期刊
SOLAR ENERGY
卷 209, 期 -, 页码 325-333出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2020.09.013
关键词
Solar-driven water evaporation; Reduced graphene oxide; Polyacrylonitrile; Electrospinning; Seawater desalination
资金
- National Natural Science Foundation of China [51708085, 21476034]
- Program for Liaoning Innovative Talents in University
- Key Research & Development Project of Liaoning Province [2017308005]
- Fundamental Research Funds for the Central Universities [3132020141]
- Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering, MOE [KLIEEE-18-01]
Solar-driven water evaporation is a method to make seawater sustainable by producing lower levels of greenhouse gases at present. Herein, we prepared an efficient, flexible and lightweight reduced graphene oxide (rGO)/polyacrylonitrile (PAN) composite membrane by a simple electrospinning technology for photothermal desalination. After blending with rGO, the electrospun membrane exhibited a strong light absorption property in a wide spectral pectrum and can absorb more than 80% of the light. More importantly, the prepared rGO/PAN membrane presented advantages of good heat localization and high evaporation efficiency. When placed on a thermal barrier made by polystyrene foam, it converts 89.4% of the light into heat, allowing 1.46 kg m(-2) of seawater to evaporate in an hour under one sun. Meanwhile, the rGO/PAN membrane was used as a steam generator to obtain the pure water with low ion concentration (Na+: 0.61 mg L-1, Mg2+: 0.67 mg L-1, K+: 1.71 mg L-1, and Ca2+: 0.48 mg L-1) from high salinity simulating seawater. Based on the results, the rGO/PAN membrane provides a new avenue for large-scale photothermal application in the field of seawater desalination.
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