption-combined structural analysis of CH4-ZIF-8 prevent us from concluding the actual nature of the changes occurring which are related to the substeps and other thermodynamic and kinetic features. In all three systems, our measurements of the adsorption kinetics, we observed a non-monotonic behavior of the equilibration time as a function of sorbent loading. For CO the loading dependence of equilibration time exhibit peaks at loadings that correspond to the intermediate and higher loading sub-steps, and CH4 showed similar behavior at the loading corresponds to its intermediate substep region. The sharp peaks can be interpreted as packing rearrangement of adsorbed phase molecule in both cases and for CO there may be some contributions from the linker flipping and structural transition. The structural effect of kinetics is yet to be confirmed by a structural analysis for the CH4 system.
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Keser, Nilay. "Production And Performance Evaluation Of Zif-8 Based Binary And Ternary Mixed Matrix Membranes." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614571/index.pdf.

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Mixed matrix membranes (MMMs) have gained importance because they combine the desirable properties of the polymers and the organic/inorganic filler materials and they may have a very big potential. In this study polyethersulfone (PES) was used as polymeric material, and Zeolitic Imidazolate Framework-8 (ZIF-8) was used as porous filler material, and 2-hydroxy 5-methyl aniline(HMA), was used as a third component in membrane formulation. In this study, ZIF-8 crystals were synthesized with varying particle sizes, and a novel recycling methodology was developed to improve the efficiency of ZIF-8 production. ZIF-8 nano-crystals were synthesized by a 1-hour stirring method at room temperature and characterized by X-ray diffractometer, scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS) and thermal gravimetric analysis (TGA). In order to investigate the effect of ZIF-8 loading on the membrane performance, different types of membranes were prepared with varying amounts of ZIF-8 between 10-60% (w/w). Moreover, ternary mixed matrix membranes were synthesized consisting of different amounts of ZIF-8 between 10-30% (w/w) and HMA 1-10% (w/w). Gas transport properties of the membranes were investigated by single gas permeation experiments of H2, CO2 and CH4 at 3 bar feed pressure. In order to investigate the effect of feed pressure on the gas transport properties of the membranes, single gas experiments were conducted on 3, 6, 8, 10 and 12 bar feed pressures. Moreover, binary gas permeation experiments of CO2/CH4 pair were conducted through selected membranes at 3 bar and 12 bar feed pressures. In addition to gas permeation experiments, the morphology and thermal characteristics of the membranes were characterized by SEM, TGA and differential scanning calorimetry (DSC) analysis. The incorporation of ZIF-8 crystals into continuous PES matrix resulted in high performance gas separation membranes. The permeabilities of all studied gases increased with ZIF-8 loading while the ideal selectivities showed a slight decrease compared to neat PES membrane. Highly reproducible and repeatable results were obtained up to 30 % w/w ZIF-8 loading, while membrane formulation reproducibility was decreased for higher ZIF-8 contents (&gt<br>30 w/w %). Addition of HMA improved the gas separation performances of the binary membranes significantly by decreasing permeabilities and increasing ideal selectivities. PES/ZIF-8(%20)/HMA(%7) membrane has the best separation performance for all gases among the ternary membranes. When 7 w/w % HMA was added to PES/ZIF-8(%20) membrane, H2 permeability decreased from 26.3 to 13.7 barrer, while H2/CH4 ideal selectivity increased from 61.8 to 103.7. Increasing feed pressures appreciably increased the separation performances of all membranes. While the H2 permeability is pressure independent, the CO2 and CH4 permeabilities were reduced with increasing feed pressures and the highest selectivity improvement was observed in H2/CH4 pair for all membrane compositions. For instance, when the feed pressure was increased from 3 bar to 12 bar, the percentage improvements in ideal selectivities through PES/ZIF-8(%10)/HMA(%4) membrane were calculated as 26, 69, 113 % for the H2/CO2, CO2/CH4 and H2/CH4 gas pairs<br>respectively. This results show that working at higher feed pressures will be more advantageous for separation of the studied gas pairs. The ideal selectivities and the separation factors were equal to each other for all membrane compositions both for 3 and 12 bar operating pressures.
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Risaliti, Giulio. "Determinazione della performance di membrane composite per la purificazione di gas." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22411/.

