Macroscopic Ultralight Aerogel Monoliths of Imine‐based Covalent Organic Frameworks

Martín-Illán, Jesús Á; Rodríguez‐San‐Miguel, David; Castillo, Óscar; Beobide, Garikoitz; Pérez‐Carvajal, Javier; Imaz, Inhar; Maspoch, Daniel; Zamora, Félix

doi:10.1002/ange.202100881

Cited by 8 publications

(8 citation statements)

References 64 publications

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“…Very recently, the shaping of imine-based COFs into monoliths has opened new perspectives in water applications for decontamination of organic solvents and dyes [ 13 , 15 , 16 ].…”

Section: Discussionmentioning

confidence: 99%

“…Very recently, our research group has reported the synthesis of a series of monolithic aerogel imine-based COFs following a three-step method [ 15 ]. For that, in the first step, it is prepared a COF gel under mild conditions by a sol-gel process.…”

Section: Cof Processingmentioning

confidence: 99%

“…In this sense, our research group reported the use of 3 monolithic COF aerogels as a proof-of-concept for the removal of toluene from contaminated water, showing an efficiency ca. 99% [ 15 ]. The results derived from this study showed adsorption kinetics of less than 1 min and a material regeneration capacity of at least 10 cycles.…”

Section: Cofs For Water Treatmentmentioning

confidence: 99%

“…Shaping of COFs is a very important issue to be considered for the final application [ 13 , 14 ]. In this sense, recently, our research group has developed a novel strategy for the preparation of COF aerogel monoliths that were used as a proof-of-concept in the removal of organic contaminants from water [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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A Perspective on the Application of Covalent Organic Frameworks for Detection and Water Treatment

2021

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Global population growth and water resource scarcity are significant social problems currently being studied by many researchers focusing on finding new materials for water treatment. The aim is to obtain quality water suitable for drinking and industrial consumption. In this sense, an emergent class of crystalline porous materials known as Covalent-Organic Frameworks (COFs) offers a wide range of possibilities since their structures can be designed on demand for specific applications. Indeed, in the last decade, many efforts have been made for their use in water treatment. This perspective article aims to overview the state-of-the-art COFs collecting the most recent results in the field for water detection of pollutants and water treatment. After the introduction, where we overview the classical design strategies on COF design and synthesis for obtaining chemically stable COFs, we summarize the different experimental methodologies used for COFs processing in the form of supported and free-standing membranes and colloids. Finally, we describe the use of COFs in processes involving the detection of pollutants in water and wastewater treatment, such as the capture of organic compounds, heavy metals, and dyes, the degradation of organic pollutants, as well as in desalination processes. Finally, we provide a perspective on the field and the potential technological use of these novel materials.

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“…Very recently, the shaping of imine-based COFs into monoliths has opened new perspectives in water applications for decontamination of organic solvents and dyes [ 13 , 15 , 16 ].…”

Section: Discussionmentioning

confidence: 99%

Section: Cof Processingmentioning

confidence: 99%

Section: Cofs For Water Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Perspective on the Application of Covalent Organic Frameworks for Detection and Water Treatment

2021

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“…It should be noted that there have been sequential reports on the preparation of pure COF aerogels recently. − For instance, Zamora’s group reported a three-step method to produce COF aerogels . First, the COF monomers were dissolved in a large amount of acetic acid, which served as both solvent and the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Moderate and Universal Synthesis of Undoped Covalent Organic Framework Aerogels for Enhanced Iodine Uptake

Jia

Zhang

et al. 2022

Chem. Mater.

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The fabrication of hierarchically porous covalent organic framework (COF) aerogels is always challenging but of great significance in chemistry and materials science. The known COF aerogel preparation system is very limited and usually results in aerogel composite with low crystallinity. Herein, a universal and moderate synthetic strategy is presented for undoped COF aerogels through the catalysis of scandium trifluoromethanesulfonate. Due to the high catalytic activity of the scandium catalyst on aldimine condensation, densely distributed COF small crystal nuclei can be induced to be generated instantaneously under mild conditions, which leads to the immediate formation of crystalline COF gel within 5 min, whereas the traditional reaction system catalyzed by acetic acid is to form COF powder by slow accumulation of large two-dimensional lamellae. Thus, the COF morphology control based on the nucleation rate is realized. The hierarchically interconnected porous networks endow the obtained COF aerogels with enhanced adsorption performance for iodine, and the adsorption capacity can reach 8.15 g/g, which is among one of the highest iodine-sorbing values. This study provides a moderate and general method for the direct synthesis of undoped COF aerogels and has important significance for the processing and shaping of COF materials with prospective applications in efficient iodine uptake.

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Electrochemical Double‐Layer Capacitor based on Carbon@ Covalent Organic Framework Aerogels

et al. 2022

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High energy demand results in comprehensive research of novel materials for energy sources and storage applications. Covalent organic frameworks (COFs) possess appropriate features such as long‐range order, permanent porosity, tunable pore size, and ion diffusion pathways to be competitive electrode materials. Herein, we present a deep electrochemical study of two COF‐aerogels shaped into flexible COF‐electrodes (ECOFs) by a simple compression method to fabricate an electrochemical double‐layer capacitor (EDLC). This energy storage system has considerable interest owing to its high‐power density and long cycle life compared with batteries. Our result confirmed the outstanding behavior of ECOFs as EDLC devices with a capacity retention of almost 100 % after 10 000 charge/discharge cycles and, to our knowledge, the highest areal capacitance (9.55 mF cm−2) in aqueous electrolytes at higher scan rates (1000 mV s−1) for COFs. More importantly, the hierarchical porosity observed in the ECOFs increases ion transport, which permits a fast interface polarization (low τ0 values). The complete sheds light on using ECOFs as novel electrode material to fabricate EDLC devices.

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Macroscopic Ultralight Aerogel Monoliths of Imine‐based Covalent Organic Frameworks

Cited by 8 publications

References 64 publications

A Perspective on the Application of Covalent Organic Frameworks for Detection and Water Treatment

A Perspective on the Application of Covalent Organic Frameworks for Detection and Water Treatment

Moderate and Universal Synthesis of Undoped Covalent Organic Framework Aerogels for Enhanced Iodine Uptake

Electrochemical Double‐Layer Capacitor based on Carbon@ Covalent Organic Framework Aerogels

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