A [COF-300]-[UiO-66] composite membrane with remarkably high permeability and H<sub>2</sub>/CO<sub>2</sub> separation selectivity

S, Das; Ben, Teng

doi:10.1039/c8dt01353e

Cited by 61 publications

(47 citation statements)

References 45 publications

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“…COF-300 has also been utilized in conjunction with the zirconium-carboxylate-based MOF UiO-66 to fabricate a composite laminate where a COF-300 layer was grown on top of a prefabricated UiO-66 membrane. These composite membranes demonstrated excellent H 2 permeability as well as a highly enhanced H 2 /CO 2 selectivity, far surpassing that of the parent UiO-66 membrane 54 . Additionally, layer-by-layer synthesis of COF-300/silica composites was recently demonstrated to afford particles with potential utility as a chromatographic stationary phase 55 .…”

Section: Linkages and Modification Of 3d Cofsmentioning

confidence: 98%

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Scott

2018

Commun Chem

123

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Covalent organic frameworks, cross-linked crystalline polymers constructed from rigid organic precursors connected by covalent interactions, have emerged as a promising class of nanoporous materials owing to their highly desirable combination of attributes, including facile chemical tunability, structural diversity, and excellent stability. Despite the distinct advantages offered by three-dimensional covalent organic frameworks, research efforts have predominantly focused on the more synthetically-accessible, two-dimensional variants. Here we present an overview of synthetic approaches to yield three-dimensional covalent organic frameworks, identify synthetic obstacles that have hindered progress in the field and recently-employed methods to address them, and propose alternative techniques to circumvent these synthetic challenges. N anoporous materials have garnered tremendous interest in recent years owing to their specific and exceptional attributes, notably permanent porosity and large and accessible internal surface areas 1-5. Conventional nanoporous materials used commonly as adsorbents and heterogeneous catalysts and catalyst supports, such as zeolites and activated carbon, are based on inorganic building blocks; nevertheless, research interest in nanoporous materials bearing organic components has expanded rapidly 1,5,6. This is in part due to the exquisite structural and functional control such components provide and the flexibility they afford for designing materials specifically tailored towards the intended application 5. A large number of such nanoporous organic polymers have been fabricated in recent years, including polymers of intrinsic microporosity (PIMs) 5,6 , porous polymer networks (PPNs) 7 , and conjugated microporous polymers (CMPs) 8-10. These materials are uniformly amorphous and composed of multifunctional building blocks linked by covalent bonds, and many studies have demonstrated their synthesis and utility 7,11-13. Unfortunately, the amorphous nature of these materials can yield significant pore size dispersities, inhibiting their utilization in certain applications such as size-and shape-based gas separation and storage 2,11. Crystallinity, in contrast, is characterized by ordered structure and uniform porosity, ideal attributes for gas separation and storage, catalysis, and optoelectronic devices 2,14. Metal-organic frameworks (MOFs) are one such class of crystalline nanoporous materials that have been investigated extensively. MOFs are constructed from metal ions or clusters linked by organic

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Section: Linkages and Modification Of 3d Cofsmentioning

confidence: 98%

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Scott

2018

Commun Chem

123

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“…Therefore, these COFs with the ability to house different metals ions are suitable for catalyst utilization. [ 33,34 ] Moreover, in another strategy, introduction of OH bond to the imine‐base created a new type of COF, called MP‐DHph COF. This hydrogen‐bonding prevents water and acid from hydrolyzing the basic imine nitrogen in MP‐DHph COFs.…”

Section: Types Of Cofsmentioning

confidence: 99%

Covalent Organic Frameworks for Biomedical Applications

Esrafili

Wagner

Inamdar

et al. 2021

Adv Healthcare Materials

118

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Covalent organic frameworks (COFs) are porous organic polymeric materials that are composed of organic elements and linked together by the thermodynamically stable covalent bonds. The applications of COFs in energy sector and drug delivery are afforded because of the desirable properties of COFs, such as high stability, low density, large surface area, multidimensionality, porosity, and high‐ordered crystalline structure expanded. In this review COFs are reviewed, from the perspective of different types of reported COFs, different methods for their synthesis, and their potential applications in the biomedical field. The main goal of this review is to introduce COFs as a biomaterial and to identify specific advantages of different types of COFs that can be exploited for specialized biomedical applications, such as immune engineering.

