Inspired by lotus leaves, self-floating Janus cotton fabric is successfully fabricated for solar steam generation with salt-rejecting property. The layer-selective soot-deposited fabrics not only act as a solar absorber but also provide the required superhydrophobicity for floating on the water. With a polyester protector, the prepared Janus evaporator exhibits a sustainable evaporation rate of 1.375 kW m h and an efficiency of 86.3% under 1 sun (1 kW m) and also performs well under low intensity and inclined radiation. Furthermore, no special apparatus and/or tedious processes are needed for preparing this device. With a cost of less than $1 per m, this flexible Janus absorber is a promising tool for portable solar vapor generator.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6686278 | PMC |
| http://dx.doi.org/10.1002/gch2.201800117 | DOI Listing |
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