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In questo elaborato vengono presentati i risultati di una attività sperimentale incentrata sulla ricerca di membrane a matrice mista per la separazione di gas da miscele. In questo lavoro viene descritta la preparazione di membrane in polisulfone e membrane a matrice mista polisulfone con ZIF-8 a quattro diversi caricamenti percentuali, PSf+ZIF-8 2%, 4%, 8% e 16%. Vengono anche esposti i risultati delle prove di caratterizzazione di tali membrane. E' stato condotto un esame attraverso microscopia elettronica a scansione (SEM) sulla sezione e sulla superficie delle cinque membrane. Sono esposti i risultati dei test di permeazione condotti attraverso un permeometro a volume costante. Le prove sono state fatte per tutte le membrane con sei diversi gas penetranti (H2, He, O2, CO2, CH4 e N2) a tre diverse temperature (35°C, 50°C e 65°C) ottenendo i valori dei coefficienti di permeabilità, solubilità e diffusività. Sono state calcolate le selettività ideali per ogni coppia di gas per tutte le membrane e le energie di attivazione. Sono stati fatti paragoni con i risultati di letteratura e ricercate correlazioni predittive per le proprietà di trasporto delle membrane in funzione di diversi parametri.
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Gallaba, G. M. Dinuka Harshana. "STUDY OF XENON ADSORPTION ON ZEOLITIC IMIDAZOLATE FRAMEWORK - 8." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1581.

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The adsorption isotherms can be used to study the properties of a sorbent and to determine the binding energy between a sorbent and a gas that is adsorbed on it. This study that was carried out on a metal organic framework called "Zeolitic imidazolate framework-8" (ZIF-8) as the sorbent. ZIF -8 is known to have a flexible structure and it has shown structural transformation during gas adsorption, at different temperatures. During this study, ZIF-8 was explored using Xenon adsorption. The range of temperatures for the Xenon adsorption isotherms was between 138 K and 157.56 K. During the adsorption of Xenon on ZIF -8 the lowest two isotherms (138 K and 140.39 K) showed two steps. The lower pressure step represents adsorption of Xenon on the "as - produced" ZIF-8. The extra step reflects the structural transition ("gate opening") that occurs due to the re-orientation of the organic linkers in ZIF-8. These changes increase the diameter of the apertures in the structure, and allow more gas molecules to enter in to the ZIF -8 structure. The Xenon adsorption isotherms were also used to determine the effective surface area of ZIF -8 by employing the "point B" method. The binding energy between Xenon and ZIF -8 was found using the isosteric heat for Xenon on ZIF-8 at low coverage. The kinetics of the Xenon adsorption was also studied during this experiment.
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Zhuang, Jia. "Synthesis of Zeolitic Imidazolate Framework-8-Based Nanocomposites and Applications." Thesis, Boston College, 2015. http://hdl.handle.net/2345/bc-ir:104169.

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Thesis advisor: Chia-Kuang Tsung<br>Thesis advisor: Eranthie Weerapana<br>Metal-Organic Frameworks (MOFs) are crystalline porous materials constructed of metal ions and organic linkers, and have been widely utilized in gas storage, sensing, and chromatographic separation. The combination of MOF nanoparticles with other materials will broaden the utilization of MOF materials to a great extent. Several approaches for creating composites with the MOF, Zeolitic Imidazolate Framework-8 (ZIF-8), have been developed: dye and model drug molecules were encapsulated in ZIF-8 pores for potential drug delivery; mesoporous silica monolayer was epitaxially grown on the ZIF-8 surface for structural stability enhancement and hollow structure formation; UiO-66, another MOF subclass, was hierarchically encased inside ZIF-8 for double-phase gas separation and heterogeneous catalysis. By exploring the versatile ZIF-8 platform, these nanocomposites could have great applications in fields such as heterogeneous catalysis and drug delivery<br>Thesis (MS) — Boston College, 2015<br>Submitted to: Boston College. Graduate School of Arts and Sciences<br>Discipline: Chemistry
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Chen, Binling. "Zeolitic imidazolate frameworks (ZIFs) and their derivatives : synthesis and energy related applications." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/23299.

