巴沙木碳量子点的性能及其在荧光油墨中的应用  

The properties of Balsa wood carbon quantum dotsand its application in fluorescent ink

作　　者：孙天懿 胡妙言 刘凯 高秋杰 郑晓凤 吕毅涌 徐长妍 徐丽 SUN Tianyi;HU Miaoyan;LIU Kai;GAO Qiujie;ZHENG Xiaofeng;LYU Yiyong;XU Changyan;XU Li(College of Materials Science and Engineering,Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Products,Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals,Nanjing Forestry University,Nanjing 210037,China;2019 Jiangsu graduate workstation:Jingjiang Guolin Wood Industry Co.Ltd.,Jingjiang 214500,China)

机构地区：[1]南京林业大学材料科学与工程学院,南京林业大学江苏省林产品高效加工利用联合创新中心,南京林业大学绿色生物质燃料与化学品江苏省重点实验室,南京210037 [2]2019年江苏省研究生工作站:靖江国林木业有限公司,靖江214500

出　　处：《林业工程学报》2024年第3期110-118,共9页Journal of Forestry Engineering

基　　金：国家自然科学基金(32071703)。

摘　　要：碳量子点是一种尺寸小于10 nm的荧光纳米材料,其因优异的发光特性,在多个领域尤其是防伪领域中备受关注,其制备方法也是多种多样。为探究不同方法所制碳量子点荧光特性的异同,以质轻、无毒害特性且自身含有硅元素的巴沙木包装废弃物作为原材料,分别用一步水热法与微波法制备碳量子点,并分别命名为H-CQDs和M-CQDs。通过对所制碳量子点的物理形貌、组分以及荧光性能的分析得出,2种方法制得的巴沙木碳量子点在365 nm紫外灯照射下均可发出蓝色荧光,且H-CQDs的荧光强度最高可达M-CQDs的3倍。H-CQDs与M-CQDs的光学性能具有相似性,它们的发光颜色相同、峰形位置相近;但同时激发波长也存在一定差异,H-CQDs的含氧官能团数量明显多于M-CQDs,H-CQDs的荧光量子产率(2.82%)高于M-CQDs(1.61%),且光学性能更为优异。同时,利用可发出明亮蓝色荧光且荧光量子产率较高的H-CQDs配制荧光油墨,该油墨在紫外灯下显示出明显的蓝色荧光,这说明巴沙木碳量子点可成功配制出荧光油墨,为其在防伪方面的应用提供了可能。Carbon quantum dots(CQDs)are fluorescent nanomaterials with a size less than 10 nm and their preparation methods are diverse.Due to excellent luminescent properties,carbon quantum dots have attracted much attention in multiple fields,especially in the field of anti-counterfeiting.To explore the similarities and differences in the fluorescence properties of carbon quantum dots prepared by different methods,this study used Balsa wood packaging waste with light weight,non-toxic properties,and its own silicon element as raw materials.The silicon element contained in Balsa wood was used as a doping element in the synthesis process of CQDs to improve the fluorescence quantum yield of CQDs.CQDs were prepared using the one-step hydrothermal method and microwave method,which were named as H-CQDs and M-CQDs,respectively.The optimal preparation process parameters for the hydrothermal method were the solid-liquid ratio of 1∶120,reaction temperature of 190℃,and reaction time of 10 h.While the optimal process parameters for the microwave method were the solid-liquid ratio of 1∶60,reaction power of 720 W,and reaction time of nine minutes.H-CQDs and M-CQDs were selected under the optimal experimental conditions for examinations of transmission electron microscopy(TEM),ultraviolet(UV),Fourier transform infrared(FT-IR),fluorescence and other tests to analyze and compare the similarities and differences of their performances.Through the analysis of the physical morphology,composition,and fluorescence performance of the prepared carbon quantum dots,it was found that both methods can emit blue fluorescence under the 365 nm ultraviolet light irradiation,but the fluorescence intensity of H-CQDs can reach up to three times of M-CQDs.The optimal excitation wavelength for H-CQDs was 340 nm,while the optimal excitation wavelength for M-CQDs was 360 nm.Meanwhile,CQDs solution was freeze-dried into powder,then the elements and functional groups in it were detected.According to the FT-IR and XPS results,it can be concluded that the opti

关 键 词：碳量子点 光学性能 荧光油墨 防伪 巴沙木 

分 类 号：O482.31[理学—固体物理]