Exploring the synthesis, properties, and potential of chitosan-functionalized metal-organic frameworks in emerging applications

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 148, P. 101387 - 101387

Published: Oct. 9, 2024

Language: Английский

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Inherent Ultrahigh Proton Conductivity of Two Highly Stable COOH-Functionalized Hafnium-Based Metal–Organic Frameworks

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Although there has been some recent interest in the proton conductivity (σ) of highly stable carboxyl metal–organic frameworks (MOFs) made tetravalent metal ions, given their potential applications fuel cells and electrochemical sensing, research on MOFs constructed by hafnium(IV) ions needs to be expanded significantly. Based this, we used two common easily prepared phenylpoly(carboxylic acid) ligands, 1,2,4-phenyltricarboxylic acid 1,2,4,5-phenyltetracarboxylic acid, react with hafnium tetrachloride, respectively, creating porous hafnium(IV)-based MOFs, UiO-66-COOH-Hf (1) UiO-66-(COOH)2-Hf (2), same structure as UiO-66-Hf but different numbers free carboxylic groups. A series stability assays revealed that had excellent structural rigidity, including thermal water stability. More crucially, alternating current impedance experiments demonstrate σ varies positively humidity temperature, reaching up 10–3 S·cm–1 (1: 2.83 × 2: 4.35 S·cm–1) under right conditions (98% relative 100 °C). The latter roughly doubles former, which is due difference number groups, confirmed analysis conduction mechanism investigation. high intrinsic lays a solid foundation for future application affords new inspiration developing high-performance proton-conductive materials.

Language: Английский

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Applications of Metal–Organic Frameworks and Their Derivatives in Fuel Cells

Molecules, Journal Year: 2025, Volume and Issue: 30(5), P. 981 - 981

Published: Feb. 20, 2025

Metal-organic frameworks (MOFs) and their derivatives represent a novel class of porous crystalline materials characterized by exceptional porosity, high specific surface areas, uniquely tunable physicochemical properties. These attributes render them highly promising for applications in the field fuel cells. This review provides comprehensive overview classification MOFs current as catalysts, catalyst supports, membranes Additionally, potential prospects challenges associated with using cells are discussed, aiming to advance development offer valuable insights researchers this field.

Language: Английский

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Exploring the Development of Natural Biopolymer (Chitosan)-Based Proton Exchange Membranes for Fuel Cells: A Review

Results in Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 15, P. 100218 - 100218

Published: April 12, 2024

Fuel cells use proton exchange membranes (PEMs) to transform a chemical energy into electricity. Hydrogen is the most common fuel used in cells. PEMs are selective barriers that only let protons pass through, obstructing gases and other species like electrons. A polymer electrolyte substance containing both positively negatively charged ions generally create PEMs. Nafion one perfluorinated sulfonic acid membrane, which popular This exhibits great stability, strong mechanical qualities, high conductivity. have number of issues, their propensity degrade with time, especially at temperatures presence pollutants. In order address this, researchers looking new materials methods enhance performance durability PEMs, such as adding nanomaterials, coming up architectures, establishing cutting-edge manufacturing techniques. Biopolymer based chitosan demonstrated potential be They environmentally friendly economical. However, key challenge using relatively poor ionic Researchers developed various strategies improve conductivity, doping conductive or incorporating functional groups charge transfer. Overall, has shown promise renewable sustainable for The review summarizes current development evolution chitosan-based

Language: Английский

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Icing on the Cake: Imidazole-Anchored Strategy To Enhance the Proton Conductivity of Two Isostructural Ce(IV)/Hf(IV) Metal–Organic Frameworks

