Experimental Design of Photothermal Water Evaporation Based on PTFE/Graphene/Sand Core
To enhance the photothermal conversion efficiency of seawater evaporation,a mushroom-shaped isolated water evaporation device was designed.The"cap"of the mushroom is composed of polytetrafluoroethylene(PTFE)/graphene/sand core,while the"stem"is a fine sponge column.Using this water evaporation device,photothermal interfacial seawater evaporation experiments were conducted to test the evaporation performance.The results of the seawater interfacial evaporation experiments show that under the illumination of 2 suns intensity,the evaporation rate per unit area of seawater reaches 1.57 kg/(m2·h),and maintains relatively good stability.The hydrophobicity of PTFE prevents salt crystals from precipitating on the surface of the heating layer,ensuring the photothermal conversion efficiency of graphene.This experiment can cultivate students'ability to apply theoretical knowledge to experimental research.
interfacial solar evaporationseparation-typeSiO2 sand coreself-cleaning surface
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NSTL
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