Micronleaf-shape graphene interfaces on wood transverse sections as advanced photothermal evaporators for water purification  

作　　者：Zhaoyang Yu Jinbo Hu Gonggang Liu Yuan Liu Shanshan Chang Denis Rodrigue Xiaodong(Alice)Wang 

机构地区：[1]College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China [2]Hunan Taohuajiang Bamboo Science&Technology Co.Ltd.,Yiyang 413400,China [3]Astrum Innovations Limited,Wisdom Park,Country Garden,Changsha 410006,China [4]Department of Chemical Engineering,Laval University,Quebec G1V 0A6,Canada [5]Department of Wood and Forest Sciences,Laval University,Quebec G1V 0A6,Canada

出　　处：《Journal of Materials Science & Technology》2024年第26期81-89,共9页材料科学技术(英文版)

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).

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.

关 键 词：GRAPHENE Wood cross section CAPILLARITY Solar radiation TRANSPIRATION 

分 类 号：TS6[轻工技术与工程]