Hu Awei, Zhao Yuan, Hu Qing, Chen Chunhui, Lu Xiao, Cui Songlin, Liu Bo
Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, China.
School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, China.
Nat Commun. 2024 Nov 2;15(1):9484. doi: 10.1038/s41467-024-53902-1.
Three-dimensional solar steam evaporators with efficient water purification performance have received increasing attention recently. Herein, elastic polymer covalent organic frameworks (PP-PEG) containing PEG chains with intriguing adaptability to guests are prepared by forming porphyrin rings. PP-PEG foams demonstrate full spectrum absorbance and excellent photothermal conversion properties. Through well-designed thermal management and optimization of the hydrophilicity and PEG chain length, we obtain a highly efficient solar evaporator with an evaporation rate of 4.89 kg m h under 1 sun in self-contained mode. The optimized solar evaporation rate is increased to 18.88 kg m h under 1 sun with a facile truncated cone reflector, exceeding all known solar steam evaporators. This innovative design holds immense promise for desalination and water purification owing to its simple preparation, high efficiency and durability.
近年来，具有高效水净化性能的三维太阳能蒸汽蒸发器受到了越来越多的关注。在此，通过形成卟啉环制备了含有对客体具有有趣适应性的PEG链的弹性聚合物共价有机框架（PP-PEG）。PP-PEG泡沫表现出全光谱吸收和优异的光热转换性能。通过精心设计的热管理以及亲水性和PEG链长度的优化，我们获得了一种高效太阳能蒸发器，在自持模式下1个太阳光照强度下蒸发速率为4.89 kg m⁻² h⁻¹。使用简便的截头圆锥反射器，在1个太阳光照强度下优化后的太阳能蒸发速率提高到18.88 kg m⁻² h⁻¹，超过了所有已知的太阳能蒸汽蒸发器。这种创新设计因其制备简单、效率高和耐久性强，在海水淡化和水净化方面具有巨大的应用前景。
