Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 221, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2020.110910
Keywords
Solar evaporation; Janus structure; Salt-resistance; Soot; Desalination
Funding
- National Natural Science Foundation of China [21673167]
- Wuhan Textile University [195027, 205016]
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The study developed a unique Janus solar evaporator with a hydrophobic soot-coated cloth/hydrophilic cloth bilayer on hydrophobic polyethylene-wrapped cellulose aerogel, which demonstrates strong salt-resisting ability and efficient steam generation.
A Janus solar evaporator with 2D water path has been built by covering the hydrophobic soot-coated cloth/hydrophilic cloth bilayer on hydrophobic polyethylene (PE)-wrapped cellulose aerogel. Such a unique structure not only minimizes the heat conduction loss compared to the typical flat Janus structure in the direct contact mode, but also has a much better salt-resisting ability than common hydrophilic solar evaporator with 2D water channel. By using candle soot (CS) as light harvester, the obtained solar evaporator (SE-CS) was demonstrated to strongly resist salt deposition and efficiently generate steam from 3.5 to 20 wt% NaCl solution under 1.0 sun illumination. Furthermore, SE-CS could be used to produce steam from methyl orange (MO) solution (0.01 M) and heavy metal solution (Ni2+, Cu2+, Zn2+, and Pb2+ with concentration of 1000 mg L-1). In addition to CS, kerosene soot (KS) could also promote the efficient steam generation from 3.5 wt% NaCl solution over the obtained solar evaporator (SE-KS) under 1.0 sun irradiation. This work paves the way for practical application of solar-driven evaporation in seawater desalination and wastewater purification.
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