Highly efficient three-dimensional solar evaporator for high salinity desalination by localized crystallization.

ABSTRACT: Solar-driven water evaporation represents an environmentally benign method of water purification/desalination. However, the efficiency is limited by increased salt concentration and accumulation. Here, we propose an energy reutilizing strategy based on a bio-mimetic 3D structure. The spontaneously formed water film, with thickness inhomogeneity and temperature gradient, fully utilizes the input energy through Marangoni effect and results in localized salt crystallization. Solar-driven water evaporation rate of 2.63 kg m^-2 h^-1, with energy efficiency of >96% under one sun illumination and under high salinity (25 wt% NaCl), and water collecting rate of 1.72 kg m^-2 h^-1 are achieved in purifying natural seawater in a closed system. The crystalized sa

SUBMITTER: Wu L 

PROVIDER: S-EPMC6985111 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature