Qin Dong-Dong, Zhu Ying-Jie, Yang Ri-Long, Xiong Zhi-Chao
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Nanoscale. 2020 Mar 28;12(12):6717-6728. doi: 10.1039/c9nr10357k. Epub 2020 Mar 12.
Solar energy-driven interfacial water evaporation is a promising energy utilization technology in the field of seawater desalination and water purification. However, the accumulation of salt on the heating surface severely impairs the water evaporation performance and long-time stability. Herein, we demonstrate a new kind of photothermal paper comprising a high-temperature-resistant paper made from ultralong hydroxyapatite nanowires and glass fibers and black nickel oxide (NiO) nanoparticles for solar energy-driven desalination. Owing to the high photothermal conversion ability, fast water transportation in the air-laid paper, and good heat insulation, the hydrophilic HN/NiO photothermal paper can achieve efficient, stable and recyclable water evaporation performance. In addition, a Janus HN/NiO photothermal paper based on hydrophobic sodium oleate-modified ultralong hydroxyapatite nanowires has been developed, and it has a high water evaporation efficiency of 83.5% under 1 kW m irradiation. In particular, with the bottom hydrophobic ultralong hydroxyapatite nanowire layer and water-transporting channels in the air-laid paper to facilitate salt exchange, the as-prepared Janus evaporator exhibits no salt accumulation on the surface, high performance and long-time stable desalination using simulated seawater (3.5 wt% NaCl). Furthermore, the Janus evaporator with the hydrophobic ultralong hydroxyapatite nanowire substrate can be extended to support other photothermal materials such as black titanium oxide (TiO) and Ketjen black carbon. The as-prepared Janus HN/TiO and Janus HN/KB photothermal paper also exhibit salt-resistant desalination function. The as-prepared Janus salt-resistant photothermal paper with efficient, stable and recyclable merits has great potential in solar energy-driven desalination and water purification.
太阳能驱动的界面水蒸发是海水淡化和水净化领域中一种很有前景的能源利用技术。然而，加热表面上盐的积累严重损害了水蒸发性能和长期稳定性。在此，我们展示了一种新型的光热纸，它由超长羟基磷灰石纳米线和玻璃纤维制成的耐高温纸以及用于太阳能驱动脱盐的黑色氧化镍（NiO）纳米颗粒组成。由于具有高光热转换能力、在气流成网纸中快速的水传输以及良好的隔热性能，亲水性的HN/NiO光热纸能够实现高效、稳定且可回收的水蒸发性能。此外，还开发了一种基于疏水性油酸钠改性超长羟基磷灰石纳米线的双面HN/NiO光热纸，在1 kW m辐照下其具有83.5%的高水蒸发效率。特别是，由于底部疏水性超长羟基磷灰石纳米线层以及气流成网纸中的水传输通道便于盐分交换，所制备的双面蒸发器在使用模拟海水（3.5 wt% NaCl）时表面无盐积累，具有高性能和长期稳定的脱盐性能。此外，具有疏水性超长羟基磷灰石纳米线基底的双面蒸发器可以扩展用于支撑其他光热材料，如黑色氧化钛（TiO）和科琴黑碳。所制备的双面HN/TiO和双面HN/KB光热纸也表现出抗盐脱盐功能。所制备的具有高效、稳定和可回收优点的双面抗盐光热纸在太阳能驱动的海水淡化和水净化方面具有巨大潜力。
