High-yield upcycling of feather wastes into solid-state ultra-long phosphorescence carbon dots for advanced anticounterfeiting and information encryption
Dongzhi Chen , Xin Guo , Xuening Sun , Xiang Feng , Kailong Chen , Jinfeng Zhang , Zece Zhu , Xiaofang Zhang , Xin Liu , Min Liu , Li Li , Weilin Xu
Exploration ›› 2024, Vol. 4 ›› Issue (6) : 20230166
High-yield upcycling of feather wastes into solid-state ultra-long phosphorescence carbon dots for advanced anticounterfeiting and information encryption
Recently, biomass-derived carbon dots (CDs) have attracted considerable attention in high-technology fields due to their prominent merits, including brilliant luminescence, superior biocompatibility, and lowtoxicity.However, most of the biomass-derived CDs only show bright fluorescence in diluted solution because of aggregation-induced quenching effect, hence cannot exhibit solid-state long-lived room-temperature phosphorescence (RTP) in ambient conditions. Herein, matrix-free solid-state RTP with an average lifetime of 0.50 s is realized in the CDs synthesized by one-pot hydrothermal treatment of duck feather waste powder. To further enhance RTP lifetime, hydrogen bonding is introduced by employing polyols like polyvinyl alcohol (PVA) and phytic acid (PA), and a bimodal luminescent CDs/PVA/PA ink is exploited by mixing the CDs and polyols. Astonishingly, the CDs/PVA/PA ink screen-printed onto cellulosic substrates exhibits unprecedented green RTP with average lifetime of up to 1.97 s, and the afterglow lasts for more than 14 s after removing UV lamp. Such improvement on RTP is proposed to the populated excited triplet excitons stabilized by rigid chains. Furthermore, the CDs/PVA/PA ink demonstrates excellent potential in anticounterfeiting and information encryption. To the best of the authors’ knowledge, this work is the first successful attempt to fabricatematrix-free ultra-long RTP CDs by reclamation of the feather wastes for environmental sustainability.
anti-counterfeiting ink / carbon dots / feather wastes / room-temperature phosphorescence / solid-state fluorescence
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2024 The Author(s). Exploration published by Henan University and John Wiley & Sons Australia, Ltd.
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