Innovative lignin-based MOFs and COFs for biomedicine, energy storage, and environmental remediation

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 9, 2025

Language: Английский

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Equilibrium Moisture Mediated Esterification Reaction to Achieve Over 100% Lignocellulosic Nanofibrils Yield

Small, Journal Year: 2024, Volume and Issue: 20(43)

Published: June 27, 2024

Lignocellulosic nanofibrils (LCNFs) isolation is recognized as an efficient strategy for maximizing biomass utilization. Nevertheless, achieving a 100% yield presents formidable challenge. Here, esterification mediated by the equilibrium moisture in proposed LCNFs preparation without use of catalysts, resulting exceeding 100%. Different from anhydrous chemical thermomechanical pulp (CTMP

Language: Английский

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Molecular Weaving towards Flexible Covalent Organic Framework Membranes for Efficient Gas Separations

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 8, 2024

Abstract Covalent organic frameworks (COFs) exhibit considerable potential in gas separations owing to their remarkable stability and tunable pore structures. Nevertheless, application as separation membranes is hindered by limited size‐sieving capabilities poor processability. In this study, we propose a novel molecular weaving strategy that combines hydroxyl polymers 2D TpPa−SO 3 H COF nanosheets, achieving high efficiency. Driven the strong electrostatic interactions, chains thread through pores, effectively assembling composites achieve exceptional flexibility mechanical strength. The penetrated also reduce effective size of COFs, combined with “secondary confinement effect” stemming from abundant CO 2 sorption sites channels, PVA@TpPa−SO membrane demonstrates permeance 1267.3 GPU an /CO selectivity 43, surpassing 2008 Robson upper bound limit. This facile holds promise for manufacture large‐area COF‐based small‐sized separations.

Language: Английский

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Subnanometer Nanowire‐Reinforced Construction of COF‐Based Membranes with Engineering Biomimetic Texture for Efficient and Stable Proton Conduction

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(17)

Published: Dec. 22, 2023

Abstract Achieving rapid ion transport through nanochannels is essential for both biological and artificial membrane systems. Covalent organic frameworks (COFs) with well‐defined nanostructures hold great promise addressing the above challenge. However, due to limited processability inadequate interlamellar interaction of COF materials, it extremely difficult integrate them prepare high‐performance proton conductors. Herein, inspired by ingenious bio‐adhesion strategy in nature, ultrafast conduction achieved taking advantage membranes where TP‐COF nanosheets are linked subnanometer nanowires/lignocellulosic nanofibrils composites (SNWs/LCNFs) electrostatic π‐π interactions form an ordered robust structure. Notably, synthesized SNWs exhibited impressive conductivity adhesion capacity their inbuilt phosphotungstic acid (HPW) molecules multidimensional interactions. Therefore, attributed synergistic contribution TP‐COFs SNWs, composite achieves ultrahigh (0.395 S cm −1 at 80 °C 100% RH), superior mechanical property (109.8 MPa), exceptional fuel cell performance (71.6 mW −2 ), operational stability (OCV decay rate about 1.5 mV h demonstrating outstanding competitiveness. More importantly, proposed design concept has potential be applied various electrochemical devices molecular separations.

Language: Английский

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Cu–TiO2@TpPa S-scheme heterojunction for high-efficient visible light driven hydrogen evolution

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 1143 - 1152

Published: Jan. 31, 2025

Language: Английский

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Fabrication of Sulfonated Cellulose Nanocrystal/MXene Hybrid Proton Exchange Membrane and Its Synergistic Effect in Vanadium Redox Flow Battery

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

The vanadium redox flow battery (VRFB) is an attractive technique for renewable energy storage and output, the proton exchange membrane vital component that determines performance. In this work, by incorporating sulfonated cellulose nanocrystals (SCNC)/MXene hybrids into a polymer matrix of poly vinylidene fluoride-co-hexafluoropropylene (PVDF-HFP), was designed fabricated, possessing low permeability 4.92 × 10-9 cm2 min-1, improved conductivity 15.8 mS cm-1, ion selectivity 3.21 106 S min cm-3. synergy between SCNC MXene nanosheet significantly elevates VRFB performance, yielding coulomb efficiency from 97.0% to 98.2%, voltage 83.07% 93.44%, 81.6% 90.7% at current density 40-120 mA cm-2, which are better than those commercial Nafion 212 membrane. SCNC/MXene/PVDF-HFP hybrid presents comprehensive superior performances, positioning it as promising candidate membranes in VRFBs.

Language: Английский

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Nanoporous Perfluoroalkyl and Sulfonic Acid-Functionalized Covalent Organic Frameworks with Enhanced Proton Conduction for Proton-Exchange-Membrane Fuel Cells

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Language: Английский

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Leaf-inspired hybrid membrane assembled by covalent organic framework and cellulose nanocrystals for efficient desalination

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 701, P. 122760 - 122760

Published: April 9, 2024

Language: Английский

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Trifluoroacetic acid molecules confined into/onto metal–organic frameworks using H₂btzip for efficiently improving proton conductivity using a synergistic effect

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(10), P. 2990 - 3000

Published: Jan. 1, 2024

Two outstanding proton conducting materials have been obtained by loading TFA molecules onto/into the surface or pores of MOFs. After post-treatment, their conductivity values are greatly increased under same conditions.

Language: Английский

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Continuous Ultrathin Zwitterionic Covalent Organic Framework Membrane Via Surface‐Initiated Polymerization Toward Superior Water Retention

Small, Journal Year: 2023, Volume and Issue: 20(16)

Published: Nov. 27, 2023

Abstract Efficient construction of proton transport channels in exchange membranes maintaining conductivity under varied humidity is critical for the development fuel cells. Covalent organic frameworks (COFs) hold great potential providing precise and fast ion channels. However, preparation continuous free‐standing COF retaining their inherent structural advantages to realize excellent conduction performance a major challenge. Herein, zwitterionic material bearing positive ammonium ions negative sulphonic acid developed. Free‐standing membrane with adjustable thickness constructed via surface‐initiated polymerization monomers. The porosity, continuity, stability are demonstrated transmission electron microscopy (TEM), atomic force (AFM), scanning (SEM) characterization. rigidity structure avoids swelling aqueous solution, which improves chemical stability. In higher range (50–90%), prepared exhibits superior capability compared merely group. established strategy shows application

Language: Английский

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