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MXene/Dendritic Co/Polyvinylidene Fluoride Composite Photothermal Membrane: Preparation and Interfacial Evaporation Properties
Author NameAffiliationE-mail
XU Yun-Song School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China  
YAO Zhong-Ping School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China yaozhongping@hit.edu.cn 
ZHAO Tian-Qi School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China  
GU Yan-Ran School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China  
ZHANG Xiao School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China  
SONG Ping School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China  
Abstract: In this work, Ti3AlC2 was etched and exfoliated into few-layer of Ti3C2Tx MXene nanosheets using wet etching. Then, dendritic Co was prepared by electrochemical reduction, and afterwards Ti3C2Tx/dendritic Co/PVDF composite photothermal membrane was prepared by vacuum filtration utilizing hydrophilic polyvinylidene fluoride (PVDF) membrane as substrate. The structure and morphology of the composites were characterized, as well as the optical absorption and interfacial evaporation properties of the composite photothermal membrane were studied. The results displayed that under the simulated one solar light (the light intensity was 1 kW·m-2), the light absorptivity of Ti3C2Tx/dendritic Co/PVDF composite photothermal membrane was 95.3%, the evaporation rate of pure water reached 1.78 kg·m-2·h-1, and the efficiency of interface evaporation was as high as 97.5%. In addition, the performance of interfacial evaporation in simulated seawater was accordingly tested. The water obtained by evaporation and condensation meets the drinking water standards of World Health Organization (WHO) and U.S. Environmental Protection Agency (EPA), and the evaporation rate reached 1.61 kg·m-2·h-1, which was stable at 1.59 kg·m-2·h-1 after five cycles.
Keywords: MXene/dendritic Co  composite membrane  photothermal conversion  interfacial evaporation rate
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XU Yun-Song,YAO Zhong-Ping,ZHAO Tian-Qi,GU Yan-Ran,ZHANG Xiao,SONG Ping.MXene/Dendritic Co/Polyvinylidene Fluoride Composite Photothermal Membrane: Preparation and Interfacial Evaporation Properties[J].Chinese Journal of Inorganic Chemistry,2022,38(12):2423-2432.
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Chinese Journal of Inorganic Chemistry