Yang, YaweiZhao, HongyangYin, ZongyouZhao, JianqiuYin, XingtianLi, NaYin, DandanLi, YannanLei, BoDu, YapingQue, Wenxiu2019-06-212051-6355http://hdl.handle.net/1885/164153A novel and elegant hydrophilic/hydrophobic nanoporous double layer structure was designed and developed for efficient long-term water desalination. It contained a hydrophobic salt-resistant hierarchical layer of well-defined Cu2SnSe3 (or Cu2ZnSnSe4) nanosphere arrays for broad solar harvesting and water vapor evaporation, and a hydrophilic filter membrane for continuous water supply and vapor generation. The as-fabricated self-floatable devices achieve remarkable solar water evaporation performances (average evaporation rate: 1.657 kg m−2 h−1 and solar thermal conversion efficiency: 86.6% under one sun) with super stability for water distillation from seawater and wastewater containing organic dyes, heavy metals and bacteria.This work was supported by the National Natural Science Foundation of China (Grant No. 61774122), the Science and Technology Developing Project of Shaanxi Province under Grant No. 2015KW-001, and the 111 Project from China (B18013, B14040). Y. P. Du gratefully acknowledge the NSFC (Grant No. 21371140), the National Key R&D Program of China (2017YFA0208000), 111 Project (B18030) from China, and the China National Funds for Excellent Young Scientists (Grant No. 21522106).application/pdfen-AU© The Royal Society of Chemistry 2018201810.1039/c8mh00386f2019-03-24