Journal
ADVANCED SUSTAINABLE SYSTEMS
Volume 5, Issue 9, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsu.202100122
Keywords
carbon materials; solar steam generation; water evaporating enthalpy; willow catkins
Funding
- Xinzhou Teachers University [2020KY04]
- Dr. Start-up Fund of XinZhou Teachers University
- Shanxi 1331 Project Key Subjects Construction
- General youth fund of Shanxi applied basic research program [201901D211458]
- Top Science and Technology Innovation Teams of Xinzhou Teachers University
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The solar steam evaporator fabricated by carbonized and activated willow catkins films demonstrates good steam generation ability and heat localization performance, providing a sustainable way for efficiently harvesting solar energy to produce fresh water.
Utilization of carbon materials for harvesting solar energy is a green, feasible, sustainable, and promising way to manufacture freshwater from sewage and seawater. However, sunlight absorption efficiency, light to thermal conversion efficiency, and expensive cost are still limitations for large-scale solar steam generation. Here, a solar steam evaporator which is fabricated by carbonized willow catkins films and activated by different metal chlorides under nitrogen at 800 degrees C is demonstrated. Under the light irradiation intensity of one sun (1000 W m(-2)), water evaporation rate of the prepared evaporator is up to approximate to 2.17 kg m(-2) h(-1), and the surface temperatures reach up to 50 and 91.7 degrees C under water-saturated and dry situations, respectively, indicating good steam generation ability and heat localization performance of the fabricated evaporator. The SEM, BET, DSC, and ICP-MS results show that such a high water evaporation rate of the prepared carbon materials is due to the typical tubular micro-structure, which decreases water enthalpy of evaporation and the water evaporation in the form of molecular clusters. This method of carbonized and activated willow catkins films provides a sustainable way for efficiently harvesting solar energy to produce fresh water from seawater and sewage.
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