期刊
ACS APPLIED NANO MATERIALS
卷 3, 期 11, 页码 10895-10904出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c02123
关键词
TiO2 nanochannel membrane; plasmonic absorber; photocatalysis; solar distillation; desalination; decontamination
资金
- National Natural Science Foundation of China [21775016, 21874013]
- Research Funds for the Central Universities [N170502003, N170908001, N182410008-1, N2005027]
- Talent Project of Revitalizing Liaoning [XLYC1807165]
Steam generation via harvesting solar energy is one of the promising approaches for seawater desalination. Nowadays, organic contamination in seawater represents a great challenge that needs to be solved. Specially, low-molecular-weight organic molecules may easily pass through distillation membranes with water steam and enter freshwater sources. In this study, we develop a solar distillation membrane (DM) for contaminated seawater desalination rather than grading treatment of contaminated seawater by integrating a large-scale TiO2 nanochannel membrane with plasmonic silver nanoparticles (Ag NPs) via inhomogeneous assembling. Such incorporation enables a self-upstanding DM acting as an efficient broad-band plasmonic absorber (200-2500 nm) and possessing high solar steam efficiencies (82% at 6 kW m(-2)), thus driving the photothermal desalination and photocatalytic decontamination in a synchronous fashion. The resulting membranes exhibit a rapid evaporation rate (7.14 kg m(-2) h(-)(1)), helping in achieving fresh water from seawater contaminated with a high concentration of organics with remarkable durability and reusability. We believe the DM proposed in this study could pave the way for a promising point-of-use device to obtain fresh water from contaminated saline water.
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