Multiscale Biomimetic Evaporators Based on Liquid Metal/Polyacrylonitrile Composite Fibers for Highly Efficient Solar Steam Generation  

作　　者：Yuxuan Sun Dan Liu Fei Zhang Xiaobo Gao Jie Xue Qingbin Zheng 

机构地区：[1]School of Science and Engineering,The Chinese University of Hong Kong,Shenzhen 518172,Guangdong,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期93-111,共19页纳微快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(52372096,52102368,22205189,52203103);the Program for Guangdong Introducing Innovative and Entrepreneurial Teams(2017ZT07C291);the Shenzhen Science and Technology Program(JCYJ20230807114205011 and KQTD20170810141424366);the Guang Dong Basic and Applied Basic Research Foundation(2024A1515011953,2022A1515011010 and 2021A1515110350);the Regional Joint Fund for Basic Research and Applied Basic Research of Guangdong Province(No.2020SA001515110905);the Shenzhen Natural Science Foundation(GXWD20201231105722002-20200824163747001);the 2023 SZSTI stable support scheme.

摘　　要：Solar steam generation(SSG)offers a cost-effective solution for producing clean water by utilizing solar energy.However,integrating effective thermal management and water transportation to develop high-efficiency solar evaporators remains a significant challenge.Here,inspired by the hierarchical structure of the stem of bird of paradise,a three-dimensional multiscale liquid metal/polyacrylonitrile(LM/PAN)evaporator is fabricated by assembling LM/PAN fibers.The strong localized surface plasmon resonance of LM particles and porous structure of LM/PAN fibers with interconnected channels lead to efficient light absorption up to 90.9%.Consequently,the multiscale biomimetic LM/PAN evaporator achieves an outstanding water evaporation rate of 2.66 kg m^(-2)h^(-1)with a solar energy efficiency of 96.5%under one sun irradiation and an exceptional water rate of 2.58 kg m^(-2)h^(-1)in brine.Additionally,the LM/PAN evaporator demonstrates a superior purification performance for seawater,with the concentration of Na^(+),Mg^(2+),K^(+)and Ca^(2+)in real seawater dramatically decreased by three orders to less than 7 mg L^(-1) after desalination under light irradiation.The multiscale LM/PAN evaporator with hierarchical structure regulates the water transportation as well as thermal management for highly effective solar-driven evaporation,providing valuable insight into the structural design principles for advanced SSG systems.

关 键 词：Liquid metal POLYACRYLONITRILE Composite fibers Solar steam generation Seawater desalination 

分 类 号：TG1[金属学及工艺—金属学]