Article Dans Une Revue Journal of Colloid and Interface Science Année : 2024

Boosted light absorption by WO3-x/Ag/PbS heterostructure for high-efficiency interfacial solar steam generation

Résumé

Interfacial solar steam generation is considered a promising approach to address energy and drinking water shortages. However, designing efficient light-absorbing and photothermal-converting materials remains challenging. In this study, we describe a detailed method for synthesising a three-dimensional (3D) hierarchical oxygen defectrich WO3/Ag/PbS/Ni foam (termed WO3-x/Ag/PbS/NF) composite to realise efficient exciton separation and enhanced photothermal conversion. The 3D heterogeneous ternary photothermal material combines the individual benefits of WO3-x, Ag and PbS, improving charge transfer and promoting photogenerated electron-hole pairs. This enhances light absorption and energy conversion. Theoretical calculations indicate that the increased photothermal conversion efficiency primarily results from the heterojunction between Ag, WO3-x and PbS, facilitating exciton separation and electron transfer. Consequently, the WO3-x/Ag/PbS/NF solar evaporator exhibits exceptional light absorption (98% within the sunlight spectrum), a high evaporation rate of 1.90 kg m -2 h -1 under 1 sun and a light-to-heat conversion efficiency of 94%. The WO3x/Ag/PbS/NF evaporator also exhibits excellent capabilities in seawater desalination and wastewater treatment. This approach introduces a synergistic concept for creating novel multifunctional light-absorbing materials suitable for various energy-related applications.

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Dates et versions

hal-05351285 , version 1 (06-11-2025)

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Beibei Wang, Tongxian Wang, Shenghua Ma, Jinbo Bai, Haixia Ma. Boosted light absorption by WO3-x/Ag/PbS heterostructure for high-efficiency interfacial solar steam generation. Journal of Colloid and Interface Science, 2024, 660, pp.192-202. ⟨10.1016/j.jcis.2024.01.065⟩. ⟨hal-05351285⟩
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