Enhanced Active Sites and Stability in Nano‐MOFs for Electrochemical Energy Storage through Dual Regulation by Tannic Acid

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(41)

Опубликована: Авг. 21, 2023

The limited active sites and poor acid-alkaline solution stability of metal-organic frameworks (MOFs), significantly limit their wider application. In this study, the acid property tannic (TA) was used as an etchant to etch surface-active sites. Subsequently, further chelation protonated TA with exposed metal site can effectively protect ions. Meanwhile, provided a large amount phenolic hydroxyl groups, which greatly improve imidazolate-coordinated MOFs. electrochemical test results indicated that MOFs composite materials synthesized using scheme had high specific capacitance stability. And mechanism its reaction process explored through in situ X-ray diffraction (XRD) theoretical calculations. addition, same treatment carried out series carboxyl-coordinated MOFs, confirmed principle obtain higher This paper explains functionalization nano-MOFs by polyphenolic compounds, providing new ideas for research nano-MOFs.

Язык: Английский

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Direct Assembly of Metal‐Phenolic Network Nanoparticles for Biomedical Applications

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(45)

Опубликована: Окт. 6, 2023

Coordination assembly offers a versatile means to developing advanced materials for various applications. However, current strategies assembling metal-organic networks into nanoparticles (NPs) often face challenges such as the use of toxic organic solvents, cytotoxicity because synthetic ligands, and complex synthesis procedures. Herein, we directly assemble NPs using metal ions polyphenols (i.e., metal-phenolic (MPNs)) in aqueous solutions without templating or seeding agents. We demonstrate role buffers (e.g., phosphate buffer) governing NP formation engineering physicochemical properties tunable sizes from 50 270 nm) by altering conditions. A library MPN is prepared natural ions. Diverse functional cargos, including anticancer drugs proteins with different molecular weights isoelectric points, are readily loaded within applications biocatalysis, therapeutic delivery) direct mixing, surface modification, owing strong affinity guest molecules. This study provides insights mechanism complexes simple strategy engineer nanosized desired diverse biotechnological

Язык: Английский

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Supramolecular metallic foams with ultrahigh specific strength and sustainable recyclability

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Май 29, 2024

Язык: Английский

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Desirable Strong and Tough Adhesive Inspired by Dragonfly Wings and Plant Cell Walls

ACS Nano, Год журнала: 2024, Номер 18(13), С. 9451 - 9469

Опубликована: Март 7, 2024

The production of wood-based panels has a significant demand for mechanically strong and flexible biomass adhesives, serving as alternatives to nonrenewable toxic formaldehyde-based adhesives. Nonetheless, plywood usually exhibits brittle fracture due the inherent trade-off between rigidity toughness, it is susceptible damage deformation defects in applications. Herein, inspired by microstructure dragonfly wings cross-linking structure plant cell walls, soybean meal (SM) adhesive with great strength toughness was developed. strategy combined multiple assembly system based on tannic acid (TA) stripping/modification molybdenum disulfide (MoS2@TA) hybrids, phenylboronic acid/quaternary ammonium doubly functionalized chitosan (QCP), SM. Motivated wings, MoS2@TA tightly bonded SM framework through Schiff base hydrogen bonding dissipate stress energy crack deflection, bridging, immobilization. QCP imitated borate chemistry walls optimize interfacial interactions within ester bonds, boron–nitrogen coordination electrostatic sacrificial bonding. shear SM/QCP/MoS2@TA were 1.58 MPa 0.87 J, respectively, which 409.7% 866.7% higher than those pure adhesive. In addition, gave good mildew resistance, durability, weatherability, fire resistance. This bioinspired design offers viable sustainable approach creating multifunctional tough biobased materials.

Язык: Английский

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Regulating Contact Electrification and Charge Retention Capability With Metal–Organic Frameworks in Triboelectric Nanogenerator for Self‐Powered Sewage Treatment

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract The harvesting of ocean wind energy for triboelectric nanogenerators (TENGs) is greatly influenced by the contact electrification (CE) capability, charge retention characteristics, and harsh marine environment. In this work, four highly water‐stable metal–organic frameworks, including MIL‐101(Cr), UiO‐66, ZIF‐8, MOF‐303, are doped into PVA/Ta layers to modulate their CE retention, resistance environments. capability compared at multiple scales electronic, atomic, molecular levels using DFT calculation. combined effect pyrazole ring ─COO─ group contributes highest tribopositivity PVA/Ta/MOF‐303. Besides, reduced HOMO–LUMO gap increased HOMO level make it easier electrons in PVA/Ta/MOF‐303 transfer. Meanwhile, MOF‐303 with high capture located deep can serve as traps reduce dissipation rate. Hence, density PVA/Ta/MOF‐303‐based TENG (PTM‐TENG) 90% RH reaches 361.43 µC m −2 . Hydrogen bonding, coordination effects, electrostatic interactions endow excellent mechanical, anti‐swelling, anti‐aging properties. Finally, PTM‐TENG assembled a self‐powered sewage treatment system, generation ·OH ·O 2 − enables realize water sterilization rate (99.99%) efficient organic pollutant degradation (>95%) within 20 min.

