3. Conclusion
In summary, hydrophile/hydrophobe amphipathic Janus nanofibers aerogel is fabricated by the combination of parallel electrospinning technology and freeze drying. Photothermal materials are covered on the six surfaces of the cubic aerogel to obtain a 3D self-floating solar steam generator. The light absorption rate of the product is above 95 % in the full spectrum range. Under light irradiation, the surface temperature of the product rapidly rises to meet the requirement of fast water evaporation within 2 min. The water evaporation rate can reach up to 2.944 kg·m-2·h-1 with the energy efficiency of 91.05 % under 1 sun irradiation, and after the product is flipped, the water evaporation rate can be quickly recovered. Owing to the salt-resisting property, the formation of salt deposition can be effectively slowed down, so that the performance attenuation in the evaporation of saline water is suppressed. The product possesses excellent ability of solar desalination and removing organic pollutants to acquire drinkable water.