Tree-Inspired Aerogel Comprising Nonoxidized Graphene Flakes and Cellulose as Solar Absorber for Efficient Water Generation

Nano Letters, Год журнала: 2024, Номер 24(34), С. 10583 - 10591

Опубликована: Авг. 13, 2024

As global freshwater shortages worsen, solar steam generation (SSG) emerges as a promising, eco-friendly, and cost-effective solution for water purification. However, widespread SSG implementation requires efficient photothermal materials evaporators that integrate enhanced light-to-heat conversion, rapid transportation, optimal thermal management. This study investigates using nonoxidized graphene flakes (NOGF) with negligible defects capable of absorbing over 98% sunlight. By combining NOGF cellulose nanofibers (CNF) through bidirectional freeze casting, we created vertically radially aligned evaporator. The hybrid aerogel exhibited exceptional absorption, solar-to-thermal improved surface wettability. Inspired by tree structures, our design ensures supply while minimizing heat loss. With low content (∼10.0%), the NOGF/CNF achieves rate 2.39 kg m

Язык: Английский

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A comprehensive review on preparation and functional application of the wood aerogel with natural cellulose framework

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 275, С. 133340 - 133340

Опубликована: Июнь 24, 2024

Язык: Английский

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Emerging Photothermal Materials from Lignin and Coal for Solar Vapor Generation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract Solar vapor generation (SVG) garners significant attention as a technology for producing clean water owing to its high efficiency and zero carbon emissions. However, the widespread adoption of SVG is constrained by cost, low mechanical strength, complex fabrication processes current photothermal materials. Lignin coal, abundant in aromatic rings, C═O bonds, quinone structures, present natural advantages enhancing light absorption improving properties This review begins with an overview fundamentals strategies aimed at promoting efficiency. It then delves into structural characteristics conversion mechanisms lignin highlighting their unique contributions field. Further, latest advancements application lignin/coal‐based materials are comprehensively summarized. work not only lays systematic scientific foundation development next‐generation but also underscores potential value‐added utilization thereby contributing sustainable resource management.

Язык: Английский

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Synergistic photothermal conversion on Mn3CeOx/Coal-based carbon material membrane for simultaneous interface evaporation and organic pollutant removal

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 129573 - 129573

Опубликована: Сен. 1, 2024

Язык: Английский

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Acoustic cavitation assisted synthesis of PCDs@PVA composite film for UV shielding, intelligent pH detection, information encryption and food packing applications

Journal of Photochemistry and Photobiology A Chemistry, Год журнала: 2024, Номер unknown, С. 116162 - 116162

Опубликована: Ноя. 1, 2024

Язык: Английский

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Synergistic Effect Between 0D CQDs and 2D MXene to Enhance the Photothermal Conversion of Hydrogel Evaporators for Efficient Solar Water Evaporation, Photothermal Sensing and Electricity Generation

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 30, 2024

Abstract Solar‐powered interfacial water evaporation is a promising technique for alleviating freshwater stress. However, the performance of solar evaporators still constrained by low photothermal conversion efficiency and high enthalpy. Herein, 0D carbon quantum dots (CQDs) are combined with 2D MXene to serve as hybrid material enhance light absorption ability, meanwhile sodium carboxymethyl cellulose (CMC)/polyacrylamide (PAM) hydrogels used substrate transport reduce enthalpy evaporation. The synergistic effect in CQDs/2D materials accelerate carrier transfer, inducing efficient localized surface plasmon resonance (LSPR) effect. This results enhanced efficiency. integrated hydrogel demonstrate rate (1.93 2.86 kg m −2 h −1 under 1 2 sunlights, respectively) (1485 J g ). In addition, applied sensing temperature difference power generation (TEG). TEG device presents an output density (230.7 mW ) sunlight. work provides feasible approach regulating controlling performances evaporators, gives proof‐of‐concept design multipurpose systems.

Язык: Английский

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Advances in cellulose materials for interfacial water evaporation and their applications in seawater desalination

Desalination, Год журнала: 2025, Номер unknown, С. 118559 - 118559

Опубликована: Янв. 1, 2025

Язык: Английский

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Biomimetic Design of Breathable 2D Photothermal Fabric with Three‐Layered Structure for Efficient Four‐Plane Evaporation of Seawater

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Abstract 2D photothermal membranes have demonstrated numerous advantages in solar desalination due to their flexibility, scalability, and low cost. However, practical applications are limited by the restricted evaporation area obstructed vapor channels. A biomimetic design of breathable fabric is reported, which composed two carbon‐nanotube‐hydrogel‐coated polyester (PET) fabrics separated fiber pillars, with upper layer having a hole array as stomatal This shows high solar‐absorption efficiency (96.1%) decreased water‐evaporation enthalpy (1664.6 kJ kg −1 ). The hanging heliotropic evaporator exhibits four‐plane feature achieves rate 2.6 m −2 h under sunlight (1.0 kW ) illumination, better than traditional floated model (single‐plane, 1.6 can be further enhanced 4.2 upon introducing adscititious airflow (2 s Simultaneously, heliotropic‐hanging allows dropping concentrated brine, avoiding solid‐salt‐crystallization.

Язык: Английский

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Photothermal conversion and geochemical characterization of sulfur-rich lignite for non-conventional energy applications

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Фев. 26, 2025

Lignite has emerged as a critical material in contemporary energy portfolios, particularly electricity generation. However, this work explores lignite's potential beyond conventional uses, exploring on its conversion applications. In pioneering move, lignite samples have been directly utilized materials for photothermal applications, along with description of their geochemical features, such sulfur compositions, forms, and microscopic characteristics. Among the twenty that were geologically studied, two sulfur-rich (CS-1 CS-2) chosen to explore performance. The powder-XRD diffraction patterns CS-1 CS-2 reveal presence hexagonal phase carbon C1 kaolinite (Al2Si2O5(OH)4). Their XPS spectra indicate both organic metal-bonded sulfide moieties are present samples. implemented under 1 Sun irradiation, it was found exhibits superior light-absorbing properties, resulting enhanced water evaporation rates. addition, imaging also shows temperature increase 58.2 °C within 10 min lignite-coated membranes, compared 31 blank similar conditions. These findings can be leveraged untapped various technological domains, propelling global transition towards cleaner solutions.

Язык: Английский

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Three‐Phase Emulsion Derived Solar‐Thermal Reduced Graphene Oxide/Octadecane Phase‐Change Foam for Salt‐Resistant Day‐Night Water Evaporation

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 4, 2025

Abstract A solar‐thermal reduced graphene oxide/octadecane (RGO/oct) phase‐change foam is fabricated by the interfacial assembly of an air‐in‐oil‐in‐water three‐phase emulsion and subsequent chemical reduction oxide (GO) for day‐night evaporation desalination. The GO sheets assemble at water‐oct interfaces in presence amphiphilic alkyl glycoside while air pores are generated inside hydrophobic oct component under stirring, leading to GO/oct/air microspheres. During molding, chemically with ascorbic acid, resultant RGO/oct/air microspheres closed constitute RGO/oct foam. suppress heat conduction bulk water, prevents loss environment, hence enhancing localization capability exhibits a high rate 4.29 kg m −2 h −1 1‐sun irradiation. Interestingly, can release latent absence solar light irradiation, enabling water nighttime 2.30 . overlap molding allows rearrangement salt concentration gradients, exhibiting satisfactory resistance during stable brine 25 wt.% NaCl 10 h.

Язык: Английский

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