Synergistic Energy Nanoconfinement and Water Activation in Hydrogels for Efficient Solar Water Desalination

Precisely controlled distribution of energy in solar-to-thermal energy conversion systems could allow for enhanced energy utilization. Light-absorbing hydrogels provide a means for evaporating water by using solar energy, yet targeted delivery of solar thermal energy to power the water evaporation process remains challenging. Here, we report a light-absorbing sponge-like hydrogel (LASH) that is created by in situ gelation of a light-absorbing nanoparticle-modified polymer, leading to synergistic energy nanoconfinement and water activation. By experimental demonstration and theoretical simulation, the LASH presents record high vapor generation rates up to ∼3.6 kg m–2 h–1 and stable long-term performance under 1…

• AP
  Alfred P. Sloan Foundation
• CA
  Camille and Henry Dreyfus Foundation
• LM
  Lockheed Martin