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Zeolitic imidazolate frameworks (ZIFs) represent a new and special class of metal organic frameworks comprised of imidazolate linkers and metal ions, with structures similar to conventional aluminosilicate zeolites. Their intrinsic porous characteristics, abundant functionalities as well as exceptional thermal and chemical stabilities, have led to a wide range of potential applications for various ZIF materials. Explosive research activities ranging from synthesis approaches to attractive applications of ZIFs have emerged in this rapidly developing field in the past 5 years. Moreover, ZIF materials act as outstanding templates or precursors to produce porous carbons and related nanostructured functional materials based on their high surface area, controllable structures and rich metal/organic species in their scaffolds. In this thesis, the synthesis and applications of ZIFs and their related nanostructured functional derivatives are demonstrated with special emphases on the applications in energy storage and conversion areas. In brief, this thesis presents the following research findings: 1). A cost-effective and facile preparation method for the synthesis of zeolitic imidazolate framework-8 (ZIF-8) material has been developed. ZIF-8 can be obtained from stoichiometric precursors in aqueous ammonia solution without any other additives at room temperature. The structures, particle sizes and textural properties of the resulting ZIF-8 materials can be controlled by the concentration of aqueous ammonia. In addition, the formation of ZIF-8 can be remarkably affected by different types of anions. The anion effect capacity is revealed to be SO42- > CH3COO- > Cl- > Br- > NO3-, which follows the classic Hofmeister anion sequence. 2). Composites containing ZIF-8 and various contents of graphene oxide (GO) have been successfully prepared for the first time by using an in-situ method in aqueous ammonia solution. Different material characterization techniques confirm the formation of strong interactions between ZIF-8 and GO in the resulting composites. The crystal sizes and the textural properties of the synthesized composites can be modulated by control of the added amount of GO. Interestingly, the in-situ synthesized composites exhibit enhanced CO2 adsorption energy and significant CO2 storage capacity. A mechanism has been proposed accordingly to the strong interactions and the synergistic effect between ZIF-8 and GO. 3). Apart from the investigation of ZIFs themselves, exploration of ZIF derivatives has been carried out in this thesis. Homogeneously-dispersed ZnO nano-particles embedded within N-doped porous carbon matrix using ZIF-8 as a template and precursor have been successfully synthesized by a simple one-step water steam carbonization route. The as-synthesized ZnO/C-S-S and ZnO/C-S-L exhibit high CO2 uptake capacities, CO2 selectivity, and CO2 adsorption energy. The mechanism of enhanced CO2 adsorption energy has been proposed and discussed. Moreover, because of excellent adsorption and degradation abilities, these ZnO/C-S-S and ZnO/C-S-L composites are highly efficient for methylene blue (MB) removal from wastewater under visible-light irradiation. Kinetics studies of MB removal show that the adsorption process is dominated by a pseudo-second-order adsorption model. 4). In addition, ZIF-67 derivatives ranging from cobalt-embedded porous N-doped carbon/carbon nanotubes to hollow carbon nano-onions under different carbonization temperatures have been prepared. The carbonization temperature effects on the morphology and electrocatalytic properties of resultants are well studied. An optimum carbonization temperature at 800 oC for electrocatalytic performance was proposed within the range 600-2000 oC. Due to the hierarchical porous carbon structure, N-doping effect and the homogeneous cobalt dispersion, the as-synthesized sample Co@C-800 nanocomposite exhibits excellent catalytic activities for both Oxygen reduction reaction (ORR) and Oxygen evolution reaction (OER) with good stability. 5). Further development of the other ZIF-67 derivatives has been investigated. Homogeneously dispersed cobalt sulfide/N, S co-doped porous carbon nanocomposites and nickel promoted cobalt sulfides/N, S co-doped porous carbon have been successfully prepared by a simple and efficient method via the simultaneous carbonization and sulfurization using ZIF-67 and Ni-substituted ZIF-67 as a precursor and template, respectively. Due to the hierarchical porous carbon structure, N, S co-doping effect and the homogeneous nanoparticle dispersion, the as-synthesized nanocomposites exhibit excellent catalytic activities for both ORR and Oxygen evolution reaction OER with good stability.
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Self, Katherine. "Non-classical growth mechanisms of functional inorganic crystals." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/12012.

