Polyelectrolyte Hydrogel‐Functionalized Photothermal Sponge Enables Simultaneously Continuous Solar Desalination and Electricity Generation Without Salt Accumulation

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: March 18, 2024

Abstract Technologies that can simultaneously generate electricity and desalinate seawater are highly attractive required to meet the increasing global demand for power clean water. Here, a bifunctional solar evaporator features continuous electric generation in without salt accumulation is developed by rational design of polyelectrolyte hydrogel‐functionalized photothermal sponge. This not only exhibits an unprecedentedly high water evaporation rate 3.53 kg m −2 h −1 along with 98.6% energy conversion efficiency but also uninterruptedly deliver voltage output 0.972 V current density 172.38 µA cm high‐concentration brine over prolonged period under one sun irradiation. Many common electronic devices be driven simply connecting units series or parallel any other auxiliaries. Different from previously proposed mechanism, this study reveals water‐enabled proton concentration fields intermediate region induce additional ion field free containing solute, further enhance output. Given low‐cost materials, simple self‐regeneration design, scalable fabrication processes, stable performance, work offers promising strategy addressing shortages sustainable electricity.

Language: Английский

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Integrated Janus Evaporator with an Enhanced Donnan Effect and Thermal Localization for Salt-Tolerant Solar Desalination and Thermal-to-Electricity Generation

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(42), P. 49892 - 49901

Published: Oct. 10, 2023

Solar-driven interfacial evaporation (SIE) technology has great advantages in seawater desalination. However, during the long-term operation of a solar evaporator, salts can be deposited on absorbing surface, which, turn, hinders process. Therefore, there is an urgent need to propose new antisalt strategies solve this problem. Here, we present novel cogeneration system leveraging salt-tolerant, heterogeneous Janus-structured evaporator (FHJE) for simultaneous desalination and thermoelectric generation. The top layer composed graphene-based photothermal membrane pre-embedded with Fe3+ cations, which enhanced absorption energy conversion abilities. Meanwhile, cations further contribute Donnan effect, effectively repelling salt ions saltwater. bottom comprises hydrogel hydrophilic phytic acid (PA) poly(vinyl alcohol) (PVA), fostering facilitation water transport. FHJE was demonstrated exhibit rate efficiency as high 3.655 kg m-2 h-1 94.7% 10 wt% saltwater, respectively, superior resistance ability without accumulation after 8 h continuous (15 wt%). Furthermore, hydropower device constructed, it possesses open-circuit voltage (VOC) maximum output power density up 143 mV 1.33 W under 1 sun, respectively. This study expected provide ideas comprehensive utilization energy.

Language: Английский

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Solar-driven interfacial evaporation for sustainable desalination: Evaluation of current salt-resistant strategies

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145945 - 145945

Published: Sept. 9, 2023

Language: Английский

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Spongy polyelectolyte hydrogel for efficient Solar-Driven interfacial evaporation with high salt resistance and compression resistance

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 150118 - 150118

Published: March 1, 2024

Language: Английский

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A facile MXene/PPy modified asymmetry sponge solar absorber enabling efficient and high salt resistance evaporation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149304 - 149304

Published: Feb. 4, 2024

Language: Английский

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MnO2/Poly-L-lysine Co-decorated Carbon Fiber Cloth with Decreased Evaporation Enthalpy and Enhanced Photoabsorption/Antibacterial Performance for Solar-Enabled Anti-fouling Seawater Desalination

Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 6, 2024

Language: Английский

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Solar-driven scalable hygroscopic gel for recycling water from passive plant transpiration and soil evaporation

Nature Water, Journal Year: 2024, Volume and Issue: 2(7), P. 663 - 673

Published: July 10, 2024

Language: Английский

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Tree-Inspired Structurally Graded Aerogel with Synergistic Water, Salt, and Thermal Transport for High-Salinity Solar-Powered Evaporation

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: June 17, 2024

Abstract Solar-powered interfacial evaporation is an energy-efficient solution for water scarcity. It requires solar absorbers to facilitate upward transport and limit the heat surface efficient evaporation. Furthermore, downward salt ion also desired prevent accumulation. However, achieving simultaneously fast uptake, transport, localization challenging due highly coupled water, mass, thermal transport. Here, we develop a structurally graded aerogel inspired by tree systems collectively optimize salt, The arched features root-like, fan-shaped microchannels rapid uptake diffusion, horizontally aligned pores near through maximizing absorption minimizing conductive loss. These structural characteristics gave rise consistent rates of 2.09 kg m −2 h −1 under one-sun illumination in 3.5 wt% NaCl 7 days without degradation. Even high-salinity 20 NaCl, maintained stable at 1.94 8 crystal formation. This work offers novel microstructural design address complex interplay

Language: Английский

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Vertically aligned sheet-like structural aerogel incorporated with expanded graphite for efficient solar desalination and atmospheric water harvesting

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153470 - 153470

Published: June 24, 2024

Language: Английский

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Equilibrium and optimization of water-heat transfer in natural cellulose-based hybrid hydrogel for efficient solar desalination

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150398 - 150398

Published: March 13, 2024

Language: Английский

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