期刊
NANO RESEARCH
卷 14, 期 4, 页码 969-975出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-020-3134-9
关键词
metal-polyphenolic nanocoating; polymerization; light absorption; photothermal; solar desalination
类别
资金
- National Natural Science Foundation of China [21975167, 21774079]
- Program of the Science & Technology Department of Guangzhou, China [201803020039]
- Fundamental Research Funds for Central Universities
The discovery and development of new sustainable photothermal materials with tunable light absorption properties, inspired by nature, have been successfully achieved using metal-polyphenolic nanocoatings. These materials exhibit excellent light absorption and stability, and show promising applications in solar energy harvesting for solar desalination.
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 layersviathe metal ion (i.e. Cu(II),Fe(III), Ni(II), Zn(II)) promotedin situpolymerization 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 byin situformation 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.
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