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Tea stain-inspired solar energy harvesting polyphenolic nanocoatings with tunable absorption spectra
Nano Research ( IF 9.9 ) Pub Date : 2020-10-17 , DOI: 10.1007/s12274-020-3134-9
Lu Yang , Yuan Zou , Wei Xia , Haotian Li , Xinyu He , Yi Zhou , Xianhu Liu , Chaoqun Zhang , Yiwen Li

Discovery and development of new sustainable photothermal materials with tunable light absorption spectra play a key role in solar energy harvesting and conversion. One possible solution to this quest is to check nature as a source of matters or inspiration. Inspired by the formation of tea stains, a unique class of dark stain materials generated by the interfacial reaction between tea polyphenols and metal substance, we reported the facile preparation and screening of a series of photothermal nanocoating layers via the metal ion (i.e. Cu(II),Fe(III), Ni(II), Zn(II)) promoted in situ polymerization of typical phenolic moieties of tea polyphenols (i.e., catechol and pyrogallol). It was found that those resulting metal-polyphenolic nanocoatings showed various promising features, such as high blackness and strong adhesion, excellent and tunable light absorption properties, good hydrophilicity and long-term stability. We further fabricated the photothermal composite devices by in situ formation of metal-polyphenolic nanocoatings on pristine silks for solar desalination, which demonstrated promising durable evaporation behaviors with excellent evaporation rates and steam generation efficiencies. We believe that this work could provide more opportunities towards new types of bio-inspired and sustainable photothermal nanomaterials for solar energy harvesting applications such as water desalination.



中文翻译:

具有可调吸收光谱的茶渍启发式太阳能收集多酚纳米涂层

具有可调光吸收光谱的新型可持续光热材料的发现和开发在太阳能收集和转换中起着关键作用。解决这一问题的一种可能的方法是将自然作为物质或灵感的来源。受茶渍形成的启发,茶渍是由茶多酚与金属物质之间的界面反应生成的一类独特的深色污渍材料,我们报告了通过金属离子(即Cu(II ),Fe(III),Ni(II),Zn(II))原位促进茶多酚(即儿茶酚和邻苯三酚)的典型酚类部分的聚合。发现这些所得的金属-多酚纳米涂层显示出各种有希望的特征,例如高黑度和强粘附性,优异和可调节的光吸收性质,良好的亲水性和长期稳定性。我们进一步原位制造了光热复合器件在用于太阳能淡化的原始丝上形成金属-多酚纳米涂层,这证明了其有希望的持久蒸发性能,并具有出色的蒸发速率和蒸汽产生效率。我们相信这项工作可以为新型的受生物启发和可持续发展的光热纳米材料提供更多的机会,这些材料可用于太阳能收集应用,例如淡化海水。

更新日期:2020-10-17
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