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“…In addition, some COF-MOF composite membranes were also synthesized using a similar approach. [96][97][98] However, the separation performance of these membranes mainly depends on the interfacial amorphous zone [85] Copyright 2020, Elsevier. b) Schematic representation of the conversion of 1,3,5-Tris(4-aminophenyl)benzene (TPB)─TP─COF from imine state to amide state by the postsynthetic modification strategy.…”

Section: In Situ Growthmentioning

confidence: 99%

Covalent Organic Framework Membranes for Efficient Chemicals Separation

et al. 2021

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Membrane-based separation is an emerging technology to separate different components. [1] Owing to not only the functions of separation, concentration, and purification, but also the properties of energy efficiency, environmental friendliness, high efficiency, simplicity, manufacturing scalability, small footprint, and ease of operation and control, this technology has been widely used in chemical industry, environmental protection, medicine, food, and desalination. [2,3] Membrane is regarded as a significant method to solve the far-reaching issues such as water shortages, environmental pollution, and energy crisis.Along with the rapid industrialization and sharp increase in population, the problems of water shortages, environmental pollution, and energy crisis become more and more severe and complex, leading to the higher technology requirement for membrane separation. Although the frequently used traditional polymer membrane featured with low cost, good mechanical strength, excellent flexibility, and ease of processing, the two key parameters of permeability and selectivity that are generally used to evaluate membrane separation performance are interinhibitive because of the well-known trade-off effect. [4] One of the main reasons for the trade-off effect is the wide distribution of pore size in polymeric membranes. Therefore, materials with uniform and well-ordered pores are considered as perfect candidates for fabricating highperformance separation membranes. Keeping this in perspective, many meaningful studies have been conducted for constructing homoporous membranes [5] with traditional polymers as starting materials. The obtained membranes have a pore size ranging from 5 to 50 nm and possess great potential for ultrafiltration (UF). [6] However, in some practical application systems such as gas separation, dyes removal, protein and drug recovery as well as desalination, the kinetic dimensions of components to be separated usually are less than 5 nm. Therefore, it is very important that a homoporous structure with a pore size of less than 5 nm is constructed to be used in membrane separation.Covalent organic frameworks (COFs) [7][8][9][10][11] are an emerging class of organic porous crystalline materials with pores that range from 0.5 to 5 nm, [12,13] which are entirely composed by light elements, such as C, H, O, N, B, and Si and are connected by strong covalent bonds. Owing to the unique nature of their well-ordered and tailorable pore channels, high and permanent porosity, excellent thermostability and chemical stability, and ease of functionalization, COF materials have been demonstrated promising potential in many applications, including separation, [14] catalysis, [15] sensor, [16] optoelectronics, [17] energy conversion, [18] and semiconductors, [19] among others. Particularly, these characteristics of COF materials perfectly meet the requirements for making advanced separation membrane. For example, the uniform aperture, high porosity, and excellent stability are beneficial

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A [COF-300]-[UiO-66] composite membrane with remarkably high permeability and H₂/CO₂ separation selectivity

Cited by 61 publications

References 45 publications

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Covalent Organic Frameworks for Biomedical Applications

Covalent Organic Framework Membranes for Efficient Chemicals Separation

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A [COF-300]-[UiO-66] composite membrane with remarkably high permeability and H2/CO2 separation selectivity

Cited by 61 publications

References 45 publications

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Approaches and challenges in the synthesis of three-dimensional covalent-organic frameworks

Covalent Organic Frameworks for Biomedical Applications

Covalent Organic Framework Membranes for Efficient Chemicals Separation

Contact Info

Product

Resources

About

A [COF-300]-[UiO-66] composite membrane with remarkably high permeability and H₂/CO₂ separation selectivity