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Hollow Black TiAlOx Nanocomposites for Solar Thermal Desalination

Abstract

Although solar-thermal conversion technique shows great potential for seawater desalination, there remains a grand challenge in exploring low-cost and high-efficiency photothermal materials. We here report a molten salt assisted galvanic replacement method for preparing a hollow black TiAlOx composite, which features a high solar absorptivity with almost covering 90.2% and holds a high efficiency of 71.1 % in a high salinity solution containing 15.3 wt.% NaCl (~5 times more concentrated than seawater). We exemplify the practical application of such hollow black TiAlOx composites as photothermal composites by setting up the automatic and manual tracking solar desalination devices with a photic area of ~1.0 m2, which can produce purified water with a rate of above 4.0 L m-2 day-1 in high-salinity water under natural light irradiation, and maintains good stability upon 5-days continuous running. The advantages in the as-developed hollow black TiAlOx composites, including scalability, low cost, and high photothermal conversion efficiency, may open up a promising avenue for implementing practical application in seawater desalination.

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Publication details

The article was received on 17 Dec 2018, accepted on 11 Apr 2019 and first published on 12 Apr 2019


Article type: Paper
DOI: 10.1039/C8NR10117E
Citation: Nanoscale, 2019, Accepted Manuscript

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    Hollow Black TiAlOx Nanocomposites for Solar Thermal Desalination

    L. Yi, D. Qi, P. Shao, C. Lei, Y. Hou, P. Cai, G. Wang, X. Chen and Z. Wen, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR10117E

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