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
Affiliations
Dongzhi Chen
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Xin Guo
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Xuening Sun
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Xiang Feng
School of Materials Science and Engineering Wuhan Textile University Wuhan Hubei P. R. China
Kailong Chen
School of Materials Science and Engineering Wuhan Textile University Wuhan Hubei P. R. China
Jinfeng Zhang
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Zece Zhu
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Xiaofang Zhang
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Xin Liu
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Min Liu
Institute of Super‐Microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University Changsha Hunan P. R. China
Li Li
School of Textiles and Clothing The Hong Kong Polytechnic University Hong Kong P. R. China
Weilin Xu
State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Wuhan Hubei P. R. China
Abstract 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 low toxicity. 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 fabricate matrix‐free ultra‐long RTP CDs by reclamation of the feather wastes for environmental sustainability.