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This project relates to the non-classical growth of inorganic crystals with interesting morphologies that are highly desirable in industry. All crystals were synthesized via hydrothermal or solvothermal methods and their growth was studied by stopping each reaction at a range of different times, extracting the particles and analysing them using a variety of characterisation techniques. The main techniques used were scanning electron microscopy and transmission electron microscopy but other techniques, such as powder X-ray diffraction and thermal gravimetric analysis, were also employed. Decorated ZnO microstadiums were studied where ZnO nanocones coat the inner and outer columnar walls of ZnO microstadiums. It was revealed that the polymer in the synthetic solution enhanced the aggregation of nanocrystallites of precursor ions on the microstadium surfaces, which then underwent recrystallization, forming ZnO nanocones. The presence of organic agents was also found to be crucial in the non-classical growth mechanisms of CaCO₃ and RHO-ZIF crystals as the presence of charged groups on the organic molecules led to the aggregation of precursor molecules/ions, preventing classical growth. The disordered aggregates underwent surface recrystallization, forming ‘core-shell' structures where a thin layer of single crystal encased a disordered core. Over time the crystallisation extended from the surface inwards, towards the core, until true single crystals were formed. Organic molecules were also shown to play a role in the non-classical growth of 8-branched Cu₂O structures. In this case, however, studies of the electronic configuration of the main terminating facets of Cu₂O crystals revealed another key factor in their non-classical growth. Terminating hydroxyl groups on the Cu₂O surfaces could have different charges depending on the number of Cu⁺ ions they were coordinated to. The terminating {111} faces were the only ones to be coated with negatively charged hydroxyl groups, which explained the rapid growth on these surfaces as they were able to attract the positively charged metal/polymer precursor clusters. This new phenomenon was also found to be the main driving force in the rapid growth of branches in snowflake-like Fe₂O₃ crystals despite no organic agent being used. In this case, the {11-20} faces of the seed crystals had positively charged hydroxyl groups that were able to rapidly attract the negatively charged [Fe(CN) ₆]³⁻ ions in the aqueous solution.
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Book chapters on the topic "Zeolitic imidazolate framework (ZIF)"

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Mahmad, Afzan, Maizatul Shima Shaharun, Zakariyya Uba Zango, Teh Ubaidah Noh, and Bahruddin Saad. "Adsorptive Removal of Bisphenol A Using Zeolitic Imidazolate Framework (ZIF-8)." In Proceedings of the 6th International Conference on Fundamental and Applied Sciences. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4513-6_11.

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Hulagabali, Mallikarjun Murigeppa, and Gaurang Rajendra Vesmawala. "Synthesis and Application of Zeolitic Imidazolate Framework (ZIF-8) in Cement Composites." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-6603-1_26.

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Mehta, Tushar, Prakash Chand, and Swati Sharma. "Recent Advancement in Zeolitic Imidazolate Framework-8-Derived Zinc Oxide as Supercapacitor Electrode Material." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-0861-4_19.

