期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 9, 页码 9766-9774出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c01841
关键词
solar-driven interfacial evaporation; laser-induced graphene membrane; salt-resistance; long-term stability; desalination
资金
- National Key R&D Program of China [2018YFA0209500]
- National Natural Science Foundation of China [51706100]
- Natural Science Foundation of Jiangsu Province [BK20180477]
- Fundamental Research Funds for the Central Universities [30918011205]
By developing a porous graphene membrane combined with thermal insulation materials and water pumping channels, high-efficiency and stable interfacial evaporation has been achieved, effectively addressing the freshwater shortage crisis.
Recently, solar-driven interfacial evaporation has demonstrated its huge potential in mitigating the freshwater shortage crisis. However, the pollution and salt formation on evaporation surfaces seriously hinder its practical application. Herein, we developed a porous graphene membrane originating from a polyimide membrane with a melamine sponge framework (PI@MS) through laser processing for stable and efficient interfacial evaporation. With the assistance of alternating wrapping of expanded polystyrene foam (thermal insulator) and air-laid paper (water pumping channels), which ensure plentiful water supply as well as heat localization, the porous graphene membrane achieved a high evaporation rate (similar to 1.31 kg m(-2) h(-1)) and photothermal conversion efficiency (similar to 85.4%) under 1 sun light intensity. Moreover, the salt rejection experiment demonstrated that the evaporator developed in our work possessed remarkable stability and salt-rejecting ability as it could maintain its evaporation performance for a long time (>12 h) in a highly concentrated NaCl solution (10 wt %) without any salt crystals forming on the surface nor inside the pores of the membrane.
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