A green and efficient strategy facilitates continuous solar-induced steam generation based on tea-assisted synthesis of gold nanoflowers  

作　　者：Guoshuai Zhu Gaoxing Jing Guorong Xu Qiang Li Ruijia Huang Feng Li Haoxuan Li Dong Wang Wenwen Chen Ben Zhong Tang 

机构地区：[1]Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging,School of Biomedical Engineering,Shenzhen University Health Science Center,Shenzhen 518055,China [2]Key Laboratory of Eco-Textiles(Ministry of Education),Nonwoven Technology Laboratory,Jiangnan University,Wuxi 214122,China [3]The Institute of Seawater Desalination and Multipurpose Utilization,Ministry of Natural Resources(MNR),Tianjin 300192,China [4]Centre for AIE Research,College of Material Science and Engineering,Shenzhen University,Shenzhen 518055,China [5]School of Science and Engineering,Shenzhen Key Laboratory of Functional Aggregate Materials,The Chinese University of Hong Kong,Shenzhen 518172,China

出　　处：《Nano Research》2022年第7期6705-6712,共8页纳米研究（英文版）

基　　金：supported by the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province(No.2020B1515020011);the National Natural Science Foundation of China(Nos.22074094,21801169,and 22005195);China Postdoctoral Science Foundation(No.2020M672797).

摘　　要：Developing a highly efficient system for solar steam generation(SSG)using a straightforward and eco-friendly method to harvest freshwater is fascinating but challenging.Here,we stir the mixture of brewed tea and HAuCl4 to prepare Au nanoflowers,possessing broad wavelength light absorption and excellent photothermal effects.After freeze-drying the mixture of Au nanoflowers,cellulose nanocrystals(CNCs),and aqueous polyurethane(PU)emulsion,we obtain three-dimensional(3D)porous structures(CNC-PU-Au)for SSG.The whole process does not involve any sophisticated procedure or produce detrimental byproducts.The evaporation rates are 2.24 kg·m^(−2)·h^(−1) for pure water and 2.18 kg·m^(−2)·h^(−1) for seawater using CNC-PU-Au under one sun.The solar energy conversion efficiency is up to 90.92%under one sun illumination.Besides,CNC-PU-Au shows self-driven salt resistance and durability.In outdoors application for seawater desalination,the maximum evaporation rate can maintain at 2.19 kg·m^(−2)·h^(−1) in spring and 3.42 kg·m^(−2)·h^(−1) in summer.These unique features promise the utility of CNC-PU-Au in the ecofriendly water treatment industry.

关 键 词：Au nanoflowers solar steam generation ECO-FRIENDLY SELF-CLEANING seawater desalination 

分 类 号：TQ028.8[化学工程]