Vapor condensation plays a crucial role in solar water-purification technologies. Conventional condensers in solar water-purification systems do not provide sufficient cooling power for vapor condensation, limiting the water production rate to 0.4 L m-2 hour-1. On the other hand, radiative dew condensation, a technique used by existing radiative dew condensers, only works at nighttime and is incompatible with solar water-purification technologies. Here, we develop daytime radiative condensers that reflect almost all solar radiation, and can thus create dew water even in direct sunlight. Compared to stateof- art condensers, our daytime radiative condenser doubles the production of purified water over a 24-hour period.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: M. K. acknowledges support from the National Science Foundation (ECCS-1750341). Z. Y. and M. Z. acknowledges support from the National Science Foundation (CMMI-156197). M. Z. acknowledges support from the 3M fellowship.