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(51), P. 21309 - 21321

Published: Dec. 13, 2023

In the field of proton conduction, acquisition crystalline metal-organic frameworks (MOFs) with high stability and ultrahigh conductivity has been great research value is worth continuous exploration. Here, we greenly synthesized a three-dimensional porous MOF (MOF-801-Ce) by using [(NH4)2Ce(NO3)6 fumaric acid as starting materials solvothermally Hf-UiO-66-NO2 HfCl4 2-nitroterephthalic materials. A series measurements have shown that both MOFs exhibit good water stability, acid-base thermal demonstrate outstanding conductivity. At 100 °C 98% relative humidity (RH), conductivities (σ) could be 2.59 × 10-3 S·cm-1 for MOF-801-Ce 0.89 Hf-UiO-66-NO2. To pursue higher conductivity, further adopted evaporation approach to encapsulate imidazole molecules in pores two compounds, achieving imidazole-encapsulated MOFs, Im@MOF-801-Ce Im@Hf-UiO-66-NO2. As expected, their σ values were significantly boosted almost an order magnitude up 10-2 S·cm-1. Finally, proton-conductive mechanisms explored light structural information, gas adsorption/desorption, other tests. The these durability conduction capability manifested they promise electrochemical fields.

Language: Английский

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Incorporating flexible sulfonate-imidazolium ion pair-functionalized MOF in cross-linked polyvinyl alcohol membrane for achieving superprotonic conduction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 480, P. 148146 - 148146

Published: Dec. 16, 2023

Language: Английский

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Selective detection of food contaminants using engineered gallium-organic frameworks with MD and metadynamics simulations

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Aug. 5, 2024

The exclusion mechanism of food contaminants such as bisphenol A (BPA), Flavonoids (FLA), and Goitrin (GOI) onto the novel gallium-metal organic framework (MOF) functionalized MOF with oxalamide group (MOF-OX) is evaluated by utilizing molecular dynamics (MD) Metadynamics simulations. atoms in molecules (AIM) analysis detected different types atomic interactions between contaminant substrates. To assess this procedure, a range descriptors including interaction energies, root mean square displacement, radial distribution function (RDF), density, hydrogen bond count (HB), contact numbers are examined across simulation trajectories. most important elements stability systems under examination found to be stacking π-π HB interactions. It was confirmed significant value total energy for BPA/MOF-OX (- 338.21 kJ mol

Language: Английский

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Remarkable water-mediated proton conductivity of two porous zirconium(IV)/hafnium(IV) metal-organic frameworks bearing porphyrinlcarboxylate ligands

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 657, P. 482 - 490

Published: Dec. 7, 2023

Language: Английский

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A stable Mn(ii) coordination polymer demonstrating proton conductivity and quantitative sensing of oxytetracycline in aquaculture

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(11), P. 5034 - 5042

Published: Jan. 1, 2024

The construction and investigation of dual-functional coordination polymers (CPs) with proton conduction luminescence sensing is great significance in clean energy agricultural monitoring fields. In this work, an Mn-based polymer (Mn-CP), namely, [Mn

Language: Английский

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Nanocellulose-Based Proton Exchange Membranes with Excellent Dimensional Stability, Superior Mechanical Properties, and High Proton Conductivity via Composite MOF@CNT

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

Published: Feb. 27, 2025

Nanocellulose has shown significant potential in the field of proton exchange membranes (PEMs) because its low cost, biodegradability, excellent thermal stability, and high designability. However, development is limited by mechanical stability conductivity. In this study, cellulose nanofibers (CNFs) nanocrystals (CNCs) were blended as a composite matrix (CNF/CNC), stable metal–organic framework (MOF) with −SO3H (S-UIO-66) was prepared on surface carbon nanotubes (CNTs) via an situ growth procedure. The S-UIO-66@CNT subsequently introduced filler into CNF/CNC dispersion, PEMs formed filtration. itself exhibited certain uniform dispersion due to presence groups; incorporation CNFs/CNCs (CCs) further enhanced S-UIO-66 more unobstructed conduction pathways established membrane. As consequence, resulting PEM (CC/S-UIO-66@CNT-5) developed superior properties (93 MPa) conductivities (0.105 S/cm at 80 °C 100% RH 27 mS/cm 33% RH). addition, battery performance tests showed promising for application fuel cells.

Language: Английский

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