Abstract

Addressing the challenge of water scarcity effectively involves employing a scalable, affordable, maintainable, porous, and efficient interfacial surface solar steam generator (ISSG). Herein, we explore that the efficacy of Bi-doped VO₂ (Bi:VO₂) as an efficient photothermal material coated on poplar wood is investigated within the ISSG of seawater. The integration enhances the photothermal conversion efficiency of VO₂, primarily via the surface plasmon resonance (SPR) effect. The optimal performance was achieved for Bi:VO₂ with the concentration of 2 g L⁻¹. This configuration achieved a remarkably high evaporation flux of 3.4 kg m⁻² h⁻¹ and was achieved under the power density of 3 sun (1 sun = 1 kW m⁻²), surpassing the evaporation rate of seawater alone by sixfold. Significantly, this photoabsorber reduced Na⁺ concentration in seawater from 1200 to 100 mg L⁻¹. The high ISSG performance of the Bi:VO₂ photoabsorber in the ISSG can be attributed to several factors, notably the absorption of visible and near-infrared light, the SPR effect induced by Bi, and the low thermal conductivity and porous structure of wood as a substrate. Furthermore, the Bi:VO₂ photoabsorber demonstrates remarkable stability, maintaining consistent efficiency even after 10 cycles.

中文翻译：

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双掺杂 VO2 涂覆在木材上作为界面太阳能蒸汽发生中的高效光吸收剂

摘要

有效解决水资源短缺的挑战需要采用可扩展、经济实惠、可维护、多孔且高效的界面太阳能蒸汽发生器（ISSG）。在此，我们探索了 Bi 掺杂 VO ₂ (Bi:VO ₂ ) 作为涂覆在杨木上的高效光热材料在海水 ISSG 中的功效。这种集成主要通过表面等离子体共振（SPR）效应提高了VO ₂的光热转换效率。 Bi:VO _{2 的}浓度为2 g L ^-1时获得了最佳性能。这种配置实现了3.4 kg m ^-2  h ^-1的极高蒸发通量，并且是在3 sun（1 sun = 1 kW m ^-2 ）的功率密度下实现的，比单独海水的蒸发率高出六倍。值得注意的是，这种光吸收剂将海水中的Na ⁺浓度从1200 mg L -1 降低至100 mg L ^-1。 ISSG中Bi:VO ₂光吸收剂的高ISSG性能可归因于几个因素，特别是可见光和近红外光的吸收、Bi引起的SPR效应以及木材的低导热率和多孔结构。基材。此外，Bi:VO ₂光吸收剂表现出卓越的稳定性，即使在10个循环后仍保持一致的效率。