Ionic Liquids Functionalized MOFs for Adsorption

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(16), P. 10432 - 10467

Published: July 14, 2023

Metal–organic frameworks (MOFs) and ionic liquids (ILs) represent promising materials for adsorption separation. ILs incorporated into MOF (denoted as IL/MOF composites) have been developed, composites combine the advantages of MOFs to achieve enhanced performance in adsorption-based separation fluid mixtures. The designed different are introduced various tailor their functional properties, which affect optimal adsorptive performance. In this Perspective, rational fabrication is presented, properties demonstrated. This paper provides a critical overview an emergent class termed well recent advances applications adsorbents or membranes Furthermore, gas separations (CO2 capture from flue gas, natural purification, acetylene ethylene, indoor pollutants removal) liquid (separation bioactive components, organic-contaminant removal, desulfurization, radionuclide discussed. Finally, existing challenges highlighted, appropriate design strategy direction effective exploration new proposed.

Language: Английский

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Functionalized carbon nanostructures as lubricant additives – A review

Carbon, Journal Year: 2022, Volume and Issue: 201, P. 1200 - 1228

Published: Oct. 18, 2022

In recent years, increased environmental concern and regulations have fueled a search for new lubricant additives with reduced impact. Owing to their attractive mechanical, thermal, chemical properties, carbon nanostructures been proposed as potential candidates generation of friction-modifying antiwear additives. The aim this literature review was survey systematize the growing body on topic contribute establishment better guidelines future research development subject. various can exhibit wide range identified dimensionality, structural integrity nature interactions particularly important properties governing tribological behavior nanostructures. Critical evaluation theoretical basis lubrication mechanisms revealed that several are still quite poorly understood. However, despite certain ambiguities at conceptual level, it be concluded (particularly, two-dimensional graphene-based quantum dots) promising due excellent carrier materials well-established chemistry carbon. Together, these offer routes surface functionalization endless opportunities tailoring additive properties. As result, has not only affect dispersibility but also enhance inherent nanostructure enable multifunctional

Language: Английский

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Water-Based Lubricants: Development, Properties, and Performances

Lubricants, Journal Year: 2021, Volume and Issue: 9(8), P. 73 - 73

Published: July 23, 2021

Water-based lubricants (WBLs) have been at the forefront of recent research, due to abundant availability water a low cost. However, in metallic tribo-systems, WBLs often exhibit poor performance compared petroleum-based lubricants. Research and development indicate that nano-additives improve lubrication water. Some these additives could be categorized as solid nanoparticles, ionic liquids, bio-based oils. These tribological properties help reduce friction, wear, corrosion. This review explored different water-based lubricant summarized their performances. Viscosity, density, wettability, solubility are discussed determine viability using nano-lubricants for reducing friction wear machining. liquid also environmental benefits over Further research is needed understand optimize systems completely.

Language: Английский

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Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(9)

Published: Nov. 20, 2023

Abstract Macroscale superlubricity on engineering steel surfaces offers a promising solution for minimizing friction and wear in applications. However, achieving typically requires long running‐in period, which may result significant the pair. Herein, new lubricant with superlubricating properties is rationally designed by using polyethylene glycol (PEG) critic acid (CA) under complexing effect period of about 800 s. Importantly, introduction carbon quantum dots (CQDs) obtained from pyrolysis CA into PEG aqueous shortens macroscale ( µ ≈ 0.005) between steel/steel contact to 44 The corresponding rate (1.15 × 10 −7 mm 3 N −1 m ) disk reduced 77% due shorter time. Furthermore, surface analysis combined molecular dynamics simulations demonstrates that CQDs easily adsorb pair, forming film reduces interaction energy molecules substrate. This work provides insights lubrication mechanism contributes design liquid superlubricants short periods low rates surfaces.

