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High-absorption recyclable photothermal membranes used in a bionic system for high-efficiency solar desalination via enhanced localized heating

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Abstract

Desalination utilizing solar energy is an effective way to mitigate the crisis of water shortage, but its large-scale application in production has been largely limited by the low evaporation efficiency. Here, we report a plate thermal reduction (PTR) method for rapid preparation of plasmonic-active filter paper (PP) as the photothermal material with broadband solar absorption over 92%. By imitating the spontaneous water circulation mechanism of plants, we designed a high-efficiency bionic solar evaporation and desalination system. Air with excellent low thermal conductivity was used as the thermal insulation material. Because of the enhanced localized heating effect, the system features a high solar evaporation efficiency of up to 89% under 10 kW m−2. Furthermore, under natural sunlight, the bionic system has a drinkable freshwater production rate of 0.97 kg m−2 h−1 under about 0.9 kW m−2 with the highest evaporation efficiency of 79% for one day. With simple material preparation and efficient and stable performance, the bionic system is ideal for large-scale production to tackle energy, water resource and environmental issues.

Graphical abstract: High-absorption recyclable photothermal membranes used in a bionic system for high-efficiency solar desalination via enhanced localized heating

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Publication details

The article was received on 21 Jul 2017, accepted on 29 Aug 2017 and first published on 29 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA06384A
Citation: J. Mater. Chem. A, 2017, Advance Article
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    High-absorption recyclable photothermal membranes used in a bionic system for high-efficiency solar desalination via enhanced localized heating

    Z. Liu, Z. Yang, X. Huang, C. Xuan, J. Xie, H. Fu, Q. Wu, J. Zhang, X. Zhou and Y. Liu, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA06384A

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