Poly(ionic liquid)-crosslinked graphene oxide/carbon nanotube membranes as efficient solar steam generators

作     者：Jiangjin Han Zhiyue Dong Liang Hao Jiang Gong Qiang Zhao Jiangjin Han;Zhiyue Dong;Liang Hao;Jiang Gong;Qiang Zhao

作者机构：Key Laboratory of Material Chemistry for Energy Conversion and StorageMinistry of EducationHubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China Hubei Collaborative Innovation Center for Advanced Chemical MaterialsMinistry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical EngineeringHubei UniversityWuhan430062China 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2023年第8卷第1期

页      面：151-162页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the financial support of the National Key R&D Program of China(No.2019YFC1806000) the Huazhong University of Science and Technology(No.3004013118) support from the National Natural Science Foundation of China(No.51903099) Huazhong University of Science and Technology(No.3004013134) the 100 Talents Program of the Hubei Provincial Government.Z.D.thanks the Postdoctoral Science Foundation of China(No.0106013063). 

主　　题：Solar energy Graphene oxide Poly(ionic liquid)s Solar steam generation Wastewater treatment 

摘      要：Graphene oxide(GO)is regarded as a promising candidate to construct solar absorbers for addressing freshwater crisis,but the easy delamination of GO in water poses a critical challenge for practical solar desalination.Herein,we improve the stability of GO membranes by a self-crosslinking poly(ionic liquid)(PIL)in a mild condition,which crosslinks neighbouring GO nanosheets without blemishing the hydrophilic structure of GO.By further adding carbon nanotubes(CNTs),the sandwiched GO/CNT@PIL(GCP)membrane displays a good stability in pH=1 or 13 solution even for 270 days.The molecular dynamics simulation results indicate that the generation of water nanofluidics in nanochannels of GO nanosheets remarkably reduces the water evaporation enthalpy in GCP membrane,compared to bulk water.Consequently,the GCP membrane exhibits a high evaporation rate(1.87 kg m^(-2)h^(-1))and displays stable evaporation rates for 14 h under 1 kW m^(-2)irradiation.The GCP membrane additionally works very well when using different water sources(e.g.,dye-polluted water)or even strong acidic solution(pH=1)or basic solution(pH=13).More importantly,through bundling pluralities of GCP membrane,an efficient solar desalination device is developed to produce drinkable water from seawater.The average daily drinkable water amount in sunny day is 10.1 kg m^(-2),which meets with the daily drinkable water needs of five adults.The high evaporation rate,long-time durability and good scalability make the GCP membrane an outstanding candidate for practical solar seawater desalination.