One-dimensional Fe/C constructed Janus membrane enables highly-efficient and stable solar-driven interfacial evaporation

Advanced Membranes Pub Date : 2024-01-01 DOI:10.1016/j.advmem.2024.100108

Junqi Ning , Cailin Yang , Qiuyu Mei , Limingming Huang , Kai Han

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Abstract

The practical use of solar-driven interfacial evaporation is hampered by high cost, low photothermal conversion efficiency, and poor stability. Herein, a one-dimensional Fe/C constructed photothermal membrane is rationally developed to replace precious metals via the combination of Fe plasmon resonance with carbon molecular thermal vibration. The membrane exhibits excellent light absorbance (95.72 %) and water evaporation rate (2.60 kg m⁻² h⁻¹) leading to photothermal conversion efficiency up to 95.65 % under 1 sun illumination. Janus Fe/C membrane with superhydrophobic and hydrophilic structure is further prepared by polydimethylsiloxane (PDMS) coating to improve long-term stability. The evaporation rate can be maintained at over 90 % after 80 h illumination for real seawater treatment with metal ion removal efficiency >99 %. It also shows high evaporation performance and stability for organic solvents such as IPA, and NMP. Thus, the 1D Fe/C constructed Janus membrane is a promising candidate for energy-saving solar-driven interfacial solvent evaporation including seawater desalination, wastewater treatment, and organic solvent purification.

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一维 Fe/C 构建的 Janus 膜可实现高效稳定的太阳能驱动界面蒸发

太阳能驱动的界面蒸发因成本高、光热转换效率低和稳定性差而阻碍了其实际应用。在此，我们通过铁等离子体共振与碳分子热振动的结合，合理地开发了一种一维铁/碳构建的光热膜，以取代贵金属。该膜具有优异的光吸收率（95.72%）和水蒸发率（2.60 kg m-2 h-1），在太阳光照射下的光热转换效率高达 95.65%。通过聚二甲基硅氧烷（PDMS）涂层进一步制备了具有超疏水和亲水结构的 Janus Fe/C 膜，以提高其长期稳定性。在实际海水处理中，经过 80 小时光照后，蒸发率仍能保持在 90% 以上，金属离子去除率高达 99%。此外，它对 IPA 和 NMP 等有机溶剂也表现出较高的蒸发性能和稳定性。因此，一维 Fe/C 构建的 Janus 膜是太阳能驱动的节能界面溶剂蒸发（包括海水淡化、废水处理和有机溶剂提纯）的理想候选材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Membranes

CiteScore

8.50

自引率

0.00%

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