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"Zeolitic Imidazolate Framework-8." In Encyclopedia of Membranes. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-44324-8_100266.

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Lourenço, Annaíres de A., and Fausthon F. da Silva. "Zeolitic imidazolate framework 67 based metal oxides derivatives as electrocatalysts for oxygen evolution reaction." In Heterogeneous Catalysis. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-323-85612-6.00017-6.

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Conference papers on the topic "Zeolitic imidazolate framework (ZIF)"

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Fufaeva, Victoria A., and Tatiana E. Nikiforova. "Preparation of a sorbent based on chitosan and nickel 2- ethylimidazolate for highly efficient removal of copper ions from aqueous solutions." In INTERNATIONAL SCIENTIFIC-TECHNICAL SYMPOSIUM (ISTS) «IMPROVING ENERGY AND RESOURCE-EFFICIENT AND ENVIRONMENTAL SAFETY OF PROCESSES AND DEVICES IN CHEMICAL AND RELATED INDUSTRIES». The Kosygin State University of Russia, 2021. http://dx.doi.org/10.37816/eeste-2021-2-147-149.

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A sorbent based on chitosan (CS) and nickel 2-ethylimidazolate, used in this work as zeolitic imidazolate framework (ZIF), has been prepared. The optimal conditions for obtaining a sorbent have been determined. The sorption characteristics of sorbents related to copper(II) ions have been studied.
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Sudiyarmanto, Deliana Dahnum, Siti Nurul Aisyiyah Jenie, Fauzan Aulia, Anis Kristiani, and Luthfiana Nurul Hidayati. "Nickel supported zeolitic imidazolate framework-8 (Ni/ZIF-8) catalyst: Synthesis and characterization." In XVII MEXICAN SYMPOSIUM ON MEDICAL PHYSICS. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0173186.

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Volponi, A., and S. G. Dos Santos Filho. "Carbon dioxide sensing at near infrared using zeolitic imidazolate framework-8 (ZIF-8) absorbers." In 2015 30th Symposium on Microelectronics Technology and Devices (SBMicro). IEEE, 2015. http://dx.doi.org/10.1109/sbmicro.2015.7298116.

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Hanifah, Nurul, Ni Luh Wulan Septiani, Nugraha Nugraha, Siti Nurul Aisyiyah Jenie, and Brian Yuliarto. "Zeolitic imidazolate framework 8 (ZIF-8) as sensing material for electrochemical detection of dopamine." In THE 7TH BIOMEDICAL ENGINEERING’S RECENT PROGRESS IN BIOMATERIALS, DRUGS DEVELOPMENT, AND MEDICAL DEVICES: The 15th Asian Congress on Biotechnology in conjunction with the 7th International Symposium on Biomedical Engineering (ACB-ISBE 2022). AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0199393.

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Német, Norbert, Gábor Holló, S. Farkas, et al. "SYNTHESIS OF ZEOLITIC IMIDAZOLATE FRAMEWORK-8 (ZIF-8) IN TIME-PROGRAMMED MANNER AND SOLID HYDROGELS." In 17th International Conference on Fundamental and Applied Aspects of Physical Chemistry. Society of Physical Chemists of Serbia, 2024. https://doi.org/10.46793/phys.chem24i.293n.

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One of the most widely used techniques for generating crystalline materials is wet synthesis. In this procedure, the reagents are mixed, and crystals form due to the nucleation and growth processes. In crystal growth and engineering, the most crucial is the temporal control of the processes over time to obtain samples with a desired average size and dispersity. Here, we review recent alternative methods for the synthesis of the zeolitic imidazolate framework-8 (ZIF-8). We present the chemically coded time-programmed method driven by a clock reaction. Additionally, we highlight the advantage of the application of a gel reactor utilizing diffusion and ionic migration driven by a direct electric field.
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Pelisser, Crivian, Atefeh Shokrgozar, Giovana Pelisser, Erick Emmanuel Gerardo Morales, and Daniel Eiras. "SÍNTESE E CARACTERIZAÇÃO DE ZEOLITIC IMIDAZOLATE FRAMEWORKS (ZIF) PERSPECTIVAS DE APLICAÇÃO NA INDÚSTRIA." In SIMPEX 2024 - Simpósio Internacional de Ensino Pesquisa e Extensão. Even3, 2024. http://dx.doi.org/10.29327/simpex-2024-simposio-internacional-de-ensino-pesquisa-e-extensao-430913.827023.

