Citation: Yun-Song XU, Zhong-Ping YAO, Tian-Qi ZHAO, Yan-Ran GU, Xiao ZHANG, Ping SONG. MXene/Dendritic Co/Polyvinylidene Fluoride Composite Photothermal Membrane: Preparation and Interfacial Evaporation Properties[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(12): 2423-2432. doi: 10.11862/CJIC.2022.243 shu

MXene/Dendritic Co/Polyvinylidene Fluoride Composite Photothermal Membrane: Preparation and Interfacial Evaporation Properties

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China

Corresponding author: Zhong-Ping YAO, yaozhongping@hit.edu.cn
Received Date: 29 May 2022
Revised Date: 7 October 2022

Figures(6)

In this work, Ti₃ AlC₂ was etched and exfoliated into few-layer of Ti₃C₂T_x MXene nanosheets using wet etching. Then, dendritic Co was prepared by electrochemical reduction, and afterwards Ti₃C₂T_x/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 Ti₃C₂T_x/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.
- MXene/dendritic Co,
- composite membrane,
- photothermal conversion,
- interfacial evaporation rate
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