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A High-Performance Self-Regenerating Solar Evaporator for Continuous Water Desalination.
Kuang, Yudi; Chen, Chaoji; He, Shuaiming; Hitz, Emily M; Wang, Yilin; Gan, Wentao; Mi, Ruiyu; Hu, Liangbing.
Afiliación
  • Kuang Y; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Chen C; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • He S; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Hitz EM; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Wang Y; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Gan W; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Mi R; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
  • Hu L; Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
Adv Mater ; 31(23): e1900498, 2019 Jun.
Article en En | MEDLINE | ID: mdl-30989752
Emerging solar desalination by interfacial evaporation shows great potential in response to global water scarcity because of its high solar-to-vapor efficiency, low environmental impact, and off-grid capability. However, solute accumulation at the heating interface has severely impacted the performance and long-term stability of current solar evaporation systems. Here, a self-regenerating solar evaporator featuring excellent antifouling properties using a rationally designed artificial channel-array in a natural wood substrate is reported. Upon solar evaporation, salt concentration gradients are formed between the millimeter-sized drilled channels (with a low salt concentration) and the microsized natural wood channels (with a high salt concentration) due to their different hydraulic conductivities. The concentration gradients allow spontaneous interchannel salt exchange through the 1-2 µm pits, leading to the dilution of salt in the microsized wood channels. The drilled channels with high hydraulic conductivities thus function as salt-rejection pathways, which can rapidly exchange the salt with the bulk solution, enabling the real-time self-regeneration of the evaporator. Compared to other salt-rejection designs, the solar evaporator exhibits the highest efficiency (≈75%) in a highly concentrated salt solution (20 wt% NaCl) under 1 sun irradiation, as well as long-term stability (over 100 h of continuous operation).
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Banco de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos