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Layered tin monoselenide as advanced photothermal conversion materials for efficient solar energy driven water evaporation

Abstract

Solar energy driven water evaporation lays solid foundation for important photothermal applications such as sterilization, seawater desalination and electricity generation. Benefit from strong light-matter coupling, broad absorption wavelength range and prominent quantum confinement effect, layered tin monoselenide (SnSe) holds great potential to effectively harness solar irradiation and convert it to heat energy. In this work, SnSe is successfully deposited on centimeter-scale nickel foam using a facile one-step pulsed-laser deposition approach. Importantly, the maximum evaporation rate of SnSe coated nickel foam (SnSe@NF) reaches 0.85 kg m-2 h-1, which is even 21% larger than commercial super blue coating (0.7 kg m-2 h-1) in the same condition. Systematic analysis reveals that its good photothermal conversion capability is attributed to synergetic effect of multi-scattering induced light trapping as well as the optimal tradeoff between light absorption and phonon emission. Finally, the SnSe@NF device is further used for seawater evaporation, demonstrating a comparable evaporation rate (0.8 kg m-2 h-1) to fresh water and good stability over cycles of usage. In summary, the current contribution depicts a facile one-step scenario for economical and efficient solar-enabled SnSe@NF evaporation devices. More importantly, in-depth analysis of photothermal conversion mechanism underneath layered materials depicts a fundamental paradigm for design and application of photothermal devices based on them in the future.

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Publication details

The article was received on 12 Dec 2017, accepted on 06 Jan 2018 and first published on 08 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR09229F
Citation: Nanoscale, 2018, Accepted Manuscript
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    Layered tin monoselenide as advanced photothermal conversion materials for efficient solar energy driven water evaporation

    J.D. Yao, Z.Q. Zheng and G. Yang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR09229F

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