Language: Английский

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Ionic Liquids in Metal, Photo-, Electro-, and (Bio) Catalysis

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(9), P. 5227 - 5420

Published: April 25, 2024

Ionic liquids (ILs) have unique physicochemical properties that make them advantageous for catalysis, such as low vapor pressure, non-flammability, high thermal and chemical stabilities, the ability to enhance activity stability of (bio)catalysts. ILs can improve efficiency, selectivity, sustainability bio(transformations) by acting activators enzymes, selectively dissolving substrates products, reducing toxicity. They also be recycled reused multiple times without losing their effectiveness. based on imidazolium cation are preferred structural organization aspects, with a semiorganized layer surrounding catalyst. act container, providing confined space allows modulation electronic geometric effects, miscibility reactants residence time species. stabilize ionic radical species control catalytic dynamic processes. Supported IL phase (SILP) derivatives polymeric (PILs) good options molecular engineering greener The major factors governing metal, photo-, electro-, biocatalysts in discussed detail vast literature available over past two half decades. Catalytic reactions, ranging from hydrogenation cross-coupling oxidations, promoted homogeneous heterogeneous catalysts both single multiphase conditions, extensively reviewed considering knowledge accumulated until now.

Language: Английский

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Nature-inspired anti-fouling strategies for combating marine biofouling

Progress in Organic Coatings, Journal Year: 2024, Volume and Issue: 189, P. 108349 - 108349

Published: Feb. 28, 2024

Language: Английский

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Carbon Dots with Spatially‐Mediated‐N/S‐Co‐Doping Enabling One‐Year Stable Lubricant with Oil Leakage Detection Capability

Small, Journal Year: 2024, Volume and Issue: 20(29)

Published: Feb. 17, 2024

Abstract The dispersion stability of nano‐lubricating additives is crucial for the shelf life lubricant and its practical applications. Nitrogen–sulfur co‐doped carbon dots (N,S@CDs) via a one‐step hydrothermal method with nitropyrene thiourea as raw materials are hereby presented. N S elements selectively distributed throughout entire skeleton doping amount 22.6 at%. as‐synthesized N,S@CDs exhibit excellent in PEG200 maintain over one year. experiment results indicate that significantly improve anti‐wear friction reduction properties PEG200, while coefficient reduced from 0.25 to 0.09 1.5 wt% addition, wear volume, depth, width by 68%, 52%, 57%, respectively. good lubrication performance attributed stability, enhanced filling polishing effects, complex tribochemical reactions caused heteroatom form stable protective film on worn surface. Furthermore, as‐prepared intrinsic fluorescence intensity photoluminescence quantum yield (PLQY) 12.5% remain fluorescent during long‐term process, therefore have potential application prospect non‐destructive detection oil leakage labeling method.

Language: Английский

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Tribology in Nature: Inspirations for Advanced Lubrication Materials

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract Friction‐induced energy consumption is a significant global concern, driving researchers to explore advanced lubrication materials. In nature, vital for the life cycle of animals, plants, and humans, playing key roles in movement, predation, decomposition. After billions years evolution, natural exhibits remarkable professionalism, high efficiency, durability, intelligence, offering valuable insights designing This review focuses on mechanisms organisms advancements biomimetic soft matter It begins by summarizing common biological behaviors their underlying mechanisms, followed current design strategies The then outlines development performance these materials based different strategies. Finally, it discusses potential research directions prospects will be resource advancing

Language: Английский

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Electrical Double Layer Structure in Ionic Liquids and Its Importance for Supercapacitor, Battery, Sensing, and Lubrication Applications

The Journal of Physical Chemistry C, Journal Year: 2021, Volume and Issue: 125(25), P. 13707 - 13720

Published: June 21, 2021

Ionic liquids (ILs) have become highly popular solvents over the last two decades in a range of fields, especially electrochemistry. Their intrinsic properties include high chemical and thermal stability, wide electrochemical windows, good conductivity, polarity, tunability, solvation properties, making them ideal as for different applications. At charged surfaces such electrodes, an electrical double layer (EDL) forms when exposed to fluid. IL ions form denser EDL structures compared conventional solvent/electrolyte systems, which can cause differences behavior This Perspective discusses some recent work (over three years) where structure ILs has been examined found influence supercapacitors, batteries, sensors, lubrication systems that employ solvents. More fundamental is expected continue this area, will inform design use these applications beyond.

Language: Английский

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A review on alternative lubricants: Ionic liquids as additives and deep eutectic solvents

Journal of Molecular Liquids, Journal Year: 2021, Volume and Issue: 333, P. 116004 - 116004

Published: March 31, 2021

Language: Английский

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