摘要
Similar to transpiration,the formulation of interfacial solar evaporation has been designed to perform water treatment.The concept involves wood-based support(tree)with a graphene-based layer acting as leaves.To enhance light absorption and solar-thermal conversion capacity,a novel holly-leaf graphene(HLG)layer with an individual hollowed-out structure was engineered.The formation mechanism of this HLG was shown to be linked to the strong capillarity forces in the polyporous wood.By creating biomimetic leaves made of graphene,the light-to-heat conversion performance can be improved,while exhibiting substantially lower thermal conductivity(0.074 W/(m K))than natural wood.Under solar irradiation,HLG/wood exhibits an outstanding evaporation rate of 1.96 kg/(m^(2)h),with an impressive ef-ficiency of 94.2%.A theoretical model of HLG/wood based on the thermal management capability was built to further confirm its structural superiority in facilitating photothermal conversion.Consequently,a bilayer evaporator based on HLG/wood has the potential to revolutionize water purification processes,including desalination of seawater,removal of heavy metal ions,and treatment of organic dye-contaminated wastewater.
基金
supported by the National Natural Science Foun-dation of China(Nos.32171709 and 32271791)
the Forestry Science and Technology Innovation of Hunan Province(No.XLK202107-3)
the Scientific Research Project of Hunan Education Department(No.21B0242).
