Journal ArticleDOI
Selective gas adsorption and separation in metal–organic frameworks
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TLDR
This critical review starts with a brief introduction to gas separation and purification based on selective adsorption, followed by a review of gas selective adsorbents in rigid and flexible MOFs, and primary relationships between adsorptive properties and framework features are analyzed.Abstract:
Adsorptive separation is very important in industry. Generally, the process uses porous solid materials such as zeolites, activated carbons, or silica gels as adsorbents. With an ever increasing need for a more efficient, energy-saving, and environmentally benign procedure for gas separation, adsorbents with tailored structures and tunable surface properties must be found. Metal–organic frameworks (MOFs), constructed by metal-containing nodes connected by organic bridges, are such a new type of porous materials. They are promising candidates as adsorbents for gas separations due to their large surface areas, adjustable pore sizes and controllable properties, as well as acceptable thermal stability. This critical review starts with a brief introduction to gas separation and purification based on selective adsorption, followed by a review of gas selective adsorption in rigid and flexible MOFs. Based on possible mechanisms, selective adsorptions observed in MOFs are classified, and primary relationships between adsorption properties and framework features are analyzed. As a specific example of tailor-made MOFs, mesh-adjustable molecular sieves are emphasized and the underlying working mechanism elucidated. In addition to the experimental aspect, theoretical investigations from adsorption equilibrium to diffusion dynamics via molecular simulations are also briefly reviewed. Furthermore, gas separations in MOFs, including the molecular sieving effect, kinetic separation, the quantum sieving effect for H2/D2 separation, and MOF-based membranes are also summarized (227 references).read more
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Metal–organic frameworks with 1,4-di(1H-imidazol-4-yl)benzene and varied carboxylate ligands for selectively sensing Fe(III) ions and ketone molecules
Zhi-Qiang Liu,Yue Zhao,Xiu-Du Zhang,Yan-Shang Kang,Qingyi Lu,Mohammad Azam,Saud I. Al-Resayes,Wei-Yin Sun +7 more
TL;DR: Two new metal-organic frameworks can act as potential fluorescent materials for sensing Fe(iii) ions and different ketone molecules with high selectivity and sensitivity and MOF 1 shows selective adsorption of CO2 over N2.
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Rationalization of the entrapping of bioactive molecules into a series of functionalized porous zirconium terephthalate MOFs
Denise Cunha,Cédric Gaudin,Cédric Gaudin,Isabelle Colinet,Patricia Horcajada,Guillaume Maurin,Christian Serre +6 more
TL;DR: In this article, the authors evaluated the encapsulation performance of two different bioactive molecules, the cosmetic caffeine and the analgesic and anti-inflammatory ibuprofen, by combining impregnation and advanced characterization experimental tools in a series of microporous rigid zirconium(IV) terephthalates bearing different polar or apolar functional groups.
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Metal–Organic Framework-Derived NiSb Alloy Embedded in Carbon Hollow Spheres as Superior Lithium-Ion Battery Anodes
Litao Yu,Litao Yu,Jun Liu,Xijun Xu,Liguo Zhang,Liguo Zhang,Renzong Hu,Jiangwen Liu,Lichun Yang,Min Zhu +9 more
TL;DR: This work designs the hollow spheres Ni-MOFs with SbCl3 to synthesize NiSb⊂CHSs (NiSb-embedded carbon hollow spheres) via simple annealing and galvanic replacement reactions, meeting the requirement for the increasing demand for improved energy devices.
Journal ArticleDOI
In situ fabrication of a perfect Pd/ZnO@ZIF-8 core-shell microsphere as an efficient catalyst by a ZnO support-induced ZIF-8 growth strategy.
TL;DR: A novel ZnO support-induced encapsulation strategy is reported to efficiently fabricate a Pd/ZnO@ZIF-8 core-shell catalyst, with Pd or ZnNO as the core and Zif-8 as the shell, displaying excellent performance in terms of size-selectivity, stability and anti-poisoning in the liquid hydrogenations of alkenes.
Journal ArticleDOI
A Microporous Metal–Organic Framework with Lewis Basic Nitrogen Sites for High C2H2 Storage and Significantly Enhanced C2H2/CO2 Separation at Ambient Conditions
Hui Min Wen,Huizhen Wang,Bin Li,Yuanjing Cui,Hailong Wang,Guodong Qian,Banglin Chen,Banglin Chen +7 more
TL;DR: Owing to the combined features of high porosity, moderate pore sizes, and immobilized Lewis basic nitrogen sites, the activated ZJU-40a exhibits the second-highest gravimetric C2H2 uptake among all of the reported MOFs so far, leading to a superior MOF material for highly selective C 2H2/CO2 separation.
References
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TL;DR: This work has shown that highly porous frameworks held together by strong metal–oxygen–carbon bonds and with exceptionally large surface area and capacity for gas storage have been prepared and their pore metrics systematically varied and functionalized.
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Design and synthesis of an exceptionally stable and highly porous metal-organic framework
TL;DR: In this article, an organic dicarboxylate linker is used in a reaction that gives supertetrahedron clusters when capped with monocarboxyates.
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From molecules to crystal engineering: supramolecular isomerism and polymorphism in network solids.
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Hybrid porous solids: past, present, future
TL;DR: The state-of-the-art on hybrid porous solids, their advantages, their new routes of synthesis, the structural concepts useful for their 'design', aiming at reaching very large pores are presented.