摘要
以柠檬酸为碳源,采用一步水热法制备了柠檬酸碳点(CDs)。将CDs掺杂到纤维素纳米纤维(CNF)中,经过物理交联后,制得磷光CDs@CNF气凝胶,以CDs作为供体和罗丹明B(RhB)作为受体,通过三重态到单重态磷光能量转移(TS-FRET)策略制备出红色余辉CDs-RhB@CNF气凝胶。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外-可见(UV-Vis)吸收光谱、稳态/瞬态荧光光谱和国际照明委员会(CIE)色度图对气凝胶光物理性能和微观形貌表征分析,结果显示:CDs@CNF在535 nm处的磷光寿命为144.88 ms,CDs均匀分布在CNF气凝胶中,气凝胶呈蜂窝状多孔结构;CDs-RhB@CNF气凝胶在600 nm处的磷光寿命为102.49 ms,Forster转移效率可达65.9%;掺杂罗丹明6G(Rh6G)和罗丹明123(Rh123)的荧光染料获得了具有黄色余辉发射的CDs-Rh6G@CNF及CDs-Rh123@CNF气凝胶;进一步将负载气凝胶的磷光纸应用于美观折纸和高级防伪领域,扩展了以天然生物质制备多色余辉材料的策略及应用领域。
Citric acid carbon dots(CDs)were prepared by a one-step hydrothermal method using citric acid as carbon source.The afterglow aerogel CDs@CNF was prepared by doping CDs into cellulose nanofibers(CNF)after physical cross-linking.The red afterglow aerogel CDs-RhB@CNF was prepared by triplet-to-singlet F rster resonance energy transfer(TS-FRET)strategy using CDs as donor and rhodamine B(RhB)as acceptor.The photophysical properties and microstructure of the aerogel were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),ultraviolet-visible(UV-Vis)absorption spectrum,steady-state transient fluorescence spectroscopy and International Commission on Illumination(CIE)chromatograms.The results showed that,the phosphorescence lifetime of CDs@CNF at 535 nm was 144.88 ms,the CDs were uniformly distributed in the CNF aerogel,which had a honeycomb porous structure.The phosphorescence lifetime of CDs-RhB@CNF at 600 nm was 102.49 ms,and the F rster transfer efficiency was up to 65.9%.The yellow afterglow aerogel CDs-Rh6G@CNF and CDs-Rh123@CNF were obtained by doping rhodamine 6G(Rh6G)and rhodamine 123(Rh123)with fluorescent dyes,and the aerogel-loaded phosphorescent paper was further applied in the field of aesthetic origami and advanced anti-counterfeiting,extending the strategy and application area of preparing multicolor afterglow materials from natural biomass.
作者
霍薪竹
曹梦楠
刘守新
陈志俊
李坚
李淑君
HUO Xinzhu;CAO Mengnan;LIU Shouxin;CHEN Zhijun;LI Jian;LI Shujun(College of Materials Science and Engineering,Northeast Forestry University,Harbin 150040,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2023年第5期1-7,共7页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(31890774)
黑龙江省优秀青年学者自然科学基金资助项目(YQ2020C017)。