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Lafta, Marwa A., and Saad H. Ammar. "A study into phosphotungstic acid decorated zeolitic imidazolate framework (ZIF-67/PTA) composite for photocatalytic degradation of MV dye." In THE FOURTH AL-NOOR INTERNATIONAL CONFERENCE FOR SCIENCE AND TECHNOLOGY (4NICST2022). AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0202143.

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Ahmad, Siti Zu Nurain, Wan Norharyati Wan Salleh, Nor Hafiza Ismail, et al. "Effects of different solvents on the preparation of zeolitic imidazolate framework-8 (ZIF-8) for the removal of lead and cadmium." In II INTERNATIONAL SCIENTIFIC FORUM ON COMPUTER AND ENERGY SCIENCES (WFCES-II 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0099619.

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Behrooznia, Zahra, Abolfazl Anvari, and Rohollah Mehdinavaz Aghdam. "Fabrication of wound dressing patches based on “PVA-Gelatin” reinforced by Zeolitic imidazole framework-8 (Zif-8) nanoparticles." In 2022 29th National and 7th International Iranian Conference on Biomedical Engineering (ICBME). IEEE, 2022. http://dx.doi.org/10.1109/icbme57741.2022.10052882.

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Agbajei, T. A., Georgios N. Karanikolos, and Maryam Khaleel. "Zeolitic Imidazole Frameworks for Super Selective Separation of Propylene from Propane." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/217228-ms.

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Abstract Olefin and paraffin gases are important products of the petrochemical refining industry wherein their effective separation could provide high economic gains and competitiveness in the emerging energy markets amidst state-of-the-art technology. Important chemicals such as polyethylene and polypropylene are derived from raw materials in the form of light olefins, including ethylene and propylene, processible via naphtha cracking. However, since this leads to its production among other valuable by-products separation/refinement is required and this is commonly achieved through technical and energy-intensive cryogenic distillation due to the similarity in thermophysical properties of the process effluents. Thus, cost-effective and energy-efficient processes are required among which membrane-based separation techniques stand out. In that line, zeolitic imidazolium frameworks (ZIFs) have shown a superior potential to provide high selectivity and high permeability to particular species in a mixture they are used to refine. This superior effectiveness is attributed to ZIF's uniform pore sizes that enable sharp molecular sieving, as well as its highly porous structure that enables fast species transport through it, with minimal mass transfer hindrance for the targeted/preferably selected specie. Among ZIFs, there exists one called ZIF-8 which is especially suited to propylene/propane separation and has been widely reported for its sharp molecular sieving performance for this mixture. ZIF-8 is also distinctly stable, and relatively easy to synthesize from cheap and readily available starting materials. Recent advances in the fabrication methods reported for ZIF-8 synthesis are presented in this work, along with a comparison of the separation performance for propylene and propane resulting from different types of ZIF-8 produced by these methods. The potential effect of utilizing this ZIF material in the refining units applied for olefin/paraffin separation is also critically evaluated towards its industrial utilization.
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Reports on the topic "Zeolitic imidazolate framework (ZIF)"

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Yaghi, Omar M. Metal-organic and zeolite imidazolate frameworks (MOFs and ZIFs) for highly selective separations. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1050881.

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Musselman, Inga H. Novel Zeolitic Imidazolate Framework/Polymer Membranes for Hydrogen Separations in Coal Processing. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1091874.

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