首页|Solar evaporation for simultaneous oil-water separation and electricity generation with Janus wood-based absorbers

Solar evaporation for simultaneous oil-water separation and electricity generation with Janus wood-based absorbers

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Oily wastewater from ocean oil spills endangers marine ecosystems and human health.Therefore,developing an effective and sustainable solution for separating oil-water mixtures is urgent.Interfacial solar photothermal evaporation is a promising approach for the complete separation of two-phase mixtures using only solar energy.Herein,we report a carbonized wood-based absorber with Janus structure of comprising a hydrophobic top-layer and an oleophobic bottom-layer for simultaneous solar-driven oil-water separation and electricity generation.Under sunlight irradiation,the rapid evaporation of seawater will induce a separation of oil-water mixtures,and cause a high salt concentration region underlying the interface,while the bottom"bulk water"maintains in a low salt concentration,thus forming a salinity gradient.Electricity can be generated by salinity gradient power.Therefore,oil-water separation efficiency of＞99％and derived extra electricity power of～0.1 W/m2 is achieved under solar radiation,demonstrating the feasibility of oil-water separation and electricity production synchronously directly using solar energy.This work provides a green and cost-effective path for the separation of oil-water mixtures.

Oily wastewaterCarbonized woodSalinity gradientElectricity generationSolar irradiation

Yue Yang、Ze Fu、Qi Zhang

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Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse,School of Environmental and Biological Engineering,Nanjing University of Science & Technology,Nanjing 210094,China

Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education),School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China

National Laboratory of Solid State Microstructures,Collaborative Innovation Center of Advanced Microstructures,College of Engineering and Applied Sciences,Key Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education),Jiangsu Key Laboratory of Artificial Functional Materials,Nanjing University,Nanjing 210093,China

国家自然科学基金Fellowship of China Postdoctoral Science Foundation

221060162022M721556

2024

10.1007/s11783-024-1775-8

环境科学与工程前沿
高等教育出版社

环境科学与工程前沿

影响因子：0.545
ISSN：2095-2201
年,卷(期)：2024.18(2)
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