Язык: Английский

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Enhanced Active Sites and Stability in Nano‐MOFs for Electrochemical Energy Storage through Dual Regulation by Tannic Acid

Angewandte Chemie, Год журнала: 2023, Номер 135(41)

Опубликована: Авг. 21, 2023

Abstract The limited active sites and poor acid‐alkaline solution stability of metal–organic frameworks (MOFs), significantly limit their wider application. In this study, the acid property tannic (TA) was used as an etchant to etch surface‐active sites. Subsequently, further chelation protonated TA with exposed metal site can effectively protect ions. Meanwhile, provided a large amount phenolic hydroxyl groups, which greatly improve imidazolate‐coordinated MOFs. electrochemical test results indicated that MOFs composite materials synthesized using scheme had high specific capacitance stability. And mechanism its reaction process explored through in situ X‐ray diffraction (XRD) theoretical calculations. addition, same treatment carried out series carboxyl‐coordinated MOFs, confirmed principle obtain higher This paper explains functionalization nano‐MOFs by polyphenolic compounds, providing new ideas for research nano‐MOFs.

Язык: Английский

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Lightweight, mechanically robust and scalable cellulose-based foam enabled by organic-inorganic network and air drying

Chemical Engineering Journal, Год журнала: 2024, Номер 491, С. 152014 - 152014

Опубликована: Май 7, 2024

Lightweight and high-strength cellulose-based foams have gained increasing momentum due to their combination of sustainability high performance. However, complex modification cellulose fibers can sacrifice the environmental friendliness further limit productional scalability. Here, we engineer lightweight yet strong made from mechanically treated microfibrillated (MFC), reinforced by organic-inorganic network, scaled surfactant foaming combined with air drying. Consisting coordination extensive secondary interaction within resulting composite achieve both a compressive modulus 451.3 kPa yield strength 25.1 at low density 32.9 mg cm−3, which exceed other MFC-based based on foaming. In addition, incorporation network has no negative effect scalability, recyclability, or biodegradability composites foam, making closed-loop material recycling possible. The life-cycle assessment reveals that replacing petroleum-based our result in substantial reductions carbon emissions. structural design manufacturing foam stimulate market interest for development bioeconomy.

Язык: Английский

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Covalent organic framework membranes reconstructed pore channels through metal-phenolic complexation for dye/salt separation

Journal of Membrane Science, Год журнала: 2024, Номер 705, С. 122907 - 122907

Опубликована: Май 19, 2024

Язык: Английский

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An Antibiotic Nanobomb Constructed from pH‐Responsive Chemical Bonds in Metal‐Phenolic Network Nanoparticles for Biofilm Eradication and Corneal Ulcer Healing

Advanced Science, Год журнала: 2024, Номер 11(22)

Опубликована: Март 15, 2024

In the treatment of refractory corneal ulcers caused by Pseudomonas aeruginosa, antibacterial drugs delivery faces drawbacks low permeability and short ocular surface retention time. Hence, novel positively-charged modular nanoparticles (NPs) are developed to load tobramycin (TOB) through a one-step self-assembly method based on metal-phenolic network Schiff base reaction using 3,4,5-trihydroxybenzaldehyde (THBA), ε-poly-ʟ-lysine (EPL), Cu

Язык: Английский

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A Robust, Biodegradable, and Fire‐Retardant Cellulose Nanofibers‐Based Structural Material Fabricated from Natural Sargassum

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract With increasing concern about the environmental pollution of petrochemical plastics, people are constantly exploring environmentally friendly and sustainable alternative materials. Compared with materials, cellulose has overwhelming superiority in terms mechanical properties, thermal cost, biodegradability. However, flammability hinders its practical application to a certain extent, so improving fire‐retardant properties nanofiber‐based materials become research focus. Here, nanofiber alginate extracted from abundant natural sargassum as high‐strength nanoscale building blocks, then structural material is prepared through bottom‐up hydrogel layer‐by‐layer method. The obtained incorporate excellent (≈297 MPa), stability (≈200 °C), low expansion coefficient (≈7.17 × 10 −6 K −1 ), properties. This work largely improves utilization seaweed residue polymers, providing bio‐based strategy, wide range development prospects field fiber‐based high‐performance future.

Язык: Английский

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