Tea stain-inspired solar energy harvesting polyphenolic nanocoatings with tunable absorption spectra  

作　　者：Lu Yang Yuan Zou Wei Xia Haotian Li Xinyu He Yi Zhou Xianhu Liu Chaoqun Zhang Yiwen Li 

机构地区：[1]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China [2]National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,China [3]Key Laboratory for Biobased Materials and Energy of Ministry of Education,College of Materials and Energy,South China Agricultural University,483 Wushan Road,Guangzhou 510642,China [4]Guangdong Laboratory for Lingnan Modem Agricultural Science and Technology,483 Wushan Road,Guangzhou 510642,China

出　　处：《Nano Research》2021年第4期969-975,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21975167,21774079);the Program of the Science&Technology Department of Guangzhou,China(No.201803020039);the Fundamental Research Funds for Central Universities.

摘　　要：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.C u(ll)>Fe(lll),Ni(ll),Zn(ll))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/n s/'fty formation of meta卜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.

关 键 词：metal-polyphenolic nanocoating polymerization light absorption PHOTOTHERMAL solar desalination 

分 类 号：TB383[一般工业技术—材料科学与工程]