Hierarchical cactus-like microsphere network membranes engineered via multiple polyphenol-mediated complexation for efficient solar-powered water purification,Journal of Materials Chemistry A

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Hierarchical cactus-like microsphere network membranes engineered via multiple polyphenol-mediated complexation for efficient solar-powered water purification
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-08 , DOI: 10.1039/d2ta02841g
Xueting Zhao ₁ , Youyou Lan ₁ , Tingyuan Wang ₁ , Yuanyuan Jiang ₁ , Jiefeng Pan ₁

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The emerging solar steam generation technology enables an alternative water purification strategy, which shows great potential for alleviating the global energy and water crisis. The elaborate designs of interfacial photothermal materials play important roles in promoting solar steam generation. Herein, novel photothermal membranes with tailored hierarchical cactus-like microsphere networks are fabricated via multiple polyphenol-mediated complexation. The hierarchical cactus-like microsphere network exhibits bi-continuous, superwetting and photothermal functional features, which play critical roles in balancing solar-to-thermal and water-to-steam conversion. The tightly distributed hierarchical cactus-like microspheres simultaneously trap sunlight inside the porous network, and thus promote localized solar-to-thermal conversion. The bi-continuous porous and superhydrophilic microsphere network provides efficient water-transport/vapor-escape channels and facilitates water-to-steam conversion. These features endow the photothermal membrane with a high evaporation rate of 1.83 kg m⁻² h⁻¹ and a solar-to-vapor conversion efficiency of 95.2% under one sun illumination. The photothermal membranes are also demonstrated to produce clean water by seawater desalination and wastewater decolorization. Moreover, the universality of the proposed strategy to engineer hierarchical cactus-like microsphere network membranes provides a scalable and flexible platform for promising solar-powered water purification application.

中文翻译：

通过多种多酚介导的络合设计的分层仙人掌状微球网络膜用于高效的太阳能水净化

新兴的太阳能蒸汽发电技术使替代的水净化策略成为可能，这显示出缓解全球能源和水危机的巨大潜力。界面光热材料的精心设计在促进太阳能蒸汽产生方面发挥了重要作用。在此，具有定制的分层仙人掌状微球网络的新型光热膜通过以下方式制造：多酚介导的络合。分层仙人掌状微球网络表现出双连续、超润湿和光热功能特征，在平衡太阳能-热能和水-蒸汽转换方面发挥着关键作用。紧密分布的分层仙人掌状微球同时将阳光捕获在多孔网络内，从而促进局部太阳能热转换。双连续多孔和超亲水微球网络提供了有效的水运输/蒸汽逃逸通道，并促进了水到蒸汽的转化。这些特性使光热膜具有 1.83 kg m ^-2 h ^{-1的高蒸发率}在一次阳光照射下，太阳能到蒸汽的转换效率为 95.2%。光热膜还被证明可以通过海水淡化和废水脱色来生产清洁水。此外，所提出的设计分层仙人掌状微球网络膜的策略的普遍性为有前途的太阳能水净化应用提供了可扩展且灵活的平台。

更新日期：2022-06-08

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