Fabric-based all-weather-available photo-electro-thermal steam generator with high evaporation rate and salt resistance  

高蒸发速率的耐盐织物基全天候可用光热-电热蒸发器

作　　者：Shuangjie Sun Qingli Tian Hao-Yang Mi Jun Li Xin Jing Zhanhu Guo Chuntai Liu Changyu Shen 孙双杰;田庆利;米皓阳;李鋆;经鑫;郭占虎;刘春太;申长雨(National Engineering Research Center for Advanced Polymer Processing Technology,The Key Laboratory of Advanced Materials Processing&Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China;Integrated Composites Laboratory(ICL),Department of Chemical&Biomolecular Engineering,University of Tennessee,Knoxville 37996,USA;Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China)

机构地区：[1]National Engineering Research Center for Advanced Polymer Processing Technology,The Key Laboratory of Advanced Materials Processing&Mold of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China [2]Integrated Composites Laboratory(ICL),Department of Chemical&Biomolecular Engineering,University of Tennessee,Knoxville 37996,USA [3]Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,China

出　　处：《Science China Materials》2022年第9期2479-2490,共12页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52173049 and 12072325);the Natural Science Foundation of Hunan Province(2021JJ40177)。

摘　　要：Solar-driven steam generation is a practical strategy to harness solar energy for desalination and production of clean water with a minimized carbon footprint.However,this strategy suffers from a low evaporation rate under weak illumination on cloudy days or at night.Herein,we present a fabric-based all-weather-available photo-electrothermal steam generator(P/ET-SG)capable of regulating the surface temperature and evaporation rate by the coupling effect of photo-thermal and electro-thermal heating depending on the light conditions.An unprecedented high surface temperature of 52℃ in the wet state and an evaporation rate of 2.61 kg m^(-2) h^(-1) were achieved by the P/ET-SG under 1 sun with only 1 V input voltage owing to the uniform heat distribution and the coupled electro-thermal source.The oneway fluidic design of the P/ET-SG effectively prevented salt precipitation during continuous desalination in 24 h and was able to remove salt granules from the evaporation surface.Furthermore,the P/ET-SG demonstrated a high evaporation rate of 2.58 kg m^(-2) h^(-1) in the purification of concentrated saline water and dye-contaminated water with high efficiency(>99.9%).This study offers new thoughts for the design of allweather-available solar steam generators with high efficiency and makes a step forward towards fast purification of concentrated saline water and wastewater.太阳能驱动水蒸发是利用太阳能进行海水脱盐和清洁水生产的实用方法,具有最低的碳排放.但该方法在弱光照的阴天或夜间蒸发速率较低.本文基于光热和电热加热的耦合效应,提出了一种可以根据光照条件调节表面温度和蒸发速率的织物基全天候可用光热-电热蒸发器(P/ET-SG).由于电热层与光热层均匀的热分布,该P/ET-SG在1 V电压和1个太阳光辐照下其表面温度及蒸发速率可达52℃和2.61 kg m^(-2) h^(-1).P/ET-SG所采用的单向流体结构设计使其在连续24小时的海水脱盐过程中具备极高的耐盐性,且能除去蒸发表面的盐颗粒.此外,在高浓度盐水和污水净化中,P/ET-SG展现了高的蒸发速率(2.58 kg m^(-2) h^(-1))和净化效率(>99.9%).本文为全天候可用的高效太阳能蒸发器的设计提供了新思路,并提供了高浓度盐水和污水高效净化的新策略.

关 键 词：solar steam generation photo-electro-thermal effect salt resistance DESALINATION FABRIC 

分 类 号：P747[天文地球—海洋科学] TK519[动力工程及工程热物